Method for the production of precision shapes

A method for producing precision shapes which includes the consolidation of powder metal preforms into a shaped porous preform. A first coating is applied to the preform, this first coating being porous while providing a diffusion barrier. A second coating which is also initially porous is then applied and the coated preform can then be degasified by subjecting the preform to a vacuum, particularly at elevated temperatures. The coated preform is then heated under vacuum to a temperature such that the second coating is densified to the extent that it becomes non-porous. Finally, the preform is subjected to a hot isostatic pressing operation whereby formation of high integrity, fully dense metal shape results.

METHOD OF MANUFACTURING ARTICLES PF CERAMIC OR METALLIC MATERIAL

METHOD OF MOULDING CERAMIC MATERIAL

PROCEDURE AND DEVICE FOR THE PRODUCTION OF A POWDER WORKPIECE BY ISO-STATIC PRESSING

SILICON NITRIDE ARTICLE

METHOD OF MANUFACTURING AN OBJECT OF METALLIC OR CERAMIC MATERIAL

METHOD FOR PRODUCING A COUNTER-FORM AND METHOD FOR MANUFACTURING A PART HAVING A COMPLEX SHAPE USING SUCH A COUNTER-FORM

Cette invention concerne un procédé de réalisation d'une contre-forme (20) de fabrication de pièce de forme complexe (24) par densification par frittage sous pression. La contre-forme (20) est formée de couches successives réalisées par une impression additive en trois dimensions (3D) pilotée numériquement selon les étapes suivantes : - enregistrer numériquement un négatif en trois dimensions de la pièce à réaliser (24) dans une unité de commande d'un système d'impression additive en trois dimensions afin de constituer la forme positive de la contre-forme à réaliser; - réaliser la contre-forme (20) par une technique d'impression additive 3D. La pièce de forme complexe (24d) est alors fabriquée par frittage sous pression, puis séparée de la contre-forme également frittée (20d).

PROCEDE POUR LA FABRICATION D'UN OBJET A PARTIR DE MATIERE METALLIQUE OU CERAMIQUE

CE PROCEDE CONCERNE LA FABRICATION D'UN OBJET A PARTIR D'UNE MATIERE SOUS FORME D'UNE POUDRE, PAR PRESSAGE ISOSTATIQUE D'UN CORPS PREFORME A PARTIR DE LA POUDRE AU MOYEN D'UN AGENT DE PRESSION GAZEUX, LE CORPS PREFORME ETANT ENTOURE D'UNE GAINE PERMEABLE AUX GAZ QUI SE TRANSFORME EN UNE GAINE IMPERMEABLE A L'AGENT DE PRESSION ET ENFERME LE CORPS PREFORME, APRES QUOI LE PRESSAGE ISOSTATIQUE EST EFFECTUE POUR LE FRITTAGE DU CORPS PREFORME. LA GAINE PERMEABLE AUX GAZ 15 EST TRANSFORMEE EN GAINE IMPERMEABLE A L'AGENT DE PRESSION, PENDANT QUE CETTE GAINE EST MISE EN CONTACT AVEC UN GAZ COMPRIME ET PENDANT QU'IL EST MAINTENU, DANS CE GAZ, UNE PRESSION AUSSI ELEVEE QUE LA PRESSION QUI REGNE DANS LE GAZ QUI SE TROUVE DANS LES PORES DU PRODUIT PREFORME 14.

METHOD OF MANUFACTURING A SINTERED BODY FROM POWDERED MATERIAL

... 1374033 Isostatic hot pressing ALLM€NNA SVENSKA ELEKTRISKA AB 14 March 1972 [15 March 1971] 11739/72 Heading C7D Sintered bodies are made by coating the surface of a powder compact with a lower melting material or a material forming a eutectic with the powder body, heating under vacuum to melt the coating and then isostatically hot pressing the coated compact with an inert pressure gas e.g. A, He, N 2 or H 2 . The powder compact may be Mo, WC, TaC, TiC or VC and the coating material may be enamel or glass applied by flame or plasma spraying or immersion. In the case of Mo the coating may be Ni which forms a eutectic with Mo. The melting and hot pressing may be carried out in the same or separate furnaces and although it is preferable to allow the fused coating to solidify before hot pressing, in some cases hot pressing may be effected when the coating is still fluid.

ISOSTATIC HOT PRESSING METAL OR CERAMIC

Method of manufacturing articles of ceramic or metallic material

For manufacturing an article of a ceramic or metallic material by sintering and simultaneous isostatic pressing of a powder of the material, the powder is enclosed in an embedding material of glass which is made impermeable to gas before the isostatic pressing is carried out with a gaseous pressure medium. The powder is introduced into the mould cavity of a mould 10 made of glass powder, the mould cavity having a shape corresponding to that of the article to be manufactured, whereafter the mould is covered with glass 14 which, together with the mould, forms an embedding material for the powder. The powder and the embedding material are then located in a vessel 15, and the embedding material is transformed into a melt having a surface limited by the walls of the vessel, below which surface the powder in the mould cavity is located, before the pressure necessary for the isostatic pressing is applied to the melt with the gaseous pressure medium. Alternatively the tube through which the mould ...

METHOD FOR THE PRODUCTION OF PRECISION SHAPES

POWER METAL OR CERAMIC MATERIAL BY ISOSTATIC PRESSING OF POWDERS

Method of manufacturing a sintered powder body

MANUFACTORING PROCESS Of OBJECTS OUT OF SILICON NITRIDE

L'INVENTION EST RELATIVE A LA FABRICATION D'OBJETS EN NITRURE DE SILICIUM. DANS UN PROCEDE DE FABRICATION D'OBJETS EN NITRURE DE SILICIUM PAR COMPRESSION ISOSTATIQUE D'UN CORPS PREFORME D'UNE POUDRE DE NITRURE DE SILICIUM AVEC UN MILIEU SOUS PRESSION GAZEUX, CE CORPS PREFORME ETANT ENTOURE PAR UNE ENCEINTE PERMEABLE AUX GAZ, QUI EST TRANSFORMEE EN UNE ENCEINTE IMPERMEABLE AU MILIEU DE PRESSION, L'ENCEINTE PERMEABLE AUX GAZ 11 EST TRANSFORMEE EN L'ENVELOPPE IMPERMEABLE AU MILIEU DE PRESSION TANDIS QU'ELLE EST EN CONTACT AVEC UN GAZ SOUS PRESSION ET TANDIS QU'UNE PRESSION EST ENTRETENUE DANS CE GAZ SOUS PRESSION, QUI EST AU MOINS AUSSI ELEVEE QUE LA PRESSION PREVALANT SIMULTANEMENT DANS LE GAZ EXISTANT DANS LES PORES DU PRODUIT PREFORME 10. CE PROCEDE PERMET LA FABRICATION D'OBJETS EN NITRURE DE SILICIUM, PRESENTANT DES FORMES COMPLIQUEES. THE INVENTION RELATES TO THE MANUFACTURE OF OBJECTS FROM SILICON NITRIDE. IN A PROCESS FOR MANUFACTURING SILICON NITRIDE OBJECTS BY ISOSTATIC COMPRESSION OF A PREFORMED BODY OF A SILICON NITRIDE POWDER WITH A GAS PRESSURIZED MEDIUM, THIS PREFORMED BODY SURROUNDED BY A GAS PERMEABLE ENCLOSURE, WHICH IS TRANSMITTED INTO AN ENCLOSURE IMPERMEABLE IN THE PRESSURE ENVIRONMENT, THE PERMEABLE GAS ENCLOSURE 11 IS TRANSFORMED INTO THE IMPERMEABLE ENCLOSURE IN THE PRESSURE ENVIRONMENT WHILE IT IS IN CONTACT WITH A GAS UNDER PRESSURE AND WHILE PRESSURE IS CONTAINED IN THIS GAS UNDER PRESSURE, WHICH IS AT LEAST AS HIGH AS THE PRESSURE CONCERNING SIMULTANEOUSLY IN THE GAS EXISTING IN THE PORES OF THE PREFORMED PRODUCT 10. THIS PROCESS ALLOWS THE MANUFACTURING OF OBJECTS IN SILICON NITRIDE, PRESENTING COMPLICATED FORMS.

Method for consolidating precision shapes

A method for consolidating powder metal preforms and for thereby producing high performance metal shapes from powder particles. The powder particles are consolidated into a shaped porous preform, and a coating is then applied to the resulting preform. The coating is initially porous whereby the coated preform can be degasified by subjecting the preform to a vacuum, particularly at elevated temperatures. The coated preform is then heated under vacuum to a temperature such that the coating is densified to the extent that it becomes non-porous. The coated preform is then subjected to a hot isostatic pressing operation whereby formation of a high integrity, fully dense metal shape results.

Способ изготовления изделий из нитрида кремния

METHOD FOR THE PRODUCTION OF PRECISION SHAPES

METHOD FOR THE PRODUCTION OF ION SHAPES A method for producing precision shapes which includes the consolidation of powder metal preforms into a shaped porous preform. When formed by powder metallurgy techniques, precision shapes have highly desirable characteristics from the standpoint of grain structure, and the production of preforms in accordance with the invention enhances the achievement of such shapes. In practicing the method, a first coating 16 is applied to the preform 14, this first coating being porous while providing a diffusion barrier. A second coating 18 which is also initially porous is then applied and the coated preform can then be degasified by subjecting the preform to a vacuum, particularly at elevated temperatures. The coated preform is then heated under vacuum to a temperature such that the second coating is densified to the extent that it becomes nonporous. Finally, the preform is subjected to a hot isostatic pressing operation whereby formation of a high integrity ...

PROCESS FOR the MANUFACTURE Of an OBJECT FROM METAL OR CERAMIC MATTER

MANUFACTORING PROCESS OF METAL PARTS OF FORM BY METALLURGY OF THE POWDERS

PROCESS FOR the MANUFACTURE Of an OBJECT OUT OF SILICON NITRIDE

SETT ATT FRAMSTELLA ETT FOREMAL AV ETT MATERIAL I FORM AV ETT PULVER GENOM ISOSTATISK PRESSNING AV EN AV PULVRET FORFORMAD KROPP

Method of manufacturing an object of silicon nitride

A method for manufacturing an object of silicon nitride by isostatic pressing of a preformed body of silicon nitride powder utilizing a pressure medium at a temperature sufficiently high to sinter the silicon nitride. The preformed body is subjected to a degassing operation before isostatic pressing. An inner porous layer of a first material and then an outer porous layer of a second material are applied on the preformed powder body. The inner porous layer is transformable, at a temperature below the sintering temperature for silicon nitride, into a pressure medium impermeable layer. The outer porous layer is also transformable into a pressure medium impermeable layer, but at a temperature which is lower than the temperature when the inner porous layer is converted into its pressure medium impermeable form. Thus, the preformed body is first subjected to a degassing and to a heating to the temperature for transforming the outer porous layer into a pressure medium impermeable layer while ...

IMPROVED PROCEDURE FOR CONSOLIDATING POROUS OF CERAMIC CONSTRUCTION UNITS FOR HOT-ISOSTATIC PRESSING.

PROCEEDED OF CONSOLIDATION OF PROFILE PRECISION

PROCESS FOR the MANUFACTURE Of an OBJECT FROM METAL OR CERAMIC MATTER

SETT ATT FRAMSTELLA ETT FOREMAL AV KISELNITRID GENOM ISOSTATISK PRESSNING AV EN AV KISELNITRIDPULVER FORFORMAD KROPP MED ETT GASFORMIGT TRYCKMEDIUM

VERFAHREN ZUM HERSTELLEN VON METALLISCHEN PRAEZISIONSFORMTEILEN AUS PULVERN

Method of manufacturing a sintered powder body

PROCEDE POUR FABRIQUER UN CORPS MOULE EN MATIERE CERAMIQUE

... a. L'invention concerne un procédé pour fabriquer un corps moulé en matière céramique, par exemple en nitrure de silicium ou en carbure de silicium, du type selon lequel on comprime le corps moulé disposé dans une capsule sous vide en verre résistant aux températures élevées, à l'aide d'une pression agissant sur lui de tous côtés jusqu'à ce qu'il ne presente plus de pores. b. Ce procédé est caractérisé en ce qu'on dépose, sur le corps moulé, les matières composantes de la capsule en verre, à l'état non vitrifié, et on les soumet sous vide à leur température de réaction jusqu'à la formation d'une couche de verre continue enfermant le corps moulé et constituant la capsule. c. L'invention est applicable à la fabrication des corps moulés de résistance élevée.

POWER METAL OR CERAMIC MATERIAL BY ISOSTATIC PRESSING OF POWDERS

PROCEDE DE FABRICATION D'UN OBJET A PARTIR D'UNE MATIERE CERAMIQUE OU METALLIQUE PAR PRESSAGE ISOSTATIQUE. UNE POUDRE DE CETTE MATIERE EST RENFERMEE DANS UN ENROBAGE DE VERRE QUI EST RENDU IMPERMEABLE AUX GAZ AVANT DE PROCEDER AU PRESSAGE ISOSTATIQUE AVEC FRITTAGE DE LA POUDRE. LA POUDRE EST ENSUITE INTRODUITE DANS LA CAVITE DE MOULAGE D'UN MOULE EN POUDRE DE VERRE 10, CETTE CAVITE DE MOULAGE CORRESPONDANT A L'OBJET A FABRIQUER. APRES QUOI LA CAVITE DE MOULAGE 11 EST RECOUVERTE DE VERRE, QUI FORME AVEC LE MOULE UN ENROBAGE POUR LA POUDRE DE MATIERE CERAMIQUE OU METALLIQUE. LA MATIERE D'ENROBAGE, QUE L'ON PLACE AVEC LA POUDRE DANS UN RECIPIENT QUI RESISTE A LA TEMPERATURE DE FRITTAGE, EST TRANSFORMEE EN UNE MASSE FONDUE QUI A UNE SURFACE DELIMITEE PAR LES PAROIS DU RECIPIENT, SURFACE SOUS LAQUELLE LA MATIERE SE TROUVE DANS LA CAVITE DE MOULAGE, ET ON APPLIQUE UNE PRESSION NECESSAIRE AU PRESSAGE ISOSTATIQUE SUR LA MASSE FONDUE PAR UN MOYEN DE PRESSION SOUS FORME DE GAZ. APPLICATION: FABRICATION D'OBJETS A PARTIR D'UNE MATIERE CERAMIQUE OU METALLIQUE TELS QUE ROUES DE TURBINE, FRAISES, ETC. METHOD OF MANUFACTURING AN OBJECT FROM A CERAMIC OR METAL MATERIAL BY ISOSTATIC PRESSING. A POWDER OF THIS MATERIAL IS CONTAINED IN A GLASS COATING WHICH IS MADE IMPERMEABLE TO GAS BEFORE PROCEEDING TO ISOSTATIC PRESSING WITH SINTING OF THE POWDER. THE POWDER IS THEN INTRODUCED INTO THE MOLDING CAVITY OF A GLASS POWDER MOLD 10, THIS MOLDING CAVITY CORRESPONDING TO THE OBJECT TO BE MANUFACTURED. AFTER WHAT, THE MOLDING CAVITY 11 IS COVERED WITH GLASS, WHICH WITH THE MOLD FORM A COATING FOR THE POWDER OF CERAMIC OR METAL MATERIAL. THE COATING MATERIAL, WHICH IS PLACED WITH THE POWDER IN A CONTAINER THAT RESISTS TO THE SINTERING TEMPERATURE, IS TRANSFORMED INTO A MELT MASS WHICH HAS A SURFACE DELIMITED BY THE WALLS OF THE CONTAINER, SURFACE UNDER WHICH THE MATERIAL IS LOCATED IN THE MOLDING CAVITY, AND A PRESSURE NECESSARY FOR ISOSTATIC PRESSING IS ...

SETT ATT TILLVERKA EN FORMKROPP AV KERAMIK

Method of moulding ceramic material

A method for the manufacturing of a molded member from a ceramic material, including compressing the molded member within an evacuated capsule of a high temperature-resistant glass under a pressure acting thereabout until the molded member attains a non-porous condition. The working materials for the glass capsule are applied to the molded member in a non-vitrified state; and the coated member is subjected to the reaction temperature of the materials under a vacuum until there is formed a cohesive glass layer enveloping the molded member which will constitute the capsule.

Method for encapsulating a body of ceramic material

For encapsulating a ceramic molded member for high-temperature isostatic pressing (HIP), a generally porous coating of glass and/or ceramic is applied on the molded member of ceramic and sintered under a vacuum into a pressure-tight capsule encompassing the molded member.

ISOSTATIC PRESSING

METHOD OF MANUFACTURING ARTICLES OR OBJECTS OF SILICON NITRIDE

PROCESS FOR the MANUFACTURE Of an OBJECT OUT OF SILICON NITRIDE

PROCEDE DE CONSOLIDATION DE PROFILES DE PRECISION

L'invention a trait à la fabrication de pièces profilées métalliques. Elle a pour objet un procédé de fabrication de profilés métalliques à partir de particules de poudre selon lequel les particules sont façonnées en une préforme poreuse autoportante qui est soumise à une opération de pressage isostatique à chaud. Ce procédé est caracterisé par les opérations de formation d'un revêtement poreux sur la préforme avant pressage isostatique à chaud, soumission de la réforme revêtue à un vide de façon à la dégazer, chauffage de la préforme revêtue, tout en maintenant le vide, à une température suffisante pour densifier complètement ledit revêtement de sorte que celui-ci devienne non poreux et ensuite soumission de ladite préforme audit pressage isostatique à chaud Application : profiles métalliques de précision.

ISOSTATIC HOT PRESSING METALLIC POWDER PREFORMS

ISOSTATICALLY HOT PRESSED SILICON NITRIDE

METHOD FOR ENCAPSULATING A BODY OF CERAMIC MATERIAL

PROCEEDED FOR MANUFACTURE BY ISOSTATIC PRESSING Of a BODY PREFORMS IN a MATTER METAL OR CERAMIC COATS IN a VITRIFIABLE MATERIAL

METHOD FOR PRODUCING A FOREIGN MATERIAL

a. L'invention concerne un procédé pour fabriquer un corps moulé en matière céramique, par exemple en nitrure de silicium ou en carbure de silicium, du type selon lequel on comprime le corps moulé disposé dans une capsule sous vide en verre résistant aux températures élevées, à l'aide d'une pression agissant sur lui de tous côtés jusqu'à ce qu'il ne presente plus de pores. b. Ce procédé est caractérisé en ce qu'on dépose, sur le corps moulé, les matières composantes de la capsule en verre, à l'état non vitrifié, et on les soumet sous vide à leur température de réaction jusqu'à la formation d'une couche de verre continue enfermant le corps moulé et constituant la capsule. c. L'invention est applicable à la fabrication des corps moulés de résistance élevée. at. The invention relates to a method for manufacturing a molded body of ceramic material, for example of silicon nitride or of silicon carbide, of the type according to which the molded body disposed in a glass vacuum capsule resistant to high temperatures, at using pressure acting on it from all sides until it no longer presents any pores. b. This process is characterized by depositing, on the molded body, the component materials of the glass capsule, in the unglazed state, and they are subjected under vacuum at their reaction temperature until the formation of a continuous glass layer enclosing the molded body and constituting the capsule. vs. The invention is applicable to the manufacture of high strength moldings.

Procédé de fabrication de pièces métalliques de forme par métallurgie des poudres.

Le procédé suivant l'invention concerne les pièces de forme fabriquées par métallurgie des poudres, qui sont densifiées par compression isostatique à chaud. Le procédé consiste à revêtir une préforme poreuse crue de deux couches de revêtement poreux. La préforme revêtue est chauffée sous vide jusqu'à une température qui provoque la densification de la couche externe qui devient étanche. On effectue alors la compression isostatique à chaud pour densifier la préforme. Le procédé permet, en particulier, de fabriquer des pièces en super-alliages à hautes caractéristiques exemptes de défauts, qui approchent de très près les dimensions désirées, ce qui réduit beaucoup les pertes de métal.

VERFAHREN ZUR HERSTELLUNG EINES SINTERKOERPERS MIT HOHER DICHTE.

PROCESS FOR COMPACTING POROUS CERAMIC PARTS FOR HOT ISOSTATIC PRESSING

A process for compacting a porous ceramic structural member having a complicated shape and an optional size by encapsulation with material of the same type and capable of sintering and subsequently subjected to hot-isostatic pressing; immersing the preformed body in a suspension of a material of the same type in a solvent but which contains no sintering aid and forming a first encapsulating layer; evaporating the solvent; immersing the thus obtained body in a second suspension of a material in a solvent of the same type capable of sintering and which contains one or more sintering aids, and forming a second encapsulating layer; evaporating the solvent; subjecting the thus obtained body at an elevated temperature in an atmosphere of a protective gas for a sufficient period of time to sinter the same; isostatically compacting the body provided with a tight-sintered surface; and mechanically removing the encapsulating layers.

Method of manufacturing an article of powdered material

A body preformed from a powdered material other than silicon nitride is surrounded with a casing, which is permeable to gas. The casing is transformed upon heating into a layer which is impermeable to the pressure medium which is used during isostatic pressing of the preformed body, while a pressure is maintained by a pressure gas outside the casing which is at least as high as the pressure of the gas present in the pores of the preformed product. When the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while simultaneously sintering the body. The casing may be a glass, metal or ceramic powder applied as a slurry or by flame spraying. The powders pressed may be Fe or Ni based alloys or Al2O3.

ISOSTATICALLY HOT PRESSING POWDERED MATERIAL

AN OBJECT OF SILICON NITRIDE

METHOD FOR PRODUCING A COUNTER-FORM AND METHOD FOR PRODUCING A COMPLEX-SHAPED PART USING SUCH A COUNTER-FORM

Cette invention concerne un procédé de réalisation d'une contreforme (20) de fabrication de pièce de forme complexe (24) par densification par frittage sous pression. La contre-forme (20) est formée de couches successives réalisées par une impression additive en trois dimensions (3D) pilotée numériquement selon les étapes suivantes : - enregistrer numériquement un négatif en trois dimensions de la pièce à réaliser (24) dans une unité de commande d'un système d'impression additive en trois dimensions afin de constituer la forme positive de la contre-forme à réaliser ; - réaliser la contre-forme (20) par une technique d'impression additive 3D. La pièce de forme complexe (24d) est alors fabriquée par frittage sous pression, puis séparée de la contre-forme également frittée (20d). The invention relates to a method for producing a counterform (20) for manufacturing a complex shaped part (24) by densification by pressure sintering. The counterform (20) is formed of successive layers produced by an additive three-dimensional (3D) printing controlled digitally according to the following steps: - digitally recording a three-dimensional negative of the part to be produced (24) in a unit of control of a three-dimensional additive printing system in order to constitute the positive form of the counterform to be produced; - realize the counterform (20) by a 3D additive printing technique. The complex shaped part (24d) is then produced by pressure sintering, then separated from the counter-sintered form (20d).

PROCEDE DE FABRICATION D'OBJETS EN MATIERE CERAMIQUE OU METALLIQUE PAR PRESSAGE ISOSTATIQUE DE POUDRES

PROCEDE DE FABRICATION D'UN OBJET A PARTIR D'UNE MATIERE CERAMIQUE OU METALLIQUE PAR PRESSAGE ISOSTATIQUE. UNE POUDRE DE CETTE MATIERE EST RENFERMEE DANS UN ENROBAGE DE VERRE QUI EST RENDU IMPERMEABLE AUX GAZ AVANT DE PROCEDER AU PRESSAGE ISOSTATIQUE AVEC FRITTAGE DE LA POUDRE. LA POUDRE EST ENSUITE INTRODUITE DANS LA CAVITE DE MOULAGE D'UN MOULE EN POUDRE DE VERRE 10, CETTE CAVITE DE MOULAGE CORRESPONDANT A L'OBJET A FABRIQUER. APRES QUOI LA CAVITE DE MOULAGE 11 EST RECOUVERTE DE VERRE, QUI FORME AVEC LE MOULE UN ENROBAGE POUR LA POUDRE DE MATIERE CERAMIQUE OU METALLIQUE. LA MATIERE D'ENROBAGE, QUE L'ON PLACE AVEC LA POUDRE DANS UN RECIPIENT QUI RESISTE A LA TEMPERATURE DE FRITTAGE, EST TRANSFORMEE EN UNE MASSE FONDUE QUI A UNE SURFACE DELIMITEE PAR LES PAROIS DU RECIPIENT, SURFACE SOUS LAQUELLE LA MATIERE SE TROUVE DANS LA CAVITE DE MOULAGE, ET ON APPLIQUE UNE PRESSION NECESSAIRE AU PRESSAGE ISOSTATIQUE SUR LA MASSE FONDUE PAR UN MOYEN DE PRESSION SOUS FORME DE GAZ. APPLICATION: FABRICATION ...

Process for the production of a component by producing a molding using a metal or ceramic powder as the starting material

Process for the production of a component, in which metal or ceramic powder (6) is applied under centrifugal force to the inner wall of a gas-permeable mold (13), which is under reduced pressure and is located in a reduced-pressure vessel (10), and precompacted, after which the mold (13) is removed from the vessel (10) and sintered. The mold (13) consists of a heap of ceramic grains with an organic binder having high strength between room temperature and a temperature just below the sintering temperature, in order to support the powder (6) to be sintered to give the component. When sintering starts, the binder evaporates or burns away, as a result of which the mold (13) substantially loses its supporting action for the component. Binder: aminolic, phenolic, furan resin.

Method for manufacturing an object of silicon nitride

Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

Container made of a porous material and coated with precious metal nanoparticles and method thereof

A container made of a porous material and coated with precious metal nanoparticles is disclosed. The method of making it includes: adding precious metal nanoparticles and intermedium particles to a solution; maintaining the solution at a first temperature; heating a container body made of a porous material at a second temperature; and immersing the container body in the solution wherein the temperature difference between the first temperature and the second temperature causes the precious metal nanoparticles and intermedium particles to permeate into the pores of the container body. The resultant container has precious metal nanoparticles not only attached to its surface but also within its pores.

PROCEDE DE FABRICATION D'OBJETS EN NITRURE DE SILICIUM

L'INVENTION EST RELATIVE A LA FABRICATION D'OBJETS EN NITRURE DE SILICIUM. DANS UN PROCEDE DE FABRICATION D'OBJETS EN NITRURE DE SILICIUM PAR COMPRESSION ISOSTATIQUE D'UN CORPS PREFORME D'UNE POUDRE DE NITRURE DE SILICIUM AVEC UN MILIEU SOUS PRESSION GAZEUX, CE CORPS PREFORME ETANT ENTOURE PAR UNE ENCEINTE PERMEABLE AUX GAZ, QUI EST TRANSFORMEE EN UNE ENCEINTE IMPERMEABLE AU MILIEU DE PRESSION, L'ENCEINTE PERMEABLE AUX GAZ 11 EST TRANSFORMEE EN L'ENVELOPPE IMPERMEABLE AU MILIEU DE PRESSION TANDIS QU'ELLE EST EN CONTACT AVEC UN GAZ SOUS PRESSION ET TANDIS QU'UNE PRESSION EST ENTRETENUE DANS CE GAZ SOUS PRESSION, QUI EST AU MOINS AUSSI ELEVEE QUE LA PRESSION PREVALANT SIMULTANEMENT DANS LE GAZ EXISTANT DANS LES PORES DU PRODUIT PREFORME 10. CE PROCEDE PERMET LA FABRICATION D'OBJETS EN NITRURE DE SILICIUM, PRESENTANT DES FORMES COMPLIQUEES.

Procédé pour la fabrication par pressage isostatique d'un corps préformé en une matière métallique ou céramique enrobé dans un matériau vitrifiable.

Un objet de matière céramique ou métallique est fabriqué par pressage isostatique d'un corps préformé à partir d'une poudre de la matière céramique ou métallique. Le corps préformé 10 est enfoui dans du verre, par exemple dans une masse de particules de verre 16, à l'intérieur d'un récipient qui est résistant à la température à laquelle est effectué le frittage de la matière céramique ou métallique, et le verre est transformé en une fusion présentant une surface délimitée par les parois du récipient au-dessous de laquelle se trouve le corps préformé, une pression nécessaire pour le pressage isostatique du corps préformé étant appliquée au moyen d'un agent de pression gazeux sur la fusion.

A METHOD FOR MANUFACTURING A BODY MOULDS OUT OF CERAMIC MATTER

MANUFACTORING PROCESS OF METAL PARTS OF FORM BY METALLURGY OF THE POWDERS

Le procédé suivant l'invention concerne les pièces de forme fabriquées par métallurgie des poudres, qui sont densifiées par compression isostatique à chaud. Le procédé consiste à revêtir une préforme poreuse crue de deux couches de revêtement poreux. La préforme revêtue est chauffée sous vide jusqu'à une température qui provoque la densification de la couche externe qui devient étanche. On effectue alors la compression isostatique à chaud pour densifier la préforme. Le procédé permet, en particulier, de fabriquer des pièces en super-alliages à hautes caractéristiques exemptes de défauts, qui approchent de très près les dimensions désirées, ce qui réduit beaucoup les pertes de métal. The process according to the invention relates to shaped parts manufactured by powder metallurgy, which are densified by hot isostatic compression. The process involves coating a green porous preform with two layers of porous coating. The coated preform is heated under vacuum to a temperature which causes the densification of the outer layer which becomes waterproof. Hot isostatic compression is then carried out to densify the preform. The process makes it possible, in particular, to manufacture parts in superalloys with high characteristics free from defects, which very closely approach the desired dimensions, which greatly reduces metal losses.

PROCESS FOR COMPACTING A POROUS STRUCTURAL MEMBER FOR HOT-ISOSTATIC MOLDING

IMPROVED PROCESS FOR COMPACTING A POROUS STRUCTURAL MEMBER FOR HOT-ISOSTATIC MOLDING ABSTRACT OF THE DISCLOSURE There is disclosed a process for compacting a porous ceramic structural member having a complicated shape and an optional size by encapsulation with material of the same type and capable of sintering and subsequently subjected to hot-isostatic pressing; immersing the preformed body in a suspension of a material of the same type in a solvent but which contains no sintering aid and forming a first encapsulating layer; evaporating the solvent; immersing the thus obtained body in a second suspension of a material in a solvent of the same type capable of sintering and which contains one or more sintering aids, and forming a second encapsulating layer; evaporating the solvent; subjecting the thus obtained body at an elevated temperature in an atmosphere of a protective gas for a sufficient period of time to sinter the same; isostatically compacting the body provided with a tight-sintered surface; and mechanically removing the encapsulating layers.

METHOD FOR MANUFACTURING AN OBJECT OF SILICON NITRIDE

... : Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

PROCEEDED FOR MANUFACTURE BY ISOSTATIC PRESSING Of a BODY PREFORMS IN a MATTER METAL OR CERAMIC COATS IN a VITRIFIABLE MATERIAL

Un objet de matière céramique ou métallique est fabriqué par pressage isostatique d'un corps préformé à partir d'une poudre de la matière céramique ou métallique. Le corps préformé 10 est enfoui dans du verre, par exemple dans une masse de particules de verre 16, à l'intérieur d'un récipient qui est résistant à la température à laquelle est effectué le frittage de la matière céramique ou métallique, et le verre est transformé en une fusion présentant une surface délimitée par les parois du récipient au-dessous de laquelle se trouve le corps préformé, une pression nécessaire pour le pressage isostatique du corps préformé étant appliquée au moyen d'un agent de pression gazeux sur la fusion. An object of ceramic or metallic material is made by isostatic pressing of a preformed body from a powder of the ceramic or metallic material. The preformed body 10 is buried in glass, for example in a mass of glass particles 16, inside a container which is resistant to the temperature at which the sintering of the ceramic or metallic material is carried out, and the glass is transformed into a melt having an area bounded by the walls of the container below which the preformed body is located, a pressure necessary for the isostatic pressing of the preformed body being applied by means of a gaseous pressure agent on the melt .

MANUFACTORING PROCESS Of OBJECTS OUT OF SILICON NITRIDE

Method of manufacturing articles of silicon nitride

Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

Method of manufacturing an article of metallic or ceramic material

A ceramic or metallic article is manufactured by isostatically hot pressing a preformed powder body which is embedded in glass or glass- forming material, for example in a mass of glass particles, in a vessel which is resistant to the temperature at which the sintering of the metallic or ceramic material is to be carried out. The embedding material is then transformed into a melt having a surface limited by the walls of the vessel, below which surface the preformed body is located, and the pressure necessary for the isostatic pressing of the preformed body is then applied on the melt by a gaseous pressure medium. Materials which may be isostatically pressed are Si3N4, silicon aluminium oxynitride, SiC, Fe and Ni based alloys.

ISOSTATIC PRESSING

PRODUCING METAL OR CERAMIC MATERIAL ARTICLES

SETT ATT FRAMSTELLA ETT FOREMAL AV KERAMISKT ELLER METALLISKT MATERIAL

Method of manufacturing a sintered powder body

A shaped body is formed by cold-pressing a powdered material into a desired shape and then providing thereon a surface layer of a material having a lower melting point than the powder of the shaped body. The shaped body is then placed in a furnace connectable to vacuum equipment, wherein the pressure is first lowered to a value lower than atmospheric pressure and then the temperature is increased so that the material of the surface layer melts. Thereafter the body is isostatically hot-pressed under the direct influence of an inert, gaseous pressure medium, the powder particles being thus bound together to high density by pressure sintering.

Verfahren zur Kapselung eines Formkoerpers aus Keramik

Förfarande för inkapsling i glas och/eller keramik av en porös formkropp av reaktionssintrad kiselkeramik

Method of hot pressing using a getter

A method and assembly for producing compacted powder metallurgy articles wherein powdered metal of a composition corresponding to that desired in the article is introduced to a porous mold corresponding generally to the desired configuration of the article, the mold is placed in a container sealed against the atmosphere and having a secondary pressure media in solid, particle form therein and surrounding the mold. This assembly is heated to elevated temperature for compacting and compacted by the application of pressure to the assembly. The improvement of the invention comprises mixing with the secondary pressure media a reactive metal selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, which acts as a getter for impurities, such as oxygen and nitrogen, present in the secondary pressure media. This prevents oxide and nitride formation in the final compacted article.

Method for the manufacture of a molded member from a ceramic material

A method for the manufacturing of a molded member from a ceramic material, including compressing the molded member within an evacuated capsule of a high temperature-resistant glass under a pressure acting thereabout until the molded member attains a non-porous condition. The working materials for the glass capsule are applied to the molded member in a non-vitrified state; and the coated member is subjected to the reaction temperature of the materials under a vacuum until there is formed a cohesive glass layer enveloping the molded member which will constitute the capsule.

Method of manufacturing an object of silicon nitride

A method for manufacturing an object of silicon nitride by isostatic pressing of a preformed body of silicon nitride powder utilizing a pressure medium at a temperature sufficiently high to sinter the silicon nitride. The preformed body is subjected to a degassing operation before isostatic pressing. An inner porous layer of a first material and then an outer porous layer of a second material are applied on the preformed powder body. The inner porous layer is transformable, at a temperature below the sintering temperature for silicon nitride, into a pressure medium impermeable layer. The outer porous layer is also transformable into a pressure medium impermeable layer, but at a temperature which is lower than the temperature when the inner porous layer is converted into its pressure medium impermeable form. Thus, the preformed body is first subjected to a degassing and to a heating to the temperature for transforming the outer porous layer into a pressure medium impermeable layer while ...

METHOD OF MANUFACTURING ARTICLES OR OBJECTS OF SILICON NITRIDE

Process of producing a sintered compact

A process of producing a sintered compact comprises filling a cup with a powdered material to be sintered, putting on an opening of the cup a covering member consisting of a lid and solder so as to permit ventilation between the interior and exterior of the cup to form a cup assembly, applying heat as well as vacuum to the cup assembly to degas the powdered material, melting the solder by the continuation of heat to air-tightly seal the cup with the lid to obtain a closed cup compressible under high pressure at high temperature while maintaining the air-tight seal, and hot-pressing the closed cup to obtain a sintered compact. The covering member may include a porous lid closing the cup and a solder put on the porous lid.

VERFAHREN ZUR HERSTELLUNG EINES GEGENSTANDES AUS SILIZIUMNITRID

SELF-SEALING FLUID DIE

An assembly (10) for consolidating a preformed body (12) from a powder material of metallic and nonmetallic compositions and combinations thereof to form a densified compact (12') of a predetermined density, comprises an outer container mass (20) capable of fluidity in response to predetermined forces and temperatures and which is porous to the flow of gases therethrough at lower temperatures and forces than the predetermined forces and temperatures. The preformed body is encapsulated by an internal medium (22) melting at lower temperatures to form a liquid barrier to gas flow therethrough. Copyright 1997 KIPO ...

VERFAHREN ZUR HERSTELLUNG EINES SINTERKOERPERS MIT HOHER DICHTE.

SELBSTVERSCHLIESSENDE SCHMELZFORM.

SETT ATT FRAMSTELLA ETT FOREMAL AV KISELNITRID

Method for manufacturing an object of silicon nitride

Disclosed is a method for manufacturing an object of silicon nitride. In the method, a body preformed from silicon nitride is surrounded with a casing which is permeable to gas. Upon heating, the casing is transformed into a layer which is impermeable to a pressure medium which is used during isostatic pressing of the preformed body while a pressure outside the casing is maintained which is at least as high as the pressure of the gas which is present in the pores of the preformed product. After the casing has been made impermeable to the pressure medium and the preformed body has been enclosed therein, the isostatic pressing is carried out while the body is simultaneously sintered.

Self-sealing fluid die

A preformed body (l2) from powder material of metallic and nonmetallic compositions and combinations thereof, is consolidated to form a densified compact (l2') of a predetermined density. An outer container mass (20), capable of fluidity in response to predetermined forces and temperatures and which is porous to gases at lesser temperatures and forces than said predetermined force and temperature, surrounds an internal medium (22). The internal medium encapsulates the preformed body (l2) within the container mass (20) and is capable of melting at the lesser temperatures to form a liquid barrier to gas flow therethrough. The internal medium (22) is capable of rapid hermetic sealing during the early stages of preheat. External pressure is applied by a pot die (l6) and ram (l4) to the entire exterior of the container mass (20) to cause the predetermined densification of the preformed body (l2) by hydrostatic pressure.

Container made of a porous material and coated with precious metal nanoparticles and method thereof

A container made of a porous material and coated with precious metal nanoparticles is disclosed. The method of making it includes: adding precious metal nanoparticles and intermedium particles to a solution; maintaining the solution at a first temperature; heating a container body made of a porous material at a second temperature; and immersing the container body in the solution wherein the temperature difference between the first temperature and the second temperature causes the precious metal nanoparticles and intermedium particles to permeate into the pores of the container body. The resultant container has precious metal nanoparticles not only attached to its surface but also within its pores.

METHOD OF MANUFACTURING AN OBJECT OF A POWDERED MATERIAL BY ISOSTATIC PRESSING

A method for the manufacture of objects from powdered material by isostatic or pseudo-isostatic pressing. A porous body (10), with open pores in contact with the external surface(s), is preformed from a powdered material, whereupon at least one layer (11, 12) of a powdered material is applied onto the external surface of the preformed porous body by dipping. The preformed porous body is covered with a casing (13) of glass, or a material which forms glass upon heating, arranged outside the intermediate layer (12). The casing is made impenetrable to the pressure medium by heating, whereupon the preformed body is compacted to an essentially dense body. The pore system of the preformed porous body is evacuated by applying a sub-atmospheric pressure by means of at least one suction cup (21) which is applied on the external surface to be coated in connection with and during the dipping of the body in a slurry (20) of powdered materials included in the layer (11, 12).

SAETT VID ISOSTATISK PRESSNING

PCT No. PCT/SE91/00854 Sec. 371 Date Feb. 10, 1992 Sec. 102(e) Date Feb. 10, 1992 PCT Filed Dec. 12, 1991 PCT Pub. No. WO92/11107 PCT Pub. Date Jul. 9, 1992.A method for the manufacture of objects from powdered material by isostatic or pseudo-isostatic pressing. A porous body (10), with open pores in contact with the external surface(s), is preformed from a powdered material, whereupon at least one layer (11, 12) of a powdered material is applied onto the external surface of the preformed porous body by dipping. The preformed porous body is covered with a casing (13) of glass, or a material which forms glass upon heating, arranged outside the intermediate layer (12). The casing is made impenetrable to the pressure medium by heating, whereupon the preformed body is compacted to an essentially dense body. The pore system of the preformed porous body is evacuated by applying a sub-atmospheric pressure by means of at least one suction cup (21) which is applied on the external surface to be coated in connection with and during the dipping of the body in a slurry (20) of powdered materials included in the layer (11, 12).

SETT ATT FRAMSTELLA ETT FOREMAL AV ETT MATERIAL I FORM AV ETT PULVER GENOM ISOSTATISK PRESSNING AV EN AV PULVRET FORFORMAD KROPP

PREPARATION OF PART FROM METAL POWDER OR CERAMIC POWDER

PURPOSE: To manufacture parts which is relatively complex in a shape, arbitrary in a cross section shape and free from any limitation in wall thickness out of smooth metal powder, ceramic powder or synthetic resin powder. CONSTITUTION: Powder is placed in a mold 13 through which a gas is passed. The mold is formed of a deposited body of ceramic grains and the ceramic grains are bound by the composition of small amount of a binding agent which is approximately and organically formed. The mold 13 has large mechanical strength to support a formed body in a temperature range between a room temperature and a temperature just below a sintering temperature of the powder to form the formed body. The binding agent loses its strength that is, its supporting action in a temperature range where the formed body achieves a sufficient peculiar stability to guarantee the shape by starting a sintering process and the binding agent loses its strength and supporting action by locally or wholly being evaporated ...

PROCESS FOR MANUFACTURING SILICON NITRIDE

FORFARANDE FOR KAPSLING AV EN FORMKROPP AV KERAMIK

MANUFACTURE OF SILICON NITRIDE PRODUCT

SETT ATT FRAMSTELLA ETT FOREMAL AV KISELNITRID

PREFORM COMPRESSION ASSEMBLY AND METHOD

METHOD OF MANUFACTURING AN OBJECT OF A POWDERED MATERIAL BY ISOSTATIC PRESSING

A method for the manufacture of objects from powdered material by isostatic or pseudo-isostatic pressing. A porous body (10), with open pores in contact with the external surface(s), is preformed from a powdered material, whereupon at least one layer (11, 12) of a powdered material is applied onto the external surface of the preformed porous body by dipping. The preformed porous body is covered with a casing (13) of glass, or a material which forms glass upon heating, arranged outside the intermediate layer (12). The casing is made impenetrable to the pressure medium by heating, whereupon the preformed body is compacted to an essentially dense body. The pore system of the preformed porous body is evacuated by applying a sub-atmospheric pressure by means of at least one suction cup (21) which is applied on the external surface to be coated in connection with and during the dipping of the body in a slurry (20) of powdered materials included in the layer (11, 12).

METHOD FOR FORMING TOOLING AND FABRICATING PARTS THEREFROM

A method of forming tooling for fabricating a part made from a metal powder is described herein. The method includes forming a first sheet and second sheet. The first sheet includes a first protrusion defining a first cavity and a first flange extending about the first protrusion. The second sheet includes a second flange. Additionally, the method includes arranging the first sheet and the second sheet to abut together the first flange of the first sheet and the second flange of the second sheet and to define an enclosure. The enclosure includes a void defined between the first cavity of the first sheet and the second sheet. The void has a shape of the part. The method further includes welding together the first flange of the first sheet and the second flange of the second sheet along a portion of the first flange spaced away from the first protrusion. 1. A method of forming tooling for fabricating a part made from a metal powder , comprising:forming a first sheet comprising a first protrusion defining a first cavity and a first flange extending about an entire periphery of the first protrusion;forming a second sheet comprising a second flange;arranging the first sheet and the second sheet adjacently to each other to abut together the first flange of the first sheet and the second flange of the second sheet and to define an enclosure comprising a void defined between the first cavity of the first sheet and the second sheet, the void having a shape of the part; andwelding together the first flange of the first sheet and the second flange of the second sheet along a portion of the first flange spaced away from the first protrusion.2. The method of claim 1 , wherein:the second sheet comprises a second protrusion defining a second cavity;the second flange extends about an entire periphery of the second protrusion;the void is defined between the first cavity of the first sheet and the second cavity of the second sheet; andwelding together the first flange of the first ...

MANUFACTURING METHOD OF RARE-EARTH MAGNET

A manufacturing method of a rare-earth magnet includes: manufacturing a first sealing body by filling a graphite container with a magnetic powder to be a rare-earth magnet material and by sealing the graphite container; manufacturing a sintered body by sintering the first sealing body to manufacture a second sealing body in which the sintered body is accommodated; and manufacturing a rare-earth magnet by performing hot plastic working on the second sealing body to give magnetic anisotropy to the sintered body. 1. A manufacturing method of a rare-earth magnet , comprising:manufacturing a first sealing body by filling a graphite container with a magnetic powder to be a rare-earth magnet material and by sealing the graphite container;manufacturing a sintered body by sintering the first sealing body to manufacture a second sealing body in which the sintered body is accommodated; andmanufacturing a rare-earth magnet by performing hot plastic working on the second sealing body to give magnetic anisotropy to the sintered body.2. The manufacturing method of a rare-earth magnet according to claim 1 , further comprising:manufacturing the first sealing body by inserting an open end of a first graphite container into an open end of a second graphite container after filling the magnetic powder into the first graphite container, whereinthe graphite container is constituted by the first graphite container and the second graphite container,an inside dimension of the second graphite container is larger than an inside dimension of the first graphite container,each of the first graphite container and the second graphite container is a tube-shaped body constituted by a deformed graphite sheet and having a rectangular section or a circular section, andthe tube-shaped body has a closed end provided with a graphite base plate.3. The manufacturing method of a rare-earth magnet according to claim 1 , further comprisingmanufacturing the first sealing body by disposing a graphite top plate on ...

Functionally Graded Metal-Metal Composite Structures

Methods and devices are disclosed for creating a multiple alloy composite structure by forming a three-dimensional arrangement of a first alloy composition in which the three-dimensional arrangement has a substantially open and continuous porosity. The three-dimensional arrangement of the first alloy composition is infused with at least a second alloy composition, where the second alloy composition comprises a shape memory alloy. The three-dimensional arrangement is consolidated into a fully dense solid structure, and the original shape of the second alloy composition is set for reversible transformation. Strain is applied to the fully dense solid structure, which is treated with heat so that the shape memory alloy composition becomes memory activated to recover the original shape. An interwoven composite of the first alloy composition and the memory-activated second alloy composition is thereby formed in the multiple alloy composite structure. 1. A layered bi-metallic composite material , comprising:a three-dimensional interior structure of an interwoven composite of a first alloy composition and a shape memory alloy composition; anda three-dimensional exterior structure surrounding the interior structure, wherein the exterior structure comprises solid walls of the first alloy composition,wherein the bi-metallic composite material has an overall net compressive residual stress field.2. The bi-metallic composite material of claim 1 , wherein the exterior structure is a box structure.3. The bi-metallic composite material of claim 2 , wherein the box structure is a five-sided box structure.4. The bi-metallic composite material of claim 3 , wherein the bi-metallic composite material is configured to be used in structural components in order to reduce propagation of surface cracks in the structural components.5. The bi-metallic composite material of claim 1 , wherein the first alloy composition comprises an open cell metallic cellular structure having a random design or ...

Three-Dimensional Printed Hot Isostatic Pressing Containers and Processes for Making Same

Methods are disclosed for making a hot isostatic pressing container for hot isostatic pressing a powder material to form an article comprising three-dimensionally printing the container from a build powder, the container having a cavity for receiving the powder material and an outer section having an outer surface, the cavity having a surface and being shaped and sized so that hot isostatic pressing the container with the powder material within the cavity results in the production of the article. Methods are also disclosed for making the hot isostatically pressed article using the container. 1202226222026220. A method for making a container () for hot isostatic pressing a powder material to form an article () comprising three-dimensionally printing the container () from a build powder , the container having a cavity () for receiving the powder material and an outer section () having an outer surface , the cavity having a surface and being shaped and sized so that hot isostatic pressing the container () with the powder material within the cavity () results in the production of the article () surrounded by the container ().228202426. The method of claim 1 , wherein the article () has an internal passageway () and the step of three-dimensionally printing the container () includes forming a core () adjacent to the cavity ().342. The method of claim 1 , further comprising the step of sealingly coating at least a portion of the outer surface with at least one layer of a gas-impervious coating ().442. The method of claim 3 , wherein the step of sealingly coating includes applying the gas-impervious coating () by at least one selected from the group consisting of electrolplating and electroless plating.542. The method of claim 3 , wherein the gas-impervious coating () comprises nickel.642. The method of claim 3 , wherein the gas-impervious coating () has a thickness in the range of 60 microns to 100 microns.74220. The method of claim 3 , wherein the step of sealingly ...

Method of manufacture and predicting powder degredation in an additive manufacturing process

A method of additive manufacture involves building a container 8 and a structure by fusing powder 12, 13, 14, such that the container contains the structure and unfused powder. The container 8 may be used in a method for predicting powder degradation in an additive manufacturing process. Containers containing different types of structure may be built to measure the effect of building different types of structures on powder degradation. A structure to be built may be characterised by classes of structural features it contains and information obtained used from building containers used to predict how building the structure will degrade powder.

PM hot-work steel and process for producing it

분말야금으로 제조된 열간가공강은 (중량 퍼센트로) : 0.25-0.45% 탄소, 2.40-4.25% 크롬, 2.50-4.40% 몰리브덴, 0.20-0.95% 바나듐, 2.10-3.90% 코발트, 0.10-0.80% 실리콘, 0.15-0.65% 망간, 나머지는 철과 제조시 혼입될 수 있는 불순물로 구성된다. 상기한 조성으로 장입된 분말은 열간 등방 가압기 내에서 높은 압축 압력과 높은 압축 온도에 동시에 노출된다. Hot-treated steel made of powder metallurgy (in weight percent): 0.25-0.45% carbon, 2.40-4.25% chromium, 2.50-4.40% molybdenum, 0.20-0.95% vanadium, 2.10-3.90% cobalt, 0.10-0.80% silicon , 0.15-0.65% manganese, the remainder being composed of iron and impurities which can be incorporated during manufacture. The powder charged with the above composition is simultaneously exposed to high compression pressure and high compression temperature in a hot isotropic press.

Manufacture of silicon nitride product

Method of the manufacture of sintered products

Composite cermet articles and method of making

Methods for making, methods for using and articles comprising cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding). Preferably, a first region of the cermet comprises a first ceramic component and a prescribed binder content and a second region, juxtaposing or adjoining the first region, of the cermet comprises a second ceramic component and a second binder content less than the prescribed binder content. The multiple region cermets of the present invention may be used in materials processing technology including, for example, compression technology, extrusion, supercritical processing, chemical processing, materials processing, and ultrahigh pressure.

Method of molding green bodies

Methods for making, methods for using and articles including cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding). Preferably, a first region of the cermet includes a first ceramic component and a prescribed binder content and a second region, juxtaposing or adjoining the first region, of the cermet includes a second ceramic component and a second binder content less than the prescribed binder content. The multiple region cermets of the present invention may be used in materials processing technology including, for example, compression technology, extrusion, supercritical processing, chemical processing, materials processing, and ultrahigh pressure.

Method for manufacturing porous metal

(57)【要約】 【課題】 フイルター、吸音板および熱交換器のライン 材料等に利用可能な多孔性金属を金属粉末を利用して簡 単に製造する。 【解決手段】 粉末状の塩と金属粉末の混合物を上記塩 の溶融温度よりは低く、金属粉末の溶融温度よりは高い 温度で加熱して上記金属粉末を溶融させる段階；塩粉末 の間に上記溶融金属が充填されるように上記混合物を加 圧、成形する段階；および上記成形体から塩を溶出させ 最終的に多孔性金属を得る段階を含む多孔性金属の製造 方法が提供される。このような本発明の方法は、製造工 程が簡単であるので、製造原価の低減のみならず、従来 の方法によって製造された製品と比較して気孔率と比表 面積等の面で優れた競争力を確保できる。

Method for manufacturing metal architectured composite by powder sintering

본 발명은 바이오 소재, 항공 우주 소재, 전자 재료, 레저 용품 등 다양한 산업 분야에서 사용될 수 있는 저중량, 고강도, 고기능, 다기능 재료의 구현이 가능한 아키텍쳐드 복합재를 경제적으로 제조할 수 있는 방법을 제공한다. 본 발명에 따른 아키텍쳐드 복합재의 제조방법은, 몰드 내부에 분말과, 상기 분말에 상기 분말을 구성하는 물질의 융점에 비해 높은 융점을 갖는 금속으로 이루어지며 소정 형상으로 이루어진 하나 이상의 강화재를 배치하는 단계; 상기 분말과 강화재를 압축하여 성형체를 만드는 단계; 및 상기 성형체를 가열하여 상기 분말을 소결시키는 단계;를 포함하는 것을 특징으로 한다. The present invention provides a method for economically manufacturing an architectural composite material which can be used in various industrial fields such as bio materials, aerospace materials, electronic materials, and leisure goods, and which can realize low weight, high strength, high performance, and multifunctional materials. A method of manufacturing an architectural composite material according to the present invention includes the steps of placing powder in a mold and one or more reinforcement materials made of a metal having a melting point higher than a melting point of a material constituting the powder and having a predetermined shape, ; Compressing the powder and the reinforcement material to form a formed body; And sintering the powder by heating the molded body.

Patent JPS5620326B2

Patent FR2340918B1

METHOD FOR MAKING A COUNTERFORM AND METHOD FOR MANUFACTURING PARTS OF COMPLEX SHAPE USING SUCH A COUNTER-FORM

METHOD FOR MANUFACTURING A TURBINE STATOR CASTER

Patent FR2208745B1

ASSEMBLY OF A ROTARY CERAMIC ELEMENT WITH A METALLIC ROTATING ELEMENT FOR TURBO-MACHINES, IN PARTICULAR FOR A GAS TURBINE PROPELLER AND DEVICE FOR IMPLEMENTING THE SAME

A.ASSEMBLAGE D'UN ELEMENT ROTATIF EN CERAMIQUE AVEC UN ELEMENT ROTATIF METALLIQUE POUR TURBO-MACHINES, NOTAMMENT POUR PROPULSEUR A TURBINE A GAZ ET DISPOSITIF DE MISE EN OEUVRE. B.CARACTERISE PAR UNE GAINE 4 REALISEE A PARTIR D'UNE TOLE D'ACIER OU BIEN A PARTIR D'UN MATERIAU CERAMIQUE, QUI ENTOURE, EVENTUELLEMENT EN LAISSANT DES ESPACES INTERMEDIAIRES 5, L'ELEMENT ROTATIF EN CERAMIQUE 1, ET QUI COMPORTE EN OUTRE UNE UNITE CONSTITUTIVE CYLINDRIQUE 6, TANDIS QUE LORSQUE CE PROCESSUS HIP EST TERMINE, LA GAINE 4 QUI N'EST PLUS NECESSAIRE Y COMPRIS L'UNITE CONSTITUTIVE CYLINDRIQUE 6 EST SUSCEPTIBLE D'ETRE COMPLETEMENT ENLEVEE. C.L'INVENTION S'APPLIQUE A UN ASSEMBLAGE ROTATIF EN CERAMIQUE AVEC UN ELEMENT ROTATIF METALLIQUE POUR TURBO-MACHINES. A. ASSEMBLY OF A ROTARY CERAMIC ELEMENT WITH A METAL ROTARY ELEMENT FOR TURBO-MACHINES, ESPECIALLY FOR GAS TURBINE THRUSTER AND OPERATING DEVICE. B. CHARACTERIZED BY A SHEATH 4 MADE FROM A STEEL SHEET OR FROM A CERAMIC MATERIAL, WHICH SURROUNDS, POSSIBLY LEAVING INTERMEDIATE SPACES 5, THE ROTARY CERAMIC ELEMENT 1, AND WHICH INCLUDES IN ADDITION TO A 6 CYLINDRICAL CONSTITUTIVE UNIT, WHILE WHEN THIS HIP PROCESS IS COMPLETED, THE SHEATH 4 WHICH IS NO LONGER NECESSARY INCLUDING THE 6 CYLINDRICAL CONSTITUTIVE UNIT IS LIKELY TO BE COMPLETELY REMOVED. C. THE INVENTION APPLIES TO A ROTARY CERAMIC ASSEMBLY WITH A METAL ROTARY ELEMENT FOR TURBO-MACHINES.

Patent FR2208745A1

ASSEMBLY OF A CERAMIC ROTARY ELEMENT WITH A METAL ROTARY ELEMENT FOR TURBO-MACHINES, ESPECIALLY FOR A GAS TURBINE PROPELLER AND DEVICE FOR IMPLEMENTING IT

Mono or multifilament composite billet closure piece.

ISOSTATIC DEVICE FOR MANUFACTURING LONG RODS

Patent FR2205384A1

PROCESS FOR FORMING A COMPACT AGGLOMERATED ELEMENT UNDER HIGH PRESSURE AND TEMPERATURE

PROCESS FOR PRODUCING A METALLURGICAL PIECE

L'invention concerne un procédé de fabrication d'une pièce métallurgique par compaction à chaud de poudre métallique comportant : - une première étape de fabrication d'un conteneur métallique étanche - une deuxième étape de remplissage dudit conteneur par de la poudre métallique - une troisième étape de dégazage du conteneur par mise sous vide - une quatrième étape d'application d'un cycle de montée en température et pression du conteneur étanche rempli de poudre métallique pour la compaction isostatique à chaud, ladite étape de fabrication d'un conteneur métallique consistant à réaliser une structure monolithique creuse. The invention relates to a method for manufacturing a metallurgical piece by hot compaction of metal powder comprising: a first step of manufacturing a sealed metal container; a second step of filling said container with metal powder; degassing step of the container by evacuation - a fourth step of applying a temperature increase cycle and pressure of the sealed container filled with metal powder for hot isostatic compaction, said step of manufacturing a metal container consisting of to realize a hollow monolithic structure.

Process for manufacturing a turbine stator casing

L invention a pour objet un procédé de fabrication de carter de stator de turbine comprenant les opérations consistant à ménager entre les parois des parties (O1, O2, O3, E1, E2) d'un moule, une cavité de forme correspondant à celle de l'enveloppe dudit carter ; solidariser des noyaux solubles (10), à au moins une desdites parties de moule (E1), ces noyaux étant maintenus à distance de la paroi de cette partie de moule et matérialisant des espaces libres que l'on souhaite ménager à l'intérieur de ladite enveloppe ; mettre en place, entre les noyaux (10), des inserts (20) solubles matérialisant des chemins de circulation entre lesdits espaces libres ; remplir ladite cavité avec une poudre d'un alliage métallique (24) ; fritter cette poudre (24) par compression isostatique à chaud ; éliminer les noyaux (10) et les inserts (20) par dissolution ; et extraire l'enveloppe ainsi moulée. Application à la fabrication d'un carter de stator de turbine de turboréacteur d'avion. The invention relates to a turbine stator casing manufacturing process comprising the operations of forming between the walls of the parts (O1, O2, O3, E1, E2) of a mold, a cavity of shape corresponding to that of the casing of said casing; joining soluble cores (10) to at least one of said mold parts (E1), these cores being kept at a distance from the wall of this mold part and embodying free spaces that are to be kept inside the mold part; said envelope; placing, between the cores (10), inserts (20) soluble materializing traffic paths between said free spaces; filling said cavity with a powder of a metal alloy (24); sintering this powder (24) by hot isostatic pressing; removing the cores (10) and the inserts (20) by dissolution; and extract the casing thus molded. Application to the manufacture of an aircraft turbojet turbine stator housing.

Container for hot extrusion of metal powder - with flow-modifying profiling element(s) to improve prod. yield

The container comprises a tubular body, two end covers, a guide cone mounted on the outside of one of the covers, and one or more profiling elements provided on one or both covers. The profiling surface of the element, on the side facing the interior of the container body, has a central region which diverges towards the periphery of the element in a direction opposite to the direction of convergence of the guide cone. The profiling element modifies the flow of the metal powder so that the face of the extruded powder nearest the profiling element has a rectilinear form, resulting in a higher yield of useful extruded metal when the container is machined away.

Method of and appartus for producing a compression product

A method of producing components by compressing powdered material in a hollow die includes the use of a sleeve in the die to reduce the pressure required to remove the product from the die after compression, and to reduce cracking in the product after spring-back upon release of the component. An elastically deformable sleeve having a cylindrical internal surface and conical external surface is inserted into a tapered aperture in a die plate so as to reduce elastically the internal diameter of the sleeve. The component is produced by compressing powdered material in the interior of the sleeve by upper and lower punches. The upper punch is then removed and the sleeve is partially removed with the product from the die, by movement against the direction of the taper. The interior dimension of the sleeve increases elastically and the product is then removed from the sleeve by raising the lower punch.

Shaped metallurgical product and process for its manufacture

A kind of Thin-wall Aluminum Parts Methods of Surface Quality Control

本发明的目的在于提供一种铝合金薄壁零件表面质量控制方法，根据铝合金薄壁零件内表面的形状制备出石墨模具，对石墨模具的表面依次进行镀镍、镀铬形成镀层。本发明通过电镀石墨模具，为石墨模具添加镀层，从而避免了石墨模具表层易掉落石墨微型颗粒的现象；所述镀层可阻止石墨模具在热等静压工艺时，碳元素向铝合金薄壁零件中渗透；保证了成型铝合金薄壁零件内表面的质量和表面光滑度，使得加工的零件具有较高的精度，保证该零件与其他零件的完美配合。

Container to press powder into blank (versions) and method to optimise material usage during hot isostatic pressing (versions)

FIELD: metallurgy. SUBSTANCE: method and container (201, 301) ensure the regulation of container (201, 301) deformations under the action of high temperatures and pressures in the course of hot isostatic pressing to produce a blank (206, 306) of specified shape with essentially parallel, convex or concave sides (216). EFFECT: preservation of powder used for a blank and more efficient use of the container for the blank. 10 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК B22F 3/15 (11) (13) 2 538 236 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2010135754/02, 23.08.2010 (24) Дата начала отсчета срока действия патента: 23.08.2010 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): ГОЛЛЕР,Джордж Альберт (US), СТОНИШ,Рэймонд Джозеф (US), ПАРОЛИНИ,Джейсон Роберт (US), ВЕИ,Дэниел И. (US) (43) Дата публикации заявки: 27.02.2012 Бюл. № 6 R U (73) Патентообладатель(и): Дженерал Электрик Компани (US) 24.08.2009 US 12/546,168 (45) Опубликовано: 10.01.2015 Бюл. № 1 A, 15.04.1986. US 4935198 A, 19.06.1990. SU 954188 A, 30.08.1982. RU 2007275 C1, 15.02.1994 2 5 3 8 2 3 6 R U (54) КОНТЕЙНЕР ДЛЯ СПРЕССОВЫВАНИЯ ПОРОШКА В ЗАГОТОВКУ (ВАРИАНТЫ) И СПОСОБ ОПТИМИЗАЦИИ ИСПОЛЬЗОВАНИЯ МАТЕРИАЛА ВО ВРЕМЯ ГОРЯЧЕГО ИЗОСТАТИЧЕСКОГО ПРЕССОВАНИЯ (ВАРИАНТЫ) (57) Реферат: Изобретение относится к области для получения заготовки (206, 306) заданной формирования заготовок с помощью горячего формы с по существу параллельными, выпуклыми изостатического прессования. Способ и контейнер или вогнутыми сторонами (216). При этом (201, 301) обеспечивают регулирование достигается сохранение порошка (305), деформаций контейнера (201, 301) во время используемого для заготовки (206, 306), и более воздействия высоких температур и давлений в эффективное использование контейнера (201, 301) процессе горячего изостатического прессования для заготовки (206, 306). 4 н. и 6 з.п. ф-лы, 7 ил. Стр.: 1 C 2 C 2 Адрес для переписки: 191036, Санкт- ...

A method of connecting a ceramic rotary component to a metallic rotary component for a turbomachine

Process for the after-treatment of powder-metallurgically produced extruded tubes

A PROCESS FOR THE AFTER-TREATMENT OF POWDER-METALLURGICALLY PRODUCED EXTRUDED TUBES ABSTRACT A process for the after-treatment of powder-metallurgically produced extruded tubes of stainless steel or nickel-chromium alloys, pressings initially being produced by introducing into a capsule of thin sheet steel a powder consisting predominantly of spherical particles which have been produced from the required starting material by sputtering and,after the capsule has been closed, the density of the powder is increased to at least about 80% to about 93% of the theoretical density by cold isostatic pressing and the pressings obtained are then extruded into tubes at temperatures around 1200°C using glass as the lubricant and the extruded tubes still surrounded by the capsule are initially treated with aqueous sulphuric acid to remove the glass still present on their surface, subsequently cold-worked by drawing or reciprocating rolling and, after cold-working, are annealed in an oxidising atmosphere until the capsule has been converted into scale to such an extent that a surface free from capsule residues is obtained after pickling with mild pickles.

Manufacture of metal parts

WANT TO MAKE FORM GOODS

PCT No. PCT/SE91/00143 Sec. 371 Date Oct. 30, 1992 Sec. 102(e) Date Oct. 30, 1992 PCT Filed Feb. 25, 1991 PCT Pub. No. WO91/12911 PCT Pub. Date Sep. 5, 1991.This invention relates to a method of manufacturing a plurality of molded parts by the steps of (a) providing a plurality of subelements, at least one of said subelements being formed by compression moulding of a sheet so as to define a plurality of recesses therein; (b) welding said subelements together to provide a deformable composite capsule in which said recesses define an inlet channel communicating with a plurality of moulding chambers for forming a plurality of moulded parts; (c) passing powdered material through said inlet channel in said capsule to fill said plurality of moulding chambers therein; (d) evacuating said capsule and essentially sealing said inlet channel; (e) isostatically compacting said capsule to form an essentially dense body therein comprising a plurality of interconnected moulded parts, and (f) separating said moulded parts from one another and cleaning them away from said inlet channel.

Process for hot pressing metal or alloy powder and application of this process

Patent JPS5226482B2

Method for producing porous metal

Method for encapsulating a molded ceramic member

For encapsulating a ceramic molded member for high-temperature isostatic pressing (HIP), a generally porous coating of glass and/or ceramic is applied on the molded member of ceramic and sintered under a vacuum into a pressure-tight capsule encompassing the molded member.

Process for compacting porous ceramic parts for hot isostatic pressing.

A process for consolidating complicated shaped and porous ceramic parts of any size by capping with sinterable layers of the same kind followed by hot isostatic pressing, comprises the steps of (a) dipping the preformed porous ceramic body in a suspension of a similar kind of material, contg. no sintering aid, in a solvent to form a first capping layer; (b) evaporating the solvent; (c) dipping the resulting body into a second suspension of a similar kind of sinterable material contg. one or more sintering aids, in a solvent, to form a second capping layer; (d) evaporating the solvent; (e) sintering the resulting body in a protective gas atmos. for a suitable period; (f) consolidating the body, which has a compactly sintered surface, by a conventional hot isotactic process and (g) mechanically removing the two capping layers.

CAPSULES AND BLANKS FOR THE EXTRUSION OF ARTICLES, IN PARTICULAR, TUBES, AND METHOD OF MANUFACTURING SUCH CAPSULES AND BLANK

SUR L'ENVELOPPE EXTERIEURE102 DE LA CAPSULE101, ON FORME UN EVASEMENT 103 DIRIGE VERS L'EXTERIEUR ET A L'ENCONTRE DE LA CONTRACTION SE PRODUISANT LORS DE LA COMPRESSION ISOSTATIQUE, CET EVASEMENT ETANT CALCULE POUR ETRE ELIMINE COMPLETEMENT PAR CETTE CONTRACTION. SUR LA FACE AVANT ETOU LA FACE ARRIERE DE LA CAPSULE101, ON PREVOIT UNE PIECE RAPPORTEE130, 140 MOULEE EN UNE MATIERE PLEINE ETOU EN POUDRE. L'INVENTION EST UTILISEE POUR L'EXTRUSION D'ARTICLES METALLIQUES ALLONGES TELS QUE DES TUBES EN ACIERS RESISTANT A LA CHALEUR POUR ECHANGEURS DE CHALEUR.

Device for degassing and vacuuming powder before pressing

Method to produce turbine stator case

FIELD: process engineering, engines and pumps. SUBSTANCE: proposed method consists in making a cavity between mould parts walls made of at least two parts and repeating the shape of stator case. Cores made from soluble material are rigidly jointed to at least one part of said mould, and held at a distance from aforesaid wall to mate free spaces to be made inside the case. Said cavity is filled with metal alloy powder to be sintered by hot isostatic moulding. Rods are removed by dissolution and the case, thus produced, is removed from mould. EFFECT: higher accuracy and strength. 11 cl, 3 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 377 422 (13) C2 (51) МПК F01D 25/24 (2006.01) B22F 5/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2005118390/06, 14.06.2005 (24) Дата начала отсчета срока действия патента: 14.06.2005 (73) Патентообладатель(и): СНЕКМА (FR) (43) Дата публикации заявки: 20.12.2006 2 3 7 7 4 2 2 (45) Опубликовано: 27.12.2009 Бюл. № 36 Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Е.И.Емельянову R U 2 3 7 7 4 2 2 (54) СПОСОБ ИЗГОТОВЛЕНИЯ КАРТЕРА СТАТОРА ТУРБИНЫ свободным пространствам, которые необходимо оставить внутри кожуха. Заполняют полость порошком металлического сплава. Спекают порошок горячим изостатическим прессованием. Удаляют сердечники путем растворения и извлекают сформованный таким образом кожух из формы. Изобретение позволяет повысить точность изготовления картера турбины, а также его прочностные свойства. 10 з.п. ф-лы, 3 ил. Ñòð.: 1 ru C 2 C 2 (56) Список документов, цитированных в отчете о поиске: JP 2003-148110 А, 21.05.2003. US 4383854 А, 17.05.1983. RU 2055697 С1, 10.03.1996. RU 2016701 С1, 30.07.1994. SU 880630 А1, 15.11.1981. RU 94041838 А1, 20.09.1996. (57) Реферат: Способ изготовления картера статора турбины, содержащего кожух, заключается в том, что между стенками ...

KEEP CONSOLIDATING A METAL POWDER BODY

PCT No. PCT/SE87/00429 Sec. 371 Date Apr. 11, 1989 Sec. 102(e) Date Apr. 11, 1989 PCT Filed Sep. 24, 1987 PCT Pub. No. WO88/03449 PCT Pub. Date May 19, 1988.This invention relates to a method to consolidate a metal powder body to a completely dense body, in which a plate capsule consisting of a cylindrical wall and in one end thereof an end plate is charged with said powder so that the powder completely or essentially completely will fill the capsule, whereafter the air optionally is evacuated from the capsule and optionally replaced with a non-oxidizing protective gas, said capsule thereafter being closed also in the opposite end by an end plaate, whereafter the capsule with its content is heated to a forging temperature suitable for the metal powder and is forged so that the powder is consolidated to a completely dense body.

CAPSULES AND PSTIGLIE FOR EXTRUDING OBJECTS, IN PARTICULAR TUBES, AND PROCEDURE FOR THE PRODUCTION OF THESE CAPSULES AND OF THESE PSTIGLIE

Method of manufacturing mouldings

A method of manufacturing mouldings by isostatically compacting powdered material in a deformable capsule. The capsule is assembled from preformed sub-elements, is filled with powdered material, is evacuated, is essentially gas-tightly sealed and the capsule containing the powdered material is isostatically compacted into an essentially dense body. The invention is characterized in that at least one sub-element (21) is preformed by compression moulding of thin sheet with recesses (22) and that the sub-elements are joined together, by means of welding, into a capsule (20), wherein, after the joining, at least one of the recesses in the preformed sub-element forms a mould (23) for a moulding part and at least one additional recess in the preformed sub-element forms an inlet channel (24) for the powdered material.

Method of manufacturing articles from silicon nitride

Powder metallurgy hot-worked steel and method for producing the same

(57)【要約】 重量％で、炭素0.25-0.45、クローム2.40−4.25、モリブデン2.50−4.40、バナジウム0.20−0.95、コバルト2.10−3.90、シリコン0.10−0.80、マンガン0.15−0.65を含み、残部が鉄と製造工程からの不純物からなる粉末冶金法により製造された熱間加工鋼。上述した組成の粉末チャージは熱間静水圧プレス中で高い固め圧力と高い固め温度に同時に晒される。

KAPSLAR FOER PRESSADE FOEREMAOL FOER EXTRUDERANDE AV FOEREMAOLSPECIELLT ROER

Capsule for hot isostatic pressing

A capsule (2) for HIPing comprises a rigid, self-supporting additive manufactured (AM) component (3) which is welded to inner and outer cylindrical liners (4, 6) through which cooling channel tubes (8, 10) extend. A solid end plate (11) is welded to ends of the liners (4, 6) and tubes (8, 10) extend through the end plate (11) and open to the outside.A fill tube (12) communicates with an annular void (14) defined between liners (4, 6) which is filled with powder (16). In use, the capsule (2) is subjected to Hot Isostatic Pressing (HIP).Thereafter, the inner and outer liners (4,6) are removed to define a valve seat assembly comprising the AM component (3), tubes (8, 10), HIPed powder (16) and end plate (11).

Capsule for pressing pipes from powder materials

A casing for isostatically pressed pieces, which are intended for the extrusion of metal articles, in particular stainless steel metal pipes. The outer and inner envelopes (302, 304) of the casing (301) are comprised of a thin metal sheet: the outer envelope (302) at least has, along the periphery thereof, resistance characteristic substantially uniform in the axial direction and it consists of, in particular, a spiral welded pipe and is provided, preferably, with a bulge directed outwardly, opposed to the narrowing. It is provided, at least at the front part of the casing an intermediary piece which is made of one or several parts; this piece is obtained from ductile material or from a material obtained by compression of a powder. It is also provided a method for producing such casings and pressed pieces and a method for the extrusion of pipes as well as pipes obtained by such method.

Annular casings and process for the production of tubes by powder metallurgy and process for the manufacturing of such casings.

A casing for isostatically pressed pieces, which are intended for the extrusion of metal articles, in particular stainless steel metal pipes. The outer and inner envelopes (302, 304) of the casing (301) are comprised of a thin metal sheet: the outer envelope (302) at least has, along the periphery thereof, resistance characteristic substantially uniform in the axial direction and it consists of, in particular, a spiral welded pipe and is provided, preferably, with a bulge directed outwardly, opposed to the narrowing. It is provided, at least at the front part of the casing an intermediary piece which is made of one or several parts this piece is obtained from ductile material or from a material obtained by compression of a powder. It is also provided a method for producing such casings and pressed pieces and a method for the extrusion of pipes as well as pipes obtained by such method.

Method for working a metal slug, sleeve for implementing the method and sleeve and lid assembly for implementing the method

用于加工圆柱形的且覆有涂层的金属毛坯(1)的镦锻方法，其特征在于：毛坯(1)竖着放入套筒(2)中，所述套筒(2)的内壁与所述毛坯(1)的侧面具有空间，所述毛坯(1)和套筒(2)套件(9)放在镦锻容器(10)中，镦锻力至少从其一个横切面施加到所述毛坯(1)上，直至获得预定的长细比，把所述毛坯(1)从所述套筒(2)中分离出来。通过本发明，所述毛坯被连续地镦锻，但仅仅所述毛坯被镦锻，因为所述套筒的内壁形成的空间，就允许这样作。所述套筒材料，如由钢制成，与所述毛坯不熔焊在一起或卡在一起，这意味着，不需要在操作后还需用机加工来把这两部分分离开。

Method for producing a countermould and method for manufacturing a part with a complex shape using such a countermould

本发明涉及一种通过加压烧结致密化生产用于制造复杂形状部件(24)的反模板的方法。反模板(20)由通过数字控制的三维(3D)增材打印根据以下步骤所生产的连续层来形成：‑在三维增材打印系统的控制单元中数字地记录待生产的部件(24)的三维负片以便建构待生产的反模板的正形式；‑通过3D增材打印技术生产反模板(20)。具有复杂形状部件(24d)接着通过加压烧结所制造，然后从也被进行烧结的反模板(20d)中分离。

Method of manufacturing an object of a powdered material by isostatic pressing

A method for the manufacture of objects from powdered material by isostatic or pseudo-isostatic pressing. A porous body (10), with open pores in contact with the external surface(s), is preformed from a powdered material, whereupon at least one layer (11, 12) of a powdered material is applied onto the external surface of the preformed porous body by dipping. The preformed porous body is covered with a casing (13) of glass, or a material which forms glass upon heating, arranged outside the intermediate layer (12). The casing is made impenetrable to the pressure medium by heating, whereupon the preformed body is compacted to an essentially dense body. The pore system of the preformed porous body is evacuated by applying a sub-atmospheric pressure by means of at least one suction cup (21) which is applied on the external surface to be coated in connection with and during the dipping of the body in a slurry (20) of powdered materials included in the layer (11, 12).

Process for producing a near net shape component with consolidation of a metallic powder

A process of producing an article and an article made are provided. The process includes producing a near-net shape component. The process includes forming a consolidation shell by additive manufacturing. The consolidation shell defines an interior space having a geometry corresponding to a component. A metallic powder is provided to the interior space. Gas is removed from the interior space. The metallic powder is consolidated in the consolidation shell under sufficient heat and pressure to form the near-net shape component.

METHOD FOR CORROCING A METAL LOPIN, SHAPED FOR IMPLEMENTING THE METHOD AND ASSEMBLY OF A SHIRT AND A COVER FOR IMPLEMENTING THE METHOD

Le procédé de l'invention, de refoulage pour le corroyage d'un lopin métallique (1), de forme cylindrique et pourvu d'un revêtement, est caractérisé par le fait qu'on place le lopin (1), dans le sens de la longueur, dans une chemise (2) dont la paroi interne ménage un espace avec la surface latérale du lopin (1), on place l'ensemble (9), du lopin (1) et de la chemise (2), dans un pot de refoulage (10), on exerce une force de refoulage sur le lopin (1) sur au moins une de ses surfaces transversales, jusqu'à ce qu'un élancement déterminé soit obtenu, et on sépare le lopin (1) de la chemise (2).Grâce à l'invention, le refoulage du lopin se fait de manière contenue, mais seul le lopin est refoulé, ce qui est autorisé par l'espace ménagé par la paroi interne de la chemise. Le matériau de la chemise, par exemple en acier, n'est pas soudé ou grippé avec le lopin, ce qui évite de l'usiner pour les séparer après l'opération. The method of the invention, upset for the roughing of a metal slug (1), of cylindrical shape and provided with a coating, is characterized by the fact that the slug (1), in the direction of the length, in a jacket (2) whose internal wall provides a space with the lateral surface of the billet (1), the assembly (9), the billet (1) and the jacket (2) are placed in a crushing pot (10), a pushing force is exerted on the billet (1) on at least one of its transverse surfaces, until a determined slenderness is obtained, and the slug (1) is separated from the shirt (2) .Grâce the invention, the repressing of the billet is contained, but only the piece is repressed, which is allowed by the space provided by the inner wall of the shirt. The material of the jacket, for example steel, is not welded or seized with the billet, which avoids machining to separate them after the operation.

Method of manufacturing an object of a powdered material by isostatic pressing

요약없음 No summary

Process for manufacturing a turbine stator casing

L invention a pour objet un procédé de fabrication de carter de stator de turbine comprenant les opérations consistant à ménager entre les parois des parties (O1, O2, O3, E1, E2) d'un moule, une cavité de forme correspondant à celle de l'enveloppe dudit carter ; solidariser des noyaux solubles (10), à au moins une desdites parties de moule (E1), ces noyaux étant maintenus à distance de la paroi de cette partie de moule et matérialisant des espaces libres que l'on souhaite ménager à l'intérieur de ladite enveloppe ; mettre en place, entre les noyaux (10), des inserts (20) solubles matérialisant des chemins de circulation entre lesdits espaces libres ; remplir ladite cavité avec une poudre d'un alliage métallique (24) ; fritter cette poudre (24) par compression isostatique à chaud ; éliminer les noyaux (10) et les inserts (20) par dissolution ; et extraire l'enveloppe ainsi moulée. Application à la fabrication d'un carter de stator de turbine de turboréacteur d'avion.

Patent JPS551323B2

Method for isostatic or pseudo-isostatic pressing of a material

PCT No. PCT/SE91/00854 Sec. 371 Date Feb. 10, 1992 Sec. 102(e) Date Feb. 10, 1992 PCT Filed Dec. 12, 1991 PCT Pub. No. WO92/11107 PCT Pub. Date Jul. 9, 1992.A method for the manufacture of objects from powdered material by isostatic or pseudo-isostatic pressing. A porous body (10), with open pores in contact with the external surface(s), is preformed from a powdered material, whereupon at least one layer (11, 12) of a powdered material is applied onto the external surface of the preformed porous body by dipping. The preformed porous body is covered with a casing (13) of glass, or a material which forms glass upon heating, arranged outside the intermediate layer (12). The casing is made impenetrable to the pressure medium by heating, whereupon the preformed body is compacted to an essentially dense body. The pore system of the preformed porous body is evacuated by applying a sub-atmospheric pressure by means of at least one suction cup (21) which is applied on the external surface to be coated in connection with and during the dipping of the body in a slurry (20) of powdered materials included in the layer (11, 12).

Process for preparing a turbine stator casing

Production method with additive component manufacture and finishing

Die Erfindung betrifft ein Verfahren zur Herstellung von Bauteilen, mit den Schritten: a) Herstellen eines Bauteilrohlings in einem additiven Herstellungsverfahren, umfassend: a1) Bestimmen von auszuhärtenden Bauteilbereichen des Bauteilrohlings in einem elektronischen Planungsvorgang und Erzeugen eines Bauteilrohlingsdatensatzes (1), der die auszuhärtenden Bauteilbereiche definiert, a2) Anordnen eines Ausgangsmaterials und selektives Aushärten und Fügen des Ausgangsmaterial in den auszuhärtenden Bauteilbereichen anhand des Bauteilrohlingsdatensatzes zu dem Bauteilrohling (2), wobei das Aushärten und Fügen des Ausgangsmaterials anhand des Bauteilrohlingsdatensatzes so erfolgt, dass der Bauteilrohling eine Bauteilrohlingsdichte aufweist, die kleiner als 99,5% der theoretisch mit dem Ausgangsmaterial erreichbaren Dichte ist, b) Verdichten und Verfestigen des Bauteilrohlings zu einem Bauteil in einem heißisosstatischem Pressverfahren (7), bei dem der Bauteilrohling in einer Ofenkammer auf eine Temperatur unterhalb der Schmelztemperatur des Ausgangsmaterial erhitzt wird und durch Erzeugen eines Überdrucks in der Ofenkammer mittels eines Ofenkammerdrucks von mindestens 50 bar gepresst wird. The invention relates to a method for manufacturing components, with the following steps: a) Manufacturing a component blank in an additive manufacturing process, comprising: a1) Determining component areas of the component blank to be cured in an electronic planning process and generating a component blank data set (1) that identifies the component areas to be hardened defined, a2) arranging a starting material and selective curing and joining of the starting material in the component areas to be cured on the basis of the component blank data set for the component blank (2), the curing and joining of the starting material taking place on the basis of the component blank data set so that the component blank has a component blank density that is smaller than 99.5% of the density ...

Method of machining, sleeve to this end and assembly comprising said sleeve and cover to this effect

FIELD: process engineering. SUBSTANCE: invention relates to metal forming and can be used in machining cylindrical parts by hot upsetting. Upsetting fore is applied to heated billet to produce preset length-to-diametre ratio. Here upsetting sleeve and vessel are used. Billet is arranged inside the sleeve to provide clearance between billet side surface and sleeve wall. Assembly made up of sleeve with billet is arranged in the vessel for upsetting force to be applied to at least one crosswise surface of heated billet. Upset billet is removed from the sleeve. Sleeve features cylindrical lateral and end walls. End wall has recess to center the billet and preliminary forming of its ends. Billet is closed inside the sleeve by cover made in the form of round plate. Plate cross section equals or is smaller than sleeve cross section. EFFECT: higher quality, reduced labor and material input. 15 cl, 4 dwg

Process of producing a sintered compact

ABSTRACT OF THE DISCLOSURE A process of producing a sintered compact comprises filling a cup with a powdered material to be sintered, putting on an opening of the cup a covering member consisting of a lid and solder so as to permit ventilation between the interior and exterior of the cup to form a cup assembly, applying heat as well as vacuum to the cup assembly to degas the powdered material, melting the solder by the continuation of heating to air-tightly seal the cup with the lid to obtain a closed cup compressible under high pressure at high temperature while maintaining the air-tight seal, and hot-pressing the closed cup to obtain a sintered compact. The covering member may include a porous lid closing the cup and a solder put on the porous lid.

METHOD AND APPARATUS TO PRODUCE A PRODUCT BY COMPRESSION.

UN METODO DE PRODUCCION DE COMPONENTES (15) MEDIANTE LA COMPRESION DE UN MATERIAL EN POLVO EN UN MOLDE HUECO (12) INCLUYE EL USO DE UN MANGUITO (16) EN EL MOLDE PARA REDUCIR LA PRESION REQUERIDA PARA QUITAR EL PRODUCTO (15) DEL MOLDE (12) DESPUES DE LA COMPRESION, Y PARA REDUCIR LA DESCOMPOSICION TERMICA EN EL PRODUCTO DESPUES DE LA DEFORMACION RESIDUAL EN LA LIBERACION DEL COMPONENTE. UN MANGUITO ELASTICAMENTE DEFORMABLE (16) QUE TIENE UNA SUPERFICIE INTERNA CILINDRICA Y UNA SUPERFICIE EXTERNA CONICA SE INSERTA EN UNA APERTURA CONICA EN UNA PLACA MOLDE (12) PARA REDUCIR ELASTICAMENTE EL DIAMETRO INTERNO DEL MANGUITO. EL COMPONENTE SE PRODUCE MEDIANTE LA COMPRESION DEL MATERIAL EN POLVO EN EL INTERIOR DEL MANGUITO MEDIANTE TROQUELES SUPERIOR E INFERIORES (13, 14). EL TROQUEL SUPERIOR (13) ES ENTONCES RETIRADO Y EL MANGUITO (16) ES PARCIALMENTE RETIRADO CON EL PRODUCTO (15) DEL MOLDE (12), MEDIANTE UN MOVIMIENTO CONTRA LA DIRECCION CONICA. LA DIMENSION INTERIOR DEL MANGUITO (16) AUMENTA ELASTICAMENTE Y EL PRODUCTO (15) ES ENTONCES RETIRADO DEL MANGUITO LEVANTANDO EL TROQUEL INFERIOR (14). A COMPONENT PRODUCTION METHOD (15) BY COMPRESSING A POWDERED MATERIAL IN A HOLLOW MOLD (12) INCLUDES THE USE OF A SLEEVE (16) IN THE MOLD TO REDUCE THE PRESSURE REQUIRED TO REMOVE THE PRODUCT (15) FROM THE MOLD (12) AFTER COMPRESSION, AND TO REDUCE THERMAL DECOMPOSITION IN THE PRODUCT AFTER RESIDUAL DEFORMATION IN THE RELEASE OF THE COMPONENT. AN ELASTICALLY DEFORMABLE SLEEVE (16) THAT HAS AN INTERNAL CYLINDRICAL SURFACE AND AN EXTERNAL CONICAL SURFACE IS INSERTED IN A CONICAL OPENING IN A MOLDING PLATE (12) TO ELASTICALLY REDUCE THE INTERNAL DIAMETER OF THE SLEEVE. THE COMPONENT IS PRODUCED THROUGH COMPRESSION OF THE POWDERED MATERIAL INSIDE THE SLEEVE THROUGH UPPER AND LOWER DIES (13, 14). THE UPPER DIE (13) IS THEN REMOVED AND THE SLEEVE (16) IS PARTIALLY REMOVED WITH THE PRODUCT (15) FROM THE MOLD (12), THROUGH A MOVEMENT AGAINST THE CONICAL DIRECTION. THE INNER DIMENSION OF THE ...

Static or pseudo-static compression method

Hot working of metal powders

Metal powders are hot isostatically pressed in a can or container produced from superplastic metal sheet.

METHOD AND DEVICE FOR PRODUCING A POWDER WORKPIECE BY ISOSTATIC PRESSING

Method for encapsulating material to be processed by hot or warm isostatic pressing

내용 없음.

Metallic shell for the production of extrusion billets for the powder metallurgical production of pipes

Device for the production of composite bodies

Process for the production of a neutron shielding material

Composite forged part and manufacturing method thereof

Method of forming powdered metal articles

In forming an article, such as a turbine blade, of metal powder, a container (22) is first formed by electroplating a thin layer of metal over a pattern having a configuration which corresponds to the configuration of the article. The pattern is then removed to leave a container having a cavity with a configuration corresponding to the configuration of the article. The container is filled with metal powder and sealed. The container is then at least partially enclosed with a rigid body (32) of fluid permeable material having inner side surface areas disposed in abutting engagement with the container. Heat and fluid pressure are transmitted through the rigid body to compact the container and metal powder. The fluid pressure causes the side walls of the container to move away from the inner side surfaces of the rigid body of fluid permeable material. As this is occurring, the rigid body of fluid permeable material supports the container and holds it against excessive deflection under the influence of stresses induced in the container.

Method and apparatus for compacting powder materials

Powder metallurgy method for making shaped articles and product thereof

ABSTRACT A shaped article is provided having a composite structure made up primarily of substrate which can be cold worked, if at all, only with a disproportionate amount of scrap and a cladding which is compatible with and highly ductile relative to the substrate and which at least during forming, particularly cold rolling, is thick enough and adherent to permit substantial reductions without exposing the hard-to-work substrate. The article is made by filling a container with prealloyed metal powder having the composition desired in the substrate including an ingredient which makes it hard to work. The container has a compatible composition, the substrate composition without the hard-to-work ingredient being illustrated. The container is then sealed, hot compacted, hot rolled and then cold rolled to final thickness to provide a shaped article having a substrate of the hard-to-work composi-tion with an integral cladding metallurgically bonded thereto. In an example, the substrate is made of type 304 stainless steel with 1.75% boron and the cladding is type 304 without a boron addition.

Containment for hot isostatic pressing and vacuum degassing apparatus

A containment for use in hot Isostatic pressing, the containment comprising a body formed from sheet material and fused together along its longitudinal length using a backing strip on the outside of body. Also a containment with a body and top and bottom caps diffusion bonded upon hot isostatic pressing, a containment with a gas purge inlet and outlet and an apparatus for vacuum degassing are disclosed.

Process for hot working of metallic powder

PROCESS FOR PRODUCING METALLIC PARTS BY MOLDING AND SINKING A METALLIC ALLOY POWDER

PROCEDE DE FABRICATION DE PIECES METALLIQUES PAR MOULAGE ET FRITTAGE D'UNE POUDRE D'ALLIAGE METALLIQUE, DU GENRE COMPRENANT DEUX PHASES, A SAVOIR UNE PHASE DE CONFORMATION AU COURS DE LAQUELLE UNE CHARGE DE POUDRE EST CHAUFFEE DANS UN MOULE DE FORME POUR REALISER UNE PREFORME 20 RIGIDE ET POREUSE ET UNE PHASE COMPACTAGE ET DE FRITTAGE AU COURS DE LAQUELLE LA PREFORME EST CHAUFFEE SOUS UNE PRESSION ISOSTATIQUE. LEDIT PROCEDE EST CARACTERISE EN CE QUE LA PHASE DE CONFORMATION EST CONDUITE DE TELLE SORTE QUE LA PREFORME 20 EST A PORES OUVERTS ET EN CE QUE LA PRESSION ISOSTATIQUE EST APPLIQUEE PAR L'INTERMEDIAIRE D'UNE ENVELOPPE 30 DEFORMABLE ETANCHE. LEDIT PROCEDE S'APPLIQUE AVANTAGEUSEMENT A LA REALISATION DE PIECES DE FORME COMPLIQUEE EN SUPERALLIAGE OU EN ALLIAGE DE TITANE. METHOD OF MANUFACTURING METAL PARTS BY MOLDING AND SINTING OF A METAL ALLOY POWDER, OF THE KIND COMPRISING TWO PHASES, namely A CONFORMATION PHASE DURING WHICH A POWDER LOAD IS HEATED IN A FORMED MOLD TO PREFORM A 20 RIGID AND POROUS AND A COMPACTION AND SINTERING PHASE IN WHICH THE PREFORM IS HEATED UNDER ISOSTATIC PRESSURE. THIS PROCEDURE IS CHARACTERIZED IN THAT THE CONFORMATION PHASE IS CONDUCTED SO THAT THE PREFORM 20 IS WITH OPEN DOORS AND IN THAT THE ISOSTATIC PRESSURE IS APPLIED THROUGH A SEALED DEFORMABLE ENCLOSURE 30. THIS PROCEDURE APPLIES ADVANTAGEALLY TO THE REALIZATION OF PARTS OF COMPLICATED SHAPE IN SUPERALLY OR TITANIUM ALLOY.

Formable Sealant Barrier

In one embodiment of the present invention, an assembly for HPHT processing comprises a can with an opening. A powder mixture is disposed within the opening. A substrate is disposed within the opening adjacent the powder mixture. Paint is coated on a surface within the opening and opposite the powder mixture with respect to the substrate. A meltable sealant is disposed within the opening and opposite the substrate with respect to the surface and a cap is covering the opening. In another embodiment of the present invention, an assembly for HPHT processing comprises a can with an opening, a powder mixture is disposed within the opening, a substrate disposed within the opening adjacent and above the powder mixture, a formable sealant barrier is disposed within the opening above the substrate, a meltable sealant is disposed within the opening above the formable sealant barrier, and a cap covers the opening.