COATING PROCESS

VERFAHREN ZUR STABILISIERUNG DER VISKOSITAET UND ZUR ERHOEHUNG DER KONZENTRATION EINER WAESSRIGEN MAGNESIAAUFSCHLAEMMUNG

Improved coatings for titanium bodies

... 1,127,566. Enamels and enamelling. CONTIMET G.m.b.H. 24 May, 1967, No. 24230/67. Addition.to 1,075,887. Heading C1M. [Also in Division B2] A titanium or titanium base alloy body has a surface coating which essentially consists of potassium silicate and finely divided, aluminium and is such as: form an effective glaze when working the body at temperatures of the order of 1800‹ to 2400‹ F. The body has a. surface coating to protect the surface from atmospheric oxidation during heat treatment thereof, the coating being formed by application of an intimate mixture consisting essentially of (a) from 3 to 6 parts by weight of an aqueous solution of potassium silicate which may have a viscosity of 30 to 40 degrees BÚ, (b) 3 to 8 parts by weight of aluminium powder, and (c) from ¢ to 2 parts by weight of sand; theaqueous solution, may be present in a. proportion of from. 1 : 1 to 1 : 2À5 of the sand.

METHOD FOR FORMING A COATED MOLYBDENUM SCREEN

... 1311000 Coated molybdenum screen AMERICAN METAL CLIMAX Inc 13 Oct 1970 [14 Oct 1969] 9534/71 Divided out of 1310999 Heading B2E A coated molybdenum screen for use in pouring cast iron is produced by forming a mixture of alumina and silica and a sodium hydroxide solution, applying the mixture to the molybdenum screen whereby the sodium hydroxide will etch the molybdenum drying the liquid from the coated screen and heating the coated screen to fuse the remaining coating material. As shown in Fig. 1, a coated screen 25 comprises a molybdenum screen formed with openings 26 defined by strands 27 of molybdenum having a coating deposited upon the strands 27 and completely enclosing the strands while retaining the openings 26. Preferably the coating is ceramic and comprises 80% alumina and 20% silica applied from a mixture containing 58% alumina-silica and 42% sodium hydroxide solution. The coating may be subsequently fused.

PROCESSING FOR ALUMINUM NITRIDE INHIBITED ORIENTED SILICON STEEL

... 1526520 Heat-treating silicon steel ALLEGHENY LUDLUM INDUSTRIES Inc 7 Sept 1976 [8 Sept 1975] 36996/76 Headings C7A and C7N In a process for producing silicon steel with a cube-on-edge orientation and a permeability of at least 1850 G/Oe at 10 Oe a material containing in wt. per cent C -0À07 Si 2À8 -4 Mn 0À03 -0À24 S and/or Se 0À01 -0À09 Al 0À015-0À04 N -0À02 Cu -0À5 B -0À0035 is cast, hot-rolled, cold-rolled with a reduction of at least 75% decarburization annealed, and finally texture annealed while coated with a composition consisting of 100 parts wt. per cent in total of one or more of boron, boron compounds, sulphur, sulphur compounds, selenium, selenium compounds, or oxides or hydroxides of Mg, Ca, Al, Ti, or Mn together with 4 to 120 parts wt. per cent of at least one amide and/or amide of an organic or inorganic acid. Preferred compositions include magnesium oxide and/or hydroxide with 10-40 parts of urea or sulphanic acid.

PROCEDURE FOR THE PRODUCTION OF ELECTROMAGNETIC SILICON STEEL AS WELL AS COMPOSITION FOR THE USE WITH THE PROCEDURE MENTIONED

PROCEDURE FOR THE PRODUCTION OF AN ELECTROMAGNETIC SILICON STEEL WITH POURING TEXTURE

VERFAHREN ZUR HERSTELLUNG VON ELEKTRO- MAGNETISCHEM SILICIUMSTAHL SOWIE ZUSAMMEN- SETZUNG FUER DIE VERWENDUNG BEI DEM GENANNTEN VERFAHREN

VERFAHREN ZUR HERSTELLUNG EINES ELEKTRO- MAGNETISCHEN SILIZIUMSTAHLES MIT GOS-TEXTUR

VERFAHREN ZUR HERSTELLUNG VON ELEKTRO- MAGNETISCHEN, KORNURIENTIERTEN SILICIUMSTAEHLEN

VARNISHED WIRE HAVING A LOW COEFFICIENT OF FRICTION, AS WELL AS A METHOD FOR PRODUCING SUCH A VARNISHED WIRE

Procedure for the production of the fireproof lining of stealing or hot-metal ladles

BORON BEARING CUBE-ON-EDEGE ORIENTED SILICON STEEL SHEET

METHOD FOR PREVENTING DECARBURIZATION OF STEEL MATERIALS

METHOD FOR PREVENTING DECARBURIZATION OF STEEL MATERIALS

A method for preventing decarburization of a steel material comprising applying a mixture of SiC powder and metallic Al powder on the steel material, then applying an oxidation inhibitor thereon, and heating the thus coated steel material, so as to give 30 to 500 g/m2 SiC on the steel material. The present method is particularly useful for preventing the lowering in strength of steel materials due to the surfacial decarburization.

PROCESSING FOR ALUMINUM NITRIDE INHIBITED ORIENTED SILICON STEEL

PROCESSING FOR ALUMINUM NITRIDE INHIBITED ORIENTED SILICON STEEL A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1850 (G/Oe) at 10 oersteds. The process includes the steps of: preparing an aluminumbearing melt of silicon steel; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; coating the steel with a base coating containing an amide and/or imide of an organic and/or inorganic acid; and final texture annealing the steel.

SILICON STEEL AND PROCESSING THEREFORE

Elektrisch isoliertes, aus einer Silizium-Eisenlegierung bestehendes Blech mit in der Walzrichtung erhöhter Magnetisierbarkeit und Verfahren zur Herstellung desselben.

Sieve for removing impurities from molten

Sieve for removing impurities from molten ferrous metals during casting, is constructed from molybdenum, the mesh bars being readily soluble on the ferrous material at the casting temp., and is the coated with a material of considerably higher melting point than the temp. of the molten ferrous metal, to a sufficient degree to prevent direct contact between the molybdenum and the molten metal.

Sieb zum Abtrennen von Verunreinigungen aus geschmolzenem Gusseisen beim Giessen desselben

Séparateur de recuit pour lames d'acier au silicium à grain orienté.

Un séparateur de recuit utilisable pour produire une lame d'acier au silicium à grain orienté ayant d'excellentes propriétés magnétiques, comprend un oxyde de magnésium non hydratable qui a été grillé à une température de 1 300 degrés C ou plus, de préférence de 1 300 à 2 100 degrés C, et qui se présente sous la forme de fines particules, dont 70 % en poids ont une taille de 5 microns ou moins, et optionnellement, de l'hydroxyde de magnésium dans une proportion de 1 à 100 % rapportée au poids de l'oxyde de magnésium et/ou un composé d'aluminium dans une proportion de 0,05 à 10 % rapportée au poids de l'oxyde de magnésium ...

METHOD FOR PRODUCING COATINGS ON ELECTRICALLY INSULATING SILICON STEEL

DES SELS FONDUS

L'invention a pour objet un matériau de protection de surfaces métalliques contre la corrosion par des sels fondus. Selon l'invention, ce matériau est constitué par une matière céramique présentant un coefficient de dilatation proche du coefficient de dilatation de la surface métallique à protéger. Application à la protection de surfaces métalliques contre la corrosion.

Process for the establishment of refractory brick linings of the ladles for steel and the cast iron

PROCESS OF FORMATION Of a FILM ISOLATING FROM FORSTERITE ON a SHEET ORIENTEE Of STEEL SILICON

PROCESS Of OBTAINING a COATING OF FREEZING Of a REFRACTORY MATTER ON a SUBSTRATE, AND SUBSTRATE OBTAINED

L'invention concerne un procédé pour obtenir un revêtement de gel de matière réfractaire sur un substrat. On met le substrat au contact d'un sol d'une matière réfractaire, pouvant être transformé en un gel de cette matière réfractaire (la densité apparente du gel représentant au moins 40 % de la densité théorique de la matière réfractaire) et l'on transforme le sol en gel par cuisson. Les revêtements obtenus peuvent protéger le substrat (contre une attaque ou des dépôts) ou porter une matière catalytiquement active et déposée ensuite. The invention relates to a method for obtaining a gel coating of refractory material on a substrate. The substrate is placed in contact with a sol of a refractory material, which can be transformed into a gel of this refractory material (the apparent density of the gel representing at least 40% of the theoretical density of the refractory material) and one turns the soil into gel by cooking. The coatings obtained can protect the substrate (against attack or deposits) or carry a catalytically active material and subsequently deposited.

SILICON STEEL AND METHOD FOR ITS TREATMENT

Intermetallic catalysts

A catalyst comprising a substrate having deposited thereon a first coating containing a refractory metal oxide and having deposited upon the said oxide one or more intermetallic compounds of the general formula AxBy where A is selected from the group consisting of Ru, Rh, Pd, Ir and Pt, and B is selected from the group consisting of Al, Sc, Y, the lanthanides, Ti, Zr, Hf, V, Nb, and Ta, and where x and y are integral and may have values of 1 or more.

СПОСОБ ИЗГОТОВЛЕНИЯ ТОРМОЗНОГО ДИСКА И ТОРМОЗНОЙ ДИСК

А 2016119946 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) п 3 < < х < < хх < <® 13 ВИ “° 23015 110 За А (50) МПК 160 65/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016119946, 15.10.2014 (71) Заявитель(и): ФОРД ГЛОУБАЛ ТЕКНОЛОДЖИЗ, Приоритет(ы): | ЭлЭлСи (05) (30) Конвенционный приоритет: 25.10.2013 РЕ 10 2013 221 737.4 (72) Автор(ы): (43) Дата публикации заявки: 27.11.2017 Бюл. № 33 ев а) (85) Дата начала рассмотрения заявки РСТ на ГРАБЕЦ Томаш Павел (ОЕ), национальной фазе: 25.05.2016 ВЕРПОРТ Клеменс Мария (ОЕ) (86) Заявка РСТ: ЕР 2014/072130 (15.10.2014) (87) Публикация заявки РСТ: УГО 2015/059011 (30.04.2015) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ИЗГОТОВЛЕНИЯ ТОРМОЗНОГО ДИСКА И ТОРМОЗНОЙ ДИСК (57) Формула изобретения 1. Способ изготовления тормозного диска (1) для транспортного средства, в котором на основном корпусе (2) тормозного диска (1) расположен защитный слой, содержащий по меньшей мере следующие этапы, на которых осуществляют предварительную машинную обработку по меньшей мере некоторой области или областей основного корпуса (2), находящегося в виде заготовки; наносят эмалевое покрытие (10) на основной корпус (2) по меньшей мере в некоторой области или областях, и осуществляют последующую обработку основного корпуса (2), содержащего покрытие по меньшей мере в некоторой области или областях, при этом эмалевое покрытие (10) металлургически привязано к материалу основы основного корпуса (2) посредством фазообразования. 2. Способ по п.1, в котором эмалевое покрытие (10) является расплавленной смесью, которая содержит стеклообразующие оксиды, а также буру, полевой шпат, кварц, фторид, углекислый натрий, натриевую селитру и замутнители. 3. Способ по п.1 или 2, в котором эмалевое покрытие (10) содержит оксиды кобальта, оксиды марганца и/или оксиды никеля. 4. Способ по одному из предыдущих пунктов, в котором Стр.: 1 па ...

VERFAHREN ZUM AUSBILDEN VON FESTHAFTENDEN UND GLEICHFOERMIGEN ISOLATIONSSCHICHTEN AUF KORNORIENTIERTEM SILICIUMSTAHLBLECH

VERFAHREN ZUM HERSTELLEN ELEKTROMAGNETISCHER SILIZIUMSTAEHLE

PROCEDURE FOR MANUFACTURING ELECTROMAGNETIC SILICON STEELS

PROCEDURE FOR COATING A MOLYBDANSIEBES

Filter for holding back impurities from melted cast iron during pouring

PROCEDURE FOR STRIKING DOWN ALUMINA ON A SUBSTRATE

PROCEDURE FOR THE PRODUCTION OF ELECTRICAL MAGNETIC ONE SILICON STEEL AS WELL AS TOGETHER SETTING FOR THE USE WITH THE PROCEDURE MENTIONED

PROCEDURE FOR MANUFACTURING ELECTROMAGNETIC SILICON STEELS

PROCEDURE FOR THE PRODUCTION OF ELECTRICAL MAGNETIC, KORNURIENTIERTEN SILICON STEEL

ELECTROLYTIC BASE COATING USED IN THE PRODUCTION OF HIGH PERMEABILITY SILICON STEEL

COATINGS

PROCESS FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING BOTH IMPROVED MAGNETIC PROPERTIES AND PROPERTIES OF GLASS FILM

PROCESS FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING BOTH IMPROVED MAGNETIC PROPERTIES AND PROPERTIES OF GLASS FILM The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlorides in a chlorine amount of from 5 to 20% by weight based on 100% of the chloride and antimony sulfate, and occasionally comprises Ti oxide in an amount of from 0.5 to 10 parts. The annealing separator is applied on the decarburization annealed strip, and improves both the magnetic properties and properties of glass film, in the production of a grain-oriented electrical steel sheet.

SILICON STEEL AND PROCESSING THEREFORE

PROCESS OF PRODUCING AN ELECTRICALLY INSULATIVE GLASS FILM ON SILICON STEEL

PROCEDE POUR LA FABRICATION DE REVETEMENTS ELECTRIQUEMENT ISOLANTS SUR DE L'ACIER AU SILICIUM

Procédé pour la fabrication de revêtements électriquement isolants sur de l'acier au silicium. On fabrique une pellicule vitreuse électriquement isolante sur une bande ou une tôle d'acier au silicium laminé à froid, qui possède une perméabilité magnétique supérieure à 1850 à 796 A/m après un recuit final à haute température développant une orientation du type cube sur arête. On applique une suspension aqueuse contenant de la magnésie, au moins un composé de bore, et jusqu'à 20 % d'oxyde de titane, par rapport au poids de la magnésie, on sèche le revêtement, et on soumet la bande ou tôle audit recuit final. La teneur en bore est dosée dans la gamme d'environ 0,07 % à environ 0,30 %, par rapport au poids de la magnésie, en fonction directe de la granulométrie et de l'activité vis-à-vis de l'acide citrique de la magnésie, et en fonction inverse de la densité apparente du revetement sec. Applications magnétiques de l'acier au silicium.

Annealing silicon steel sheet or strip - using parting cpd. contg. magnesium oxide and boron oxide as magnesium borate

ACIER AU SILICIUM ET PROCEDE POUR LE TRAITEMENT DE CET ACIER

L'invention concerne un procédé pour produire un acier au silicium électromagnétique ayant une orientation à structure cubique sur arêtes et une perméabilité d'au moins 1870 (G/Oe) à 10 oersteds, ainsi que les aciers obtenus. Ce procédé comporte la préparation d'une charge fondue d'acier au silicium contenant 0,02 à 0,06 % de carbone, 0,0006 à 0,008 % de bore, jusqu'à 0,01% d'azote, au plus 0,008 % d'aluminium et 2,5 à 4,0 % de silicium, la coulée de l'acier, le laminage à chaud de l'acier, le laminage à froid de l'acier, la décarburation de l'acier, l'application d'un revêtement d'oxyde réfractaire contenant du bore et du SiO2 et le recuit de texturisation finale de l'acier. L'acier ainsi obtenu convient en particulier pour la réalisation des circuits magnétiques feuilletés.

PROCEDE POUR APPLIQUER UNE COMPOSITION PRECURSEUR SUR UNE PIECE A TRAVAILLER FERREUSE

... a. Procédé pour appliquer une composition précurseur sur une pièce à travailler ferreuse. b. Il comprend le préchauffage de la pièce à travailler à une première température présélectionnée pour recouvrir la pièce avec une composition comprenant de l'oxyde de bore, du borate de métal alcalin et un plastique thermodurcissable, puis ultérieurement le chauffage de la pièce à une deuxième température présélectionnée, ce qui permet de transformer la composition de revêtement protecteur en un revêtement lubrifiant. c. Le revêtement lubrifiant permet de réduire l'éraflement de la pièce et l'usure de la matrice.

COMPOSITION AQUEUSE STABLE POUR APPLIQUER UN REVETEMENT ISOLANT SUR DE L'ACIER AU SILICIUM

Composition aqueuse de magnésie utilisée dans la fabrication de revêtements électriquement isolants sur de l'acier au silicium. On stabilise la viscosité et accroît la concentration d'une suspension aqueuse de magnésie, dans laquelle la magnésie possède une activité vis-à-vis de l'acide citrique inférieure à 200 secondes. Des concentrations en magnésie de 0,1 à 0,24 gramme par millitre de suspension aqueuse sont stabilisées par addition de 0,5 % à 25 % en poids d'un composé contenant un phosphate décomposable, calculé en P2 O5 , par rapport au poids sec de magnésie. Les phosphates préférés sont le monohydrate de phosphate monocalcique, le polyphosphate d'ammonium soluble dans l'eau, le phosphate de calcium dibasique et le phosphate de calcium tribasique. Applications aux compositions de magnésie séparatrices de recuit pour l'acier au silicium.

ABRADABLE MATERIAL COATING LOW SURFACE ROUGHNESS

La présente invention porte sur un revêtement abradable pour pièce de turbomachine, caractérisé par le fait qu'il comprend une couche en matériau abradable dont les aspérités en surface sont comblées par des grains de céramique liés thermiquement et formant une surface libre lisse de faible rugosité. The present invention relates to an abradable coating for a turbomachine part, characterized in that it comprises a layer of abradable material whose surface asperities are filled by thermally bonded ceramic grains and forming a smooth free surface of low roughness.

Ceramic material for corrosion protection - of esp. drill flukes during salt bath hardening, comprises e.g. silica, kaolin, zirconia, alumina and/or meta-kaolin

METHOD FOR APPLYING A PRECURSOR COMPOSITION TO A WORK PIECE FERROUS

INSULATING FILM OF FORSTERITE FORMEE ON the SURFACE Of a SHEET Of STEEL SILICON HAS GRAINS DIRECT WITH a MAGNETIC AND PROCEEDED HIGH INDUCTION OF FORMATION OF THIS FILM

CERMETS RESISTING OXIDATION HAS HIGH TEMPERATURES

COMPOSITION OF MAGNESIA TO FORM a COATING OF GLASS ISOLATING ON STEEL WITH SILICON AND ITS PROCESS From OBTAINING

BOUILLIE DE MAGNESIE AQUEUSE POUR LA FORMATION D'UN REVETEMENT DE VERRE ISOLANT SUR DE L'ACIER AU SILICIUM. UNE PROPORTION NOTABLE DE LA MAGNESIE EST INACTIVE (ACTIVITE A L'ACIDE CITRIQUE SUPERIEURE A 200SECONDES), UN COMPOSE DE TYPE PHOSPHATE DECOMPOSABLE EST PRESENT A RAISON DE 2 A 25 EN POIDS, CALCULE EN PO, PAR RAPPORT AU POIDS SEC DE MAGNESIE ET LA CONCENTRATION DE LA BOUILLIE EN MAGNESIE EST D'AU MOINS 0,24GML. LA BOUILLIE RESISTE A LA DECANTATION PENDANT UNE DUREE ALLANT JUSQU'A 10HEURES ET A UNE VISCOSITE SOUHAITABLE POUR L'APPLICATION PAR DES MOYENS CLASSIQUES; LES COMPOSES DE TYPE PHOSPHATE PREFERES SONT LE PHOSPHATE MONOCALCIQUE MONOHYDRATE, LE POLYPHOSPHATE D'AMMONIUM SOLUBLE DANS L'EAU ET LE PHOSPHATE DICALCIQUE DIHYDRATE.

BELEGGNING AV SUBSTRAT

Process for preparing aqueous dispersion of ceria and resulting product

The invention is concerned with the preparation of dispersions and particularly with the preparation of dispersions of cerium compounds. The invention provides for the preparation of an aqueous dispersion of ceria or hydrated ceria by a process which includes acid treatment of cerium IV hydroxide. Aqueous dispersions in accordance with the present invention find application in a number of technical fields (e.g. in the preparation of dense ceria coatings for use in catalysis and protective coatings, for example, for metals and alloys).

СПОСОБ ИЗГОТОВЛЕНИЯ ТОРМОЗНОГО ДИСКА И ТОРМОЗНОЙ ДИСК

FIELD: transport; car industry. SUBSTANCE: group of inventions relates to transport. Method for manufacturing a brake rotor for a vehicle, in which a protective layer is disposed on the main body of the brake rotor, involves primary machine processing of an area or areas of the main body, which is in the form of a work piece. Then, enamel coating is applied to the main body in a certain area or areas. After that, the post processing of the main body containing the coating in a certain area or area is carried out, herewith the enamel coating is metallurgically bonded to the base material of the main body by means of phase formation. Brake rotor for a vehicle includes a main body, which has a protective layer disposed in a certain area or areas, in which the main body has enamel coating in a certain area or areas. EFFECT: improved resistance to corrosion and increased service life period is achieved. 16 cl, 4 dwg

Stable slurry of inactive magnesium oxide, and process for the preparation thereof

Aqueous magnesia slurry for the formation of an insulating glass coating on silicon steel, in which a significant part of the magnesium oxide is inactive (having a citric acid activity of greater than 200 seconds), in which a labile phosphate compound is present in an amount of from 2 to 25% by weight, calculated as P2O5 based on the dry weight of the magnesium oxide, and in which the magnesia concentration is at least 0.24 g/cm<3> of the slurry. The slurry is stable against settling for up to 10 hours and has a viscosity desired for use for coating with the aid of conventional means. From 10 to 100% of inactive magnesium oxide can be used, the remainder being active magnesium oxide (having a citric acid activity of from 20 to 40 seconds). Preferred phosphate compounds include monocalcium phosphate monohydrate, water-soluble ammonium polyphosphate and dicalcium phosphate dihydrate.

CATALYSTS CONTAINING PLATINUM GROUP METALS

Carbonaceous deposition reduction

The invention is concerned with providing substrates with coatings obtainable from sols, for example to protect the substrate (such as in nuclear reactors or hydrocarbon cracking plant) or to provide a carrier for catalytically active material. Hitherto, coatings obtained from sols have had a high porosity and high surface area so that they have not been entirely satisfactory for the above applications. In the invention, dense, low-porosity coatings are provided by contacting the substrate with a sol of refractory material (e.g. CeO2 or SiO2) convertible to a gel of density at least 40% of the theoretical density of the refractory material, and converting the sol to the gel. Optionally, the gel may be converted to a ceramic coating by firing.

CATALYST PREPARATION

ACID HYDROSOL COATING COMPOSITIONS

... 1536238 Coated substrates MORTONNORWICH PRODUCTS INC 2 June 1977 23516/77 Heading B2E [Also in Division Cl] An acid hydrosol composition capable of self-electroplating onto metals higher than H 2 in the electro-motive series and onto non- metallic substrates comprises (a) H 2 O; (b) an acid which is HCl, HNO 3 , H 3 PO 4 or CH 3 COOH; (c) at least one metal silicate which is hydrous Mg silicate or a Na or K meta silicate or orthosilicate in which the M 2 O : SiO 2 ratio is 1:1 to 2:1 and optionally, (d) MgO or Mg(OH) 2 and (e) B 2 O 3 or H 3 BO 3 . Examples disclose the coating of silicon steel, carbon steel, nickel or aluminium, drying the coating and then annealing at 1200-1600‹F. Non-metallic substrates specified are porcelain, glass, wood, paper, cotton, synthetic resin and hydratable oxides.

SILICON STEEL AND PROCESSING THEREFOR

PROCESS OF PRODUCING AN ELECTRICALLY INSULATIVE GLASS FILM ON SILICON STEEL

Silicon steel and processing therefor

A process for producing grain oriented electromagnetic silicon steel. The process includes the steps of: preparing a melt of silicon steel having, by weight, from 2.5 to 4.0% silicon; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; applying a substantially non-reactive aluminum hydroxide coating to the steel; and final texture annealing the steel. The annealed steel being characterized by a substantially uniform metallic surface.

VERFAHREN ZUM NIEDERSCHLAGEN VON ALUMINIUMOXID AUF EINEM SUBSTRAT

PROCEDURE FOR THE PRODUCTION OF AN ELECTRICAL OF MAGNETIC SILICON STEEL WITH GOS TEXTURE

CUBE-ON-EDGE ORIENTED SILICON STEEL SHEET

PROCESS OF ALUMINA DEPOSITION ON A SUBSTRATE

ELECTRICAL ISNULATION

SEPARATOR OF ANNEALING FOR BLADES Of STEEL SILICON HAS GRAIN DIRECTS

A METHOD FOR APPLYING A THERMAL COATING OF CERAMIC MATTER BARRIER TOLERATING TO THE CONSTRAINTS TO A METAL SUBSTRATE

PROCEEDED OF FORMATION Of a UNIFORM FILM INSULATING AND HIGH ADHERENCE HAS ON a STRIP IRON Of STEEL SILICON

Ceramic material for corrosion protection - of esp. drill flukes during salt bath hardening, comprises e.g. silica, kaolin, zirconia, alumina and/or meta-kaolin

INSULATING FILM OF FORSTERITE FORMEE ON the SURFACE Of a SHEET Of STEEL SILICON HAS GRAINS DIRECT WITH a MAGNETIC AND PROCEEDED HIGH INDUCTION OF FORMATION OF THIS FILM

Annealing silicon steel sheet or strip - using parting cpd. contg. magnesium oxide and boron oxide as magnesium borate

PROCESS IMPROVES TO FORM an INSULATING FILM OF FORSTERITE ON the SURFACE Of a SHEET Of STEEL SILICON HAS GRAIN DIRECTS

ELEKTROMAGNETISKT KISELSTAL OCH SETT ATT FRAMSTELLA DETTA

Annealing separator for silicon steel sheets

An annealing separator for silicon steel sheets comprising not less than 90.00% by weight of an MgO and 0.01 to 2.0% by weight of B2 O3 in the form of nMgO.B2 O3 with the balance being unavoidable impurities.

Method of inhibiting sulfidation and modifying deposits

A method of inhibiting hot sulfidation corrosion of a metal surface and modifying the characteristics of any deposit thereon comprises the step of applying to such metal surface and any deposit thereon an inhibitor-modifier. The inhibitor-modifier is a mixture of chromium oxide and manganese oxide, the combustion product of a solution containing a soluble chromium compound and a soluble manganese compound, or a combination of the mixture and combustion product. The mixture and the solution contain chromium and manganese in a molar ratio of at least 1:1.

Annealing separator for silicon steel sheets

An annealing separator for silicon steel sheets comprising not less than 90.00% by weight of an MgO and 0.01 to 2.0% by weight of B2O3 in the form of nMgO.B2O3 with the balance being unavoidable impurities.

Processing for electromagnetic silicon steel

A process for producing electromagnetic silicon steel having a cube-on-edge orientation. The process includes the steps of: preparing a melt of silicon steel having up to 0.07% carbon, from 0.01 to 0.25% manganese, from 0.01 to 0.09% of material from the group consisting of sulfur and selenium, from 2.5 to 4.0% silicon, up to 1.0% copper, less than 0.009% aluminum and less than 0.0006% boron; casting the steel; hot rolling the steel; cold rolling the steel; normalizing the steel in a hydrogen-bearing atmosphere having a pH2O/pH2 of from 0.015 to 0.3; applying a refractory oxide coating containing an oxide less stable than SiO2 at temperatures up to 2150 DEG F.; and final texture annealing the steel.

ПОКРЫТИЕ ИЗ ИСТИРАЕМОГО МАТЕРИАЛА С НИЗКОЙ ПОВЕРХНОСТНОЙ ШЕРОХОВАТОСТЬЮ

FIELD: machine building. SUBSTANCE: invention relates to an abradable coating for a gas turbine engine. Gas turbine engine having an abradable coating on the inner surface of the stator comprises at least one stator component inside or opposite of which a rotor part is rotatably mounted, wherein said coating of abradable material forms an element of a sealing connection between the stator and rotor parts. Coating of abradable material is made in the form of a layer of abradable material, asperities on the surface of which are filled with thermally bonded ceramic grains. Smooth free surface of the layer of abradable material has a roughness below 6 mcm. Method for applying an abradable coating to the inner surface of a stator of a gas turbine engine comprises obtaining a layer of abradable material on the inner surface of the stator part of said gas turbine engine, filling asperities on the surface of the abradable coating on the stator part by applying a powder of a ceramic material and heat treating said coating layer to bind the powder. EFFECT: coating is provided from an abradable material having a porous structure whose surface has a roughness below 6 mcm. 10 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 656 116 C2 (51) МПК F01D 11/12 (2006.01) B22F 3/105 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F01D 11/12 (2006.01); B22F 3/105 (2006.01) (21)(22) Заявка: 2015103522, 05.08.2013 (24) Дата начала отсчета срока действия патента: Дата регистрации: 01.06.2018 R U 05.08.2013 (72) Автор(ы): ПОДГОРСКИ, Майкл (FR), ЛЕ БИЕ, Филипп, Шарль, Ален (FR), МОЛЛЬЕ, Людовик, Эдмон, Камилль (FR), СЕЛЕЗНЕФФ, Серж (FR) (73) Патентообладатель(и): СНЕКМА (FR) (56) Список документов, цитированных в отчете о поиске: WO 95/12004 A1, 04.05.1995. RU 07.08.2012 FR 1257657 (43) Дата публикации заявки: 27.09.2016 Бюл. № 27 (45) Опубликовано: 01.06.2018 Бюл. № 16 2353779 C2, 27.08.2008. RU 2094529 C, 27.10.1997. RU 2423203 ...

Verfahren zur Beschichtung eines Substrats mit einem feuerfesten Material

STRAIN TOLERANT THERMAL BARRIER COATINGS

SILCON STEEL AND PROCESSING THEREFOR

METHOD OF INHIBITING SULPHIDATION DEPOSITS

Catalyst preparation

The invention is concerned with providing substrates with coatings obtainable from sols, for example to protect the substrate (such as in nuclear reactors or hydrocarbon cracking plant) or to provide a carrier for catalytically active material. Hitherto, coatings obtained from sols have had a high porosity and high surface area so that they have not been entirely satisfactory for the above applications. In the invention, dense, low-porosity coatings are provided by contacting the substrate with a sol of refractory material (e.g. CeO2 or SiO2) convertible to a gel of density at least 40% of the theoretical density of the refractory material, and converting the sol to the gel. Optionally, the gel may be converted to a ceramic coating by firing.

IMPROVEMENTS IN OR RELATING TO ELECTRICAL INSULATION

... 1298409 Modifying steel surfaces ALLEGHENY LUDLUM INDUSTRIES Inc 18 Dec 1970 [2 Jan 1970] 60288/70 Heading C7U An electrically insulative coating is provided on an alloy having a high permeability and a low core loss by treating it with an aqueous solution containing 6-18 mole per cent ammonium ions, 21-63 mole per cent phosphate ions, 8-24 mole per cent chromate ions, and 15-45 mole per cent metal ions from at least one GpIIA metal, at least 1 mole per cent of said metal ions having resulted from the oxide, hydroxide, carbonate, bicarbonate, or chromate of said metal. The coated alloy is cured at 400-1900‹F for 2 seconds to 4 hours. Calcium and magnesium are the preferred metal ions. The alloy treated may be silicon-steel, and the coating is from 0À06 to 0À2 mils thick. Reference is made to Specification 1298410.

PROCEDURE FOR THE PRODUCTION OF ELECTROMAGNETIC, GRAIN-ORIENTED ONES SILICON STEEL

PROCEDURE FOR STRIKING DOWN ALUMINA ON A SUBSTRATE

VARNISHED WIRE HAVING A LOW COEFFICIENT OF FRICTION, AS WELL AS A METHOD FOR PRODUCING SUCH A VARNISHED WIRE

SILICON STEEL AND PROCESSING THEREFORE

PROCESS OF ALUMINA DEPOSITION ON A SUBSTRATE

L'invention concerne un perfectionnement aux dépôts d'alumine sur un substrat, a partir d'une solution Aqueuse d'aluminate de sodium. Elle consiste à immerger le substrat dans une solution aqueuse d'aluminate de sodium dont la composition est contrôlée et ajustée par passage dans un circuit de régénération où l'on procède a une addition d'alumine pour compenser la quantité qui s'est déposée. Application à la réalisation d'adsorbants pour le plomb contenu dans les gaz d'échappement de moteurs à combustion interne.

METHOD FOR PREPARING AN AQUEOUS DISPERSION OF CERIUM OXIDE

ABRADABLE COATING MADE OF A MATERIAL HAVING A LOW SURFACE ROUGHNESS

The present invention relates to an abradable coating for a turbine engine part, characterized by the fact that said coating includes a layer made of an abradable material, the surface asperities of which are filled with thermally bonded ceramic grains, forming a smooth, free surface having a low roughness 1. An abradable coating , comprising a layer of abradable material ,wherein:surface irregularities of the layer are filled in by thermally bound ceramic grains; anda free surface of the layer of the abradable material has a low roughness.2. The coating of claim 1 , wherein the free surface has a roughness of less than 6 μm.3. The coating of claim 1 , wherein the layer comprises at least one selected from the group consisting of alumina claim 1 , zirconia claim 1 , yttriated zirconia claim 1 , mullite claim 1 , and yttria.4. The coating of claim 1 , wherein the layer of abradable material is porous and comprises an alloy of composition MCrAlY with M selected from Ni claim 1 , Co claim 1 , NiCo or CoNi claim 1 , a zirconium oxide or an Ni-graphite compound.5. The coating of claim 1 , wherein the ceramic grains penetrate the layer of the abradable material over a depth of between 50 and 1000 μm.6. A method claim 1 , comprising:applying a ceramic material powder to an abradable layer on a substrate, to form a coating; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'heat-treating the coating to bind the powder, to form the abradable coating of .'}7. The method of claim 6 , wherein a granulometry of the ceramic powder is between 0.1 and 15 μm and is less than a size of pores of the abradable material.8. The method of claim 6 , wherein the ceramic material powder is applied in the form of a slip comprising the powder in suspension in water.9. The method of claim 6 , comprising sintering the coating at a temperature of less than 1200° C.10. The method of claim 6 , comprising sintering the coating by applying a laser beam or other localized heating source.11. The ...

METHOD FOR PRODUCING A BRAKE DISK AND BRAKE DISK

A method for producing a brake disk for a vehicle having a protective layer applied on a main body of the brake disk. The method includes the steps of: 120-. (canceled)21. A method for producing a brake disk for a vehicle , comprising:pre-machining at least one braking surface of the brake disk;applying an enamel coating to the at least one braking surface; andbonding the enamel coating metallurgically to the at least one braking surface, wherein the enamel coating bonds to the to the at least one braking surface by phase formation.22. The method of wherein the enamel coating is a fused mixture claim 21 , that contains glass-forming oxides as well as borax claim 21 , feldspar claim 21 , quartz claim 21 , fluoride claim 21 , sodium carbonate claim 21 , sodium nitrate and opacifiers.23. The method of wherein the enamel coating contains cobalt oxides claim 22 , manganese oxides and/or nickel oxides.24. The method of wherein the enamel coating contains cobalt oxides claim 21 , manganese oxides and/or nickel oxides.25. The method of wherein the at least one braking surface further comprises:a first friction surface; anda second friction surface.26. The method of wherein the step of pre-machining the at least one braking surface is performed by dry turning the braking surface.27. The method of wherein the at least one braking surface is pre-machined to have a roughness of between 6 to 7 μm.28. The method of wherein the step of applying the enamel coating is performed by spraying the enamel coating on the at least one braking surface.29. The method of wherein the step of applying the enamel coating is performed by dipping the at least one braking surface into a dipping bath of the enamel coating.30. The method of further comprising:drying the enamel coating on the at least one braking surface; andbaking the enamel coating.31. The method of further comprising:machining the enamel coating with a mechanical finishing tool.32. A brake disk for a vehicle comprising:a main body; ...

ABRADABLE COATING MADE OF A MATERIAL HAVING A LOW SURFACE ROUGHNESS

The present invention relates to an abradable coating for a turbine engine part, characterized by the fact that said coating includes a layer made of an abradable material, the surface asperities of which are filled with thermally bonded ceramic grains, forming a smooth, free surface having a low roughness 12-. (canceled)3. A method of manufacturing a stator part of a turbine engine , the stator part configured to be outside a rotor part or facing a rotor part , the stator part comprising an internal face that comprises a layer of a MCrAlY abradable coating wherein M is selected from the group consisting of Ni , Co , NiCo , and CoNi , the layer of the MCrAlY alloy being intended to form a seal between the stator part and the rotor part , the method comprising:filling surface irregularities of the layer of the abradable coating with ceramic grains, the ceramic grains being alumina, andheating the layer of the abradable coating to bind the ceramic grains by partial sintering, a free surface of the layer of the abradable coating comprising portions of the MCrAlY alloy and the alumina.4. The method according to claim 3 , wherein a ceramic grain size is between 0.1 and 15 μm.5. The method according to claim 3 , wherein a ceramic grain size is less than 1 μm.6. The method according to claim 3 , wherein the ceramic grains penetrate the layer of the abradable coating over a depth of between 50 and 1000 μm.7. The method according to claim 3 , wherein the surface irregularities are filled by a slip comprising the ceramic grains in suspension in water claim 3 , the method further comprising removing the excess of slip by scraping the free surface of the layer of the abradable coating.8. The method according to claim 7 , wherein the slip further comprises a dispersant and a binder.9. The method according to claim 3 , wherein the layer of the abradable coating is heated at a temperature of less than 1200° C.10. The method according to claim 3 , wherein the layer of the abradable ...

Покрытие из истираемого материала с низкой поверхностной шероховатостью

1. Истираемое покрытие для газотурбинного двигателя, отличающееся тем, что оно содержит слой из истираемого материала, неровности на поверхности которого заделываются термически связанными керамическими зернами, при этом свободная поверхность слоя истираемого материала имеет невысокую шероховатость.2. Истираемое покрытие по п. 1, гладкая свободная поверхность которого имеет шероховатость ниже 6 мкм, в частности, ниже микрона.3. Истираемое покрытие по п. 1, поверхностный слой которого содержит, по меньшей мере, один из следующих материалов: оксид алюминия, диоксид циркония, иттрийсодержащий диоксид циркония, муллит или иттрин.4. Истираемое покрытие по п. 1, слой истираемого материала которого является пористым и содержит сплав состава MCrAlY c М, выбираемым из Ni, Co Nico или CoNi, оксида циркония, соединения Ni-графит.5. Истираемое покрытие по п. 1, керамический материал которого проникает в истираемый слой на глубину от 50 до 1000 мкм.6. Способ для нанесения истираемого покрытия по п. 1, содержащий после осуществления истираемого слоя на подложке, стадию нанесения порошка керамического материала, затем термообработки покрытия для связывания порошка.7. Способ по п. 6, по которому крупность керамического порошка составляет от 0,1 до 15 мкм и ниже размера пор истираемого материала.8. Способ по п. 6, по которому названный порошок наносится в виде шликера, содержащего суспензию порошка в воде, возможно, с диспергатором и связующим.9. Способ по п. 6, при котором спекание осуществляется при температуре ниже 1200°С.10. Способ по одному из пп. 6-8, при котором спекание осуществляется наведением лазерного пучка или другого средства, обеспечивающего местный нагрев. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК B22F 3/105 (13) 2015 103 522 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2015103522, 05.08.2013 (71) Заявитель(и): СНЕКМА (FR) Приоритет(ы): (30) Конвенционный приоритет: 07.08.2012 FR 1257657 (85) Дата ...

Preparation of composite material by thermite reaction

The wear-resistant coating made of the material with low surface roughness

本发明涉及一种涡轮发动机部件的耐磨涂层，其特征在于，所述涂层包括由耐磨材料制成的层，该层的表面粗糙处填充有热粘合陶瓷颗粒，形成具有低粗糙度的平滑、自由表面。

PROCESS FOR STABILIZING THE VISCOSITY OF AN AQUEOUS MAGNESIA SUSPENSION AND COMPOSITION USED FOR THIS EFFECT

ANNEALING SEPARATOR FOR ORIENTED GRAIN SILICON STEEL BLADES

Un séparateur de recuit utilisable pour produire une lame d'acier au silicium à grain orienté ayant d'excellentes propriétés magnétiques, comprend un oxyde de magnésium non hydratable qui a été grillé à une température de 1 300 degrés C ou plus, de préférence de 1 300 à 2 100 degrés C, et qui se présente sous la forme de fines particules, dont 70 % en poids ont une taille de 5 microns ou moins, et optionnellement, de l'hydroxyde de magnésium dans une proportion de 1 à 100 % rapportée au poids de l'oxyde de magnésium et/ou un composé d'aluminium dans une proportion de 0,05 à 10 % rapportée au poids de l'oxyde de magnésium An annealing separator usable to produce a grain oriented silicon steel blade having excellent magnetic properties, comprises a non-hydratable magnesium oxide which has been roasted at a temperature of 1300 degrees C or more, preferably 1. 300 to 2100 degrees C, and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in a proportion of 1 to 100% reported by weight of magnesium oxide and / or an aluminum compound in a proportion of 0.05 to 10% based on the weight of magnesium oxide

Protective coating for titanium and titanium alloys

PROCESS FOR PREPARING AN ELECTROMAGNETIC SILICON STEEL

L'invention concerne un procédé pour préparer de l'acier électromagnétique au silicium. On prépare une masse fondue d'acier au silicium contenant jusqu'à 0,07 % de carbone, 0,01 à 0,25 % de manganèse, 0,01 à 0,09 % de soufre et/ou de sélénium, 2,5 à 4,0 % de silicium, jusqu'à 1,0 % de cuivre, moins de 0,009 % d'aluminium et moins de 0,0006 % de bore, on coule l'acier, on lamine l'acier à chaud, on lamine l'acier à froid, on normalise l'acier dans une atmosphère contenant de l'hydrogène présentant un rapport PH 2 O/PH2 de 0,015 à 0,3, on applique un revêtement d'oxyde réfractaire contenant un oxyde moins stable que SiO2 aux températures atteignant 1 177 degrés C et on soumet l'acier à un recuit de texturation final. L'invention s'applique en particulier à la préparation d'acier électromagnétique au silicium ayant une orientation cube sur arête. The invention relates to a process for preparing electromagnetic silicon steel. A silicon steel melt is prepared containing up to 0.07% carbon, 0.01 to 0.25% manganese, 0.01 to 0.09% sulfur and / or selenium, 2, 5 to 4.0% silicon, up to 1.0% copper, less than 0.009% aluminum and less than 0.0006% boron, steel is cast, hot-rolled steel, the steel is cold rolled, the steel is normalized in an atmosphere containing hydrogen having a PH 2 O / PH2 ratio of 0.015 to 0.3, a refractory oxide coating is applied containing an oxide less stable than SiO2 at temperatures up to 1177 degrees C and the steel is subjected to a final texturing annealing. The invention applies in particular to the preparation of electromagnetic silicon steel having a cube-on-edge orientation.

PROCESS FOR FORMING A UNIFORM AND HIGH ADHERENCE INSULATING FILM ON A SILICON STEEL STRIP

L'INVENTION CONCERNE UN PROCEDE PERFECTIONNE POUR FORMER UN FILM ISOLANT UNIFORME ET A HAUTE ADHERENCE SUR UN FEUILLARD D'ACIER AU SILICIUM A GRAINS ORIENTES SANS AUGMENTATION DES PERTES DANS LE FER, DANS LEQUEL UN FEUILLARD D'ACIER AU SILICIUM LAMINE A FROID A SON EPAISSEUR FINALE EST SOUMIS A UN RECUIT DE DECARBURATION POUR FORMER SUR LA SURFACE UNE MICROCOUCHE LIMITE CONTENANT DE LA SILICE, SUR LAQUELLE ON APPLIQUE UN SEPARATEUR DE RECUIT CONSISTANT PRINCIPALEMENT EN MAGNESIE ET A UN RECUIT FINAL POUR FORMER UN FILM ISOLANT. LE PROCEDE DE L'INVENTION EST CARACTERISE EN CE QU'ON UTILISE UN SEPARATEUR DE RECUIT DE LA SERIE DE LA MAGNESIE CONTENANT 0,1-10 EN POIDS D'UN COMPOSE DE STRONTIUM, CALCULE EN STRONTIUM. THE INVENTION RELATES TO A PERFECTED PROCESS FOR FORMING A UNIFORM AND HIGH ADHESION INSULATION FILM ON A SILICON STEEL STRIP WITH ORIENTED GRAIN WITHOUT INCREASE IN LOSSES IN IRON, IN WHICH A COLD ROLLED SILICON STEEL STRIP. FINAL THICKNESS IS SUBJECTED TO A DECARBURATION annealing to form on the surface a limited micro-layer containing silica, on which is applied an annealing separator consisting mainly of magnesia and to a final annealing to form an insulating film. THE PROCESS OF THE INVENTION IS CHARACTERIZED IN USING A MAGNESIA SERIES annealing separator containing 0.1-10 by weight of a STRONTIUM COMPOUND, CALCULATED AS STRONTIUM.

SILICON STEEL AND PROCESS FOR ITS TREATMENT

Le procédé selon l'invention comporte la préparation d'une charge en fusion d'acier au silicium contenant 0,02 à 0,06 % de carbone, 0,0006 à 0,0080 % de bore, jusqu'à 0,01 % d'azote, au plus 0,008 % d'aluminium et 2,5 à 4,0 % de silicium, la coulée de l'alliage, le laminage à chaud de l'acier, le laminage à froid de l'acier, la décarburation de l'acier, l'application d'un revêtement d'oxyde réfractaire contenant du bore et un oxyde moins stable que le SiO 2 à des températures jusqu'à 1200 degrés C, et le recuit de texturisation finale, la perméabilité étant d'au moins 1870 (G/Oe) à 10 oersteds. L'acier ainsi obtenu convient en particulier pour les circuits magnétiques. The process according to the invention comprises the preparation of a molten charge of silicon steel containing 0.02 to 0.06% carbon, 0.0006 to 0.0080% boron, up to 0.01% nitrogen, not more than 0.008% aluminum and 2.5 to 4.0% silicon, alloy casting, hot rolling of steel, cold rolling of steel, decarburization of steel, the application of a refractory oxide coating containing boron and an oxide less stable than SiO 2 at temperatures up to 1200 degrees C, and the final texturizing annealing, the permeability being of at least 1870 (G / Oe) at 10 oersteds. The steel thus obtained is suitable in particular for magnetic circuits.

SILICON STEEL AND ITS PREPARATION PROCESS

ON PREPARE UNE COMPOSITION FONDUE POUR ACIER AU SILICIUM CONSTITUEE DE 0,02 A 0,06 DE CARBONE, 0,0006 A 0,0080 DE BORE, JUSQU'A 0,0100 D'AZOTE, AU PLUS 0,008 D'ALUMINIUM ET 2,5 A 4,0 DE SILICIUM; ON COULE L'ACIER, ON LAMINE A CHAUD, ON LAMINE A FROID, ON DECARBURE, ON APPLIQUE UN REVETEMENT D'OXYDE REFRACTAIRE CONTENANT DU BORE ET DU SULFATE DE MANGANESE ET ON EFFECTUE UN RECUIT DE TEXTURATION FINAL. L'INVENTION S'APPLIQUE EN PARTICULIER A LA PREPARATION D'ACIERS ELECTROMAGNETIQUES AU SILICIUM A ORIENTATION CUBE SUR ARETE, AYANT UNE PERMEABILITE D'AU MOINS 1870GOE A 10OE ET UNE PERTE DANS LE NOYAU D'AU PLUS 1,587WKG A 17KG-60HZ. A MELT COMPOSITION FOR SILICON STEEL CONSTITUTED OF 0.02 TO 0.06 CARBON, 0.0006 TO 0.0080 BORON, UP TO 0.0100 NITROGEN, NOT MORE 0.008 ALUMINUM AND 2, 5 to 4.0 SILICON; THE STEEL IS CAST, HOT ROLLED, COLD ROLLED, DECARBRATED, A REFRACTORY OXIDE COATING CONTAINING BORON AND MANGANESE SULPHATE IS APPLIED AND A FINAL TEXTURING ANCELING IS PERFORMED. THE INVENTION APPLIES IN PARTICULARLY TO THE PREPARATION OF SILICON ELECTROMAGNETIC STEELS WITH CUBE-ON-EDGE ORIENTATION, HAVING A PERMEABILITY OF AT LEAST 1870GOE TO 10OE AND A CORE LOSS OF NOT MORE THAN 1.587WKG AT 17KG-60HZ.

PROCESS FOR TREATMENT OF ORIENTATED SILICON STEEL INHIBITED BY ALUMINUM NITRIDE

Patent FR2355088B1

Patent FR2322930B1

PROCESS FOR THE MANUFACTURE OF ELECTRICALLY INSULATING COATINGS ON SILICON STEEL

Procédé pour la fabrication de revêtements électriquement isolants sur de l'acier au silicium. On fabrique une pellicule vitreuse électriquement isolante sur une bande ou une tôle d'acier au silicium laminé à froid, qui possède une perméabilité magnétique supérieure à 1850 à 796 A/m après un recuit final à haute température développant une orientation du type cube sur arête. On applique une suspension aqueuse contenant de la magnésie, au moins un composé de bore, et jusqu'à 20 % d'oxyde de titane, par rapport au poids de la magnésie, on sèche le revêtement, et on soumet la bande ou tôle audit recuit final. La teneur en bore est dosée dans la gamme d'environ 0,07 % à environ 0,30 %, par rapport au poids de la magnésie, en fonction directe de la granulométrie et de l'activité vis-à-vis de l'acide citrique de la magnésie, et en fonction inverse de la densité apparente du revetement sec. Applications magnétiques de l'acier au silicium. Process for the manufacture of electrically insulating coatings on silicon steel. An electrically insulating glass film is fabricated on a cold rolled silicon steel strip or sheet which has a magnetic permeability greater than 1850 at 796 A / m after high temperature final annealing developing a cube-on-edge orientation. . Applying an aqueous suspension containing magnesia, at least one boron compound, and up to 20% titanium oxide, based on the weight of the magnesia, drying the coating, and subjecting the strip or sheet to said final annealing. The boron content is assayed in the range of about 0.07% to about 0.30%, based on the weight of the magnesia, depending directly on the particle size and the activity towards the magnesia. citric acid of magnesia, and in inverse function of the bulk density of the dry coating. Magnetic applications of silicon steel.

Patent FR2399485B1

Coating material for flame or plasma spraying - uses mixt. of metal oxide(s) and silica to obtain hard, tough refractory mineral coatings contg. vitreous phase

The material consists of agglomerates formed by (wt.%) 50-99% of at least two oxides, esp. Al2O3, MgO, CaO, BaO, Cr2O3, TiO2, and/or ZrO2; plus 1-50% of at least one glass forming oxide, esp. SiO2, with a m.pt. which is 50-1100 deg.C lower than the other metal oxides. The pref. materials include (I) 50-80% CaO, 1-5% MgO, 18-45% SiO2; or (II) 50-90% MgO, 1-5% CaO, 5-45% SiO2, or (III) 90-95% Cr2O3, 2-8% TiO2, 1-3% SiO2; or (IV) 46-51% Al2O3, 33-41% ZrO2, 8-21% SiO2. The oxides are pref. fed through a plasma burner to obtain an agglomerate which can be collected in cooling system of water or air; or the plasma burner can be used to spray the agglomerate directly onto a substate to be protected. With powder mixts similar to (I) to (IV) above, coatings can be obtd. consisting of dicalcium silicate plus moticellite; forsterite and a vitreous phase; a mineral rich in Cr, plus a vitreous phase; or corundum plus baddeleyite and a vitreous phase. To provide a non-metallic refractory material as a protective coating applied in a single operation, and resisting mechanical- and thermal-shock and abrasion and with min. porosity.

Patent FR2058055A5

SILICON STEEL AND PROCESS FOR THE TREATMENT OF THIS STEEL

L'invention concerne un procédé pour produire un acier au silicium électromagnétique ayant une orientation à structure cubique sur arêtes et une perméabilité d'au moins 1870 (G/Oe) à 10 oersteds, ainsi que les aciers obtenus. Ce procédé comporte la préparation d'une charge fondue d'acier au silicium contenant 0,02 à 0,06 % de carbone, 0,0006 à 0,008 % de bore, jusqu'à 0,01% d'azote, au plus 0,008 % d'aluminium et 2,5 à 4,0 % de silicium, la coulée de l'acier, le laminage à chaud de l'acier, le laminage à froid de l'acier, la décarburation de l'acier, l'application d'un revêtement d'oxyde réfractaire contenant du bore et du SiO2 et le recuit de texturisation finale de l'acier. L'acier ainsi obtenu convient en particulier pour la réalisation des circuits magnétiques feuilletés. The invention relates to a process for producing an electromagnetic silicon steel having a cubic structure orientation on edges and a permeability of at least 1870 (G / Oe) at 10 oersteds, as well as the obtained steels. This process involves preparing a molten charge of silicon steel containing 0.02-0.06% carbon, 0.0006-0.008% boron, up to 0.01% nitrogen, not more than 0.008 % aluminum and 2.5 to 4.0% silicon, steel casting, hot rolling of steel, cold rolling of steel, decarburization of steel, application of a refractory oxide coating containing boron and SiO2 and the final texturizing annealing of the steel. The steel thus obtained is suitable in particular for making laminated magnetic circuits.

Use of mining and metallurgical waste as glass or ceramic - esp. as coatings for metal articles as corrosion protection

The parent patent, glass and ceramic prod. are made using mining and metallurgical waste materials or ores rich in iron oxides, contg. as essential constituent SiO2 a and CaO, and are combined to form wallastonite. In this addn. industrial wastes other than the above mentioned "red waste" capable of vitrification, are used, such as coal mining schists, fly ash, zinc slag, lead slag and red mud from Al2O3 or TiO2 prodn. The glass and ceramic products contains 10-50 wt.% SiO2, 10-40% CaO, 3-40% iron oxides, 1-15% Al2O3, 0-60% T2O2, 0-15% Na2CO3, 0-40% blast furnace slag and 0-40% sodium felspase or phonolite. Used as massive materials or coatings on metallic or non-metallic substrates, esp. in the form of a metal tube with the vitreous coating prestressed. Specifically claimed uses are as silencers for automobiles, sealed fluid ducts, washing machine drums, etc.

PROCESS FOR APPLYING THERMAL BARRIER COATING OF TOLERANT CERAMIC MATERIAL TO CONSTRAINTS ON A METALLIC SUBSTRATE

LA PRESENTE INVENTION CONCERNE UN PROCEDE POUR APPLIQUER UN REVETEMENT DE BARRIERE THERMIQUE CERAMIQUE TOLERANT AUX CONTRAINTES SUR UN SUBSTRAT METALLIQUE. ON APPLIQUE SUR LE SUBSTRAT METALLIQUE UN REVETEMENT DE MATIERE CERAMIQUE DENSE. LE REVETEMENT DE MATIERE CERAMIQUE EST ALORS PARTIELLEMENT FONDU ET ON LUI PERMET DE SOLIDIFIER. DES FISSURES SE DEVELOPPENT LORS DE LA SOLIDIFICATION CE QUI AMELIORE LA TOLERANCE AUX CONTRAINTES DE LA MATIERE CERAMIQUE ET REND CELLE-CI RESISTANTE A L'EFFRITEMENT PENDANT LES CYCLES THERMIQUES. L'INVENTION EST PAR EXEMPLE UTILISABLE DANS LE DOMAINE DES MOTEURS A TURBINES A GAZ. THE PRESENT INVENTION CONCERNS A PROCESS FOR APPLYING A CERAMIC THERMAL BARRIER COATING TOLERANT TO STRAIN ON A METAL SUBSTRATE. A COATING OF DENSE CERAMIC MATERIAL IS APPLIED TO THE METAL SUBSTRATE. THE COATING OF CERAMIC MATERIAL IS THEN PARTIALLY MELTED AND IT IS ALLOWED TO SOLIDIFY. CRACKS DEVELOP DURING SOLIDIFICATION WHICH IMPROVES THE TOLERANCE TO THE STRESSES OF THE CERAMIC MATERIAL AND MAKES IT RESISTANT TO SCRATCHING DURING THERMAL CYCLES. THE INVENTION CAN BE USED FOR EXAMPLE IN THE FIELD OF GAS TURBINE ENGINES.

Annealing separator for grain oriented silicon steel strips

An annealing separator useful for producing a grain oriented silicon steel strip having an excellent magnetic property, comprises non-hydrating magnesium oxide which has been calcined at a temperature of 1300° C. or more, preferably, from 1300° to 2100° C., and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in an amount of 1 to 100% based on the weight of the magnesium oxide and/or an aluminium compound in an amount of 0.05 to 10% based on the weight of the magnesium oxide.

Method for producing silicon steel

Method of inhibiting sulfidation and modifying deposits

ABSTRACT OF THE DISCLOSURE A method of inhibiting hot sulfidation corrosion of a metal surface and modifying the characteristics of any deposit thereon comprises the step of applying to such metal surface and any deposit thereon an inhibitor-modifier. The inhibitor-modifier is a mixture of chromium oxide and manganese oxide, the combustion product of a solution con-taining a soluble chromium compound and a soluble manganese compound, or a combination of the mixture and combustion product. The mixture and the solution contain chromium and manganese in a molar ratio of at least 1:1.

Coatings

ABSTRACT OF THE DISCLOSURE Gel coatings are produced from sols, which coatings have a lower porosity and higher density than the prior art coatings. Such gel coatings are convertible to ceramic coatings of low porosity and high density even after relatively mild heat treatment. This may be done by using sols comprising unaggregated colloidal primary particles, or aggregated colloidal primary particles with additional components to occupy the gaps in the aggregated particles. A method of providing a substrate with a gel coating is described wherein the substrate is contacted with a sol of a refractory material and capable of being converted to a gel of the refractory material. The bulk density of the gel is at least 40%, preferably at least 45%, of the theoretical density of the refractory material, and the sol is converted to a gel to provide the substrate with the gel coating. A sub-strate carrying an adherent coating of a gel of a refractory material is also described wherein the density of the gel is at least 40% of the theoretical density of the refractory material.

Silicon steel and processing therefore

A process for producing grain oriented electromagnetic silicon steel. The process includes the steps of: preparing a melt of silicon steel having, by weight, from 2.5 to 4.0% silicon; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; applying a substantially non-reactive aluminum hydroxide coating to the steel; and final texture annealing the steel. The annealed steel being characterized by a substantially uniform metallic surface.

Annealing separator

Method of stabilizing viscosity and increasing concentration of aqueous magnesia slurry

ABSTRACT OF THE DISCLOSURE A method of stabilizing the viscosity and increasing the concentration of an aqueous magnesia slurry in which the magnesia has a citric acid activity less than 200 seconds. Magnesia concentrations of 0.1 to 0.24 grams magnesia per cubic centimeter of slurry can be stabilized by addition of 0.5% to 25% by weight of a decomposable phosphate-containing compound, calculated as P2O5, based on the dry weight of magnesia. Preferred phosphate compounds include monocalcium phosphate monohydrate, water soluble ammonium polyphosphate, dibasic calcium phosphate, and tribasic calcium phosphate.

Silicon steel and processing therefor

COATING IN ABRADABLE MATERIAL WITH LOW SURFACE ROUGHNESS

Process for obtaining grain=oriented electromagnetic silicon steel

PROCESS FOR PRODUCING AN ELECTRIC GRAIN ORIENTED STEEL RIBBON HAVING IMPROVED MAGNETIC PROPERTIES AND GLASS FILM PROPERTIES

LA PRESENTE INVENTION FOURNIT UN SEPARATEUR DE RECUIT CONSTITUE DE 0,05 A 2PARTIES EN POIDS DE SULFATE D'ANTIMOINE PAR RAPPORT A 100PARTIES EN POIDS D'OXYDE DE MAGNESIUM, ET D'AU MOINS UN CHLORURE CHOISI PARMI LES CHLORURES DE SB, SR, TI ET ZR, LA PROPORTION DE CHLORURE ETANT DE 5 A 20 EN POIDS PAR RAPPORT A LA TOTALITE DU CHLORURE ET DU SULFATE D'ANTIMOINE, ET POUVANT LE CAS ECHEANT CONTENIR DE L'OXYDE DE TI DANS UNE PROPORTION DE 0,5 A 10PARTIES EN POIDS. LE SEPARATEUR DE RECUIT EST APPLIQUE SUR LE RUBAN RECUIT POUR DECARBURATION ET AMELIORE TANT LES PROPRIETES MAGNETIQUES QUE LES PROPRIETES DE PELLICULE DE VERRE, LORS DE LA PRODUCTION D'UNE TOLE D'ACIER ELECTRIQUE A GRAINS ORIENTES. UTILISATION NOTAMMENT POUR REALISER LES NOYAUX DE TRANSFORMATEURS ET AUTRES APPAREILS ELECTRIQUES. THE PRESENT INVENTION PROVIDES AN ANCIENT SEPARATOR CONSISTING OF 0.05 TO 2 PARTS BY WEIGHT OF ANTIMONY SULPHATE RELATED TO 100 PARTS BY WEIGHT OF MAGNESIUM OXIDE, AND AT LEAST ONE CHLORIDE SELECTED FROM CHLORIDES OF SB, SR, TI AND ZR, THE PROPORTION OF CHLORIDE BEING 5 TO 20 BY WEIGHT TO TOTAL CHLORIDE AND ANTIMONY SULPHATE, AND MAY IF NECESSARY CONTAIN TI OXIDE IN A PROPORTION OF 0.5 TO 10 PARTS IN WEIGHT. The annealing separator is applied to the annealed tape for decarburization and improves both the magnetic properties and the glass film properties, when producing an oriented grain steel sheet. USE IN PARTICULAR FOR MAKING THE CORES OF TRANSFORMERS AND OTHER ELECTRICAL DEVICES.

Patent FR2367027B2

Method of producing dense refractory oxide coatings on metallic substrates and the production of catalysts from the coated substrates

The invention is concerned with providing substrates with coatings obtainable from sols, for example to protect the substrate (such as in nuclear reactors or hydrocarbon cracking plant) or to provide a carrier for catalytically active material. Hitherto, coatings obtained from sols have had a high porosity and high surface area so that they have not been entirely satisfactory for the above applications. In the invention, dense, low-porosity coatings are provided by contacting the substrate with a sol of refractory material (e.g. CeO 2 or SiO 2 ) convertible to a gel of density at least 40% of the theoretical density of the refractory material, and converting the sol to the gel. Optionally, the gel may be converted to a ceramic coating by firing.

Method for forming forsterite insulating film on an oriented silicon steel sheet

Forsterite insulating films having a high adhesion on an oriented silicon steel sheet are formed by a method wherein an annealing separator consisting mainly of magnesia is applied on surfaces of the oriented silicon steel sheet and the steel sheet is wound up into a coil-form and then annealed at high temperatures to form forsterite insulating films, which is characterized by that the content of water carried into the coil together with the annealing separator is controlled depending upon the content of CaO component carried into the coil together with the annealing separator.

SIEVE FOR REMOVING POLLUTIONS FROM MOLTEN FERROUS METAL.

Method of providing a ceramic coating on a metallic substrate

PROCESS FOR TREATMENT OF ORIENTATED SILICON STEEL INHIBITED BY ALUMINUM NITRIDE

METHOD OF MAKING ELECTROMAGNETIC SILICONE STEEL

Solution and method for producing heat resistant electrical insulation coatings on ferrous surfaces

Patent FR2355087B1

METHOD OF MANUFACTURING AN ELECTROMAGNETIC SILICON STEEL

Process for producing electromagnetic silicon steel

Silicon steel and processing therefore

SILICON STEEL AND PROCESSING THEREFORE ABSTRACT OF THE DISCLOSURE A process for producing grain oriented electromagnetic silicon steel. The process includes the steps of: preparing a melt of silicon steel having, by weight, from 2.5 to 4.0% silicon; casting the steel; hot rolling the steel; cold rolling the steel; decarburizing the steel; applying a substantially non-reactive aluminum hydroxide coating to the steel; and final texture annealing the steel. The annealed steel being characterized by a substantially uniform metallic surface.

Coating of substrates

Highhmagneticcflux density oneeway siliconnsteellfolstellite insulator film and method of formation thereof

Viscosity stabilisation of magnesia suspensions - by adding a decomposable phosphate

Composition aqueuse de magnésie utilisée dans la fabrication de revêtements électriquement isolants sur de l'acier au silicium. On stabilise la viscosité et accroît la concentration d'une suspension aqueuse de magnésie, dans laquelle la magnésie possède une activité vis-à-vis de l'acide citrique inférieure à 200 secondes. Des concentrations en magnésie de 0,1 à 0,24 gramme par millitre de suspension aqueuse sont stabilisées par addition de 0,5 % à 25 % en poids d'un composé contenant un phosphate décomposable, calculé en P2 O5 , par rapport au poids sec de magnésie. Les phosphates préférés sont le monohydrate de phosphate monocalcique, le polyphosphate d'ammonium soluble dans l'eau, le phosphate de calcium dibasique et le phosphate de calcium tribasique. Applications aux compositions de magnésie séparatrices de recuit pour l'acier au silicium.

Method of inhibiting sulfidation and modifying deposits

A method of inhibiting hot sulfidation corrosion of a metal surface and modifying the characteristics of any deposit thereon comprises the step of applying to such metal surface and any deposit thereon an inhibitor-modifier. The inhibitor-modifier is a mixture of chromium oxide and manganese oxide, the combustion product of a solution containing a soluble chromium compound and a soluble manganese compound, or a combination of the mixture and combustion product. The mixture and the solution contain chromium and manganese in a molar ratio of at least 1:1.

Process for depositing alumina onto a substrate and alumina regeneration

A process for the concurrent deposition and regeneration of alumina onto a substrate from an aqueous sodium aluminate solution comprising immersing the substrate in an aqueous sodium aluminate solution of which the composition is controlled and adjusted by passage through a regeneration circuit where alumina is added to make up for the quantity deposited. The invention may be used in the production of adsorbents for the lead present in the exhaust gases of internal combustion engines.

Annealing silicon steel

Method for manufacturing a brake disc, and brake disc

Composition for preparing a refractory oxide coating on a boric silicon steel before the annealing heat treatment

KISELSTAL IV

Annealing separator

PROCESS FOR THE PRODUCTION OF AN ELECTRICALLY INSULATING GLASS FILM ON SILICIC STEEL.

HEAT-RESISTANT BINDING AGENT

Patent JPS5226206B2

Annealing release material for electrical steel sheet

Composition of diluting agent for annealing

Coating process

WAY TO IMPROVE CORE LOSS FEATURES OF KUB-PA OFFICE-OILED SILICONE ALLOY STEEL

Applying annealing separators to oriented grain electrical steel sheet

The coating of oriented grain steel sheet with annealing separators is carried out from a suspension of annealing separator in a suspension medium having a non-aqueous base, preferably commercial ethyl alcohol containing limited and controlled amounts of water, e.g. below 5%, by continuously passing steel sheet as the cathode of an electrophoretic cell, between a pair of electrodes placed in, and near the free surface of the bath, symmetrically with respect to the steel sheet.

METHOD OF APPLYING AN ELECTRICALLY INSULATING GLASS FILM ON SILICON STEEL

Corrosion protection for zinc-surfaced and aluminum-surfaced articles

Silicon steel and processing therefore

A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/O e ) at 10 oersteds. The process includes the steps of: preparing a melt of silicon steel containing from 0.02 to 0.06% carbon, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, no more than 0.008% aluminum and from 2.5 to 4.0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and an oxide less stable than SiO 2 at temperatures up to 2150° F; and final texture annealing said steel.

METHOD OF PREPARING AN ALUMINUM OXIDE COVER ON METAL WOOL

Process of producing an electrically insulative film

A process of producing an electrically insulative glass film on cold reduced silicon steel strip or sheet stock which will have a magnetic permeability greater than 1850 at 796 A/m after a final high temperature anneal which develops cube-on-edge orientation, which comprises applying an aqueous slurry containing magnesia, at least one boron compound, and up to 20% titanium dioxide, based on the weight of magnesia, drying the coating, and subjecting the coated stock to said final anneal, the total boron content being proportioned within the range of about 0.07% to about 0.30%, based on the weight of magnesia, in accordance with any two of the three parameters: particle size distribution, citric acid activity, and surface area, i.e., inversely to the bulk density of the dried coating. Improved core loss characteristics are obtained without sacrifice of permeability values.

Method of forming an insulating film on a grain-oriented silicon steel sheet

A highly adhesive and uniform insulating film can be formed on a grain-oriented silicon steel sheet without deteriorating the iron loss of the steel sheet by the use of a magnesia series annealing separator containing a strontium compound.

Silcon steel and processing therefor

Process perfected to produce electromagnetic silicon steel that has an orientation in cubes of edge and a permeability of at least 1870 (g/oe) to 10 oerstedios, process that includes the steps consisting of: preparing a broth of silicon steel that contains from 0.02 to 0.06% carbon, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, not more than 0.008% aluminum and from 2.5 to 4.0% of silicon; strain said steel; hot rolled said steel; cold rolling said steel; decarburizing said steel; apply a refractory oxide coating to said steel; and annealing said steel to the final texture. (Machine-translation by Google Translate, not legally binding)

METHOD OF DEPOSITING ALUMINUM OXIDE ON A SUBSTRATE

IMPROVEMENT OF PROCESSES FOR DEPOSITIONING ALUMINA ON A SUBSTRATE

1530718 Purifying exhaust gases PECHINEY UGINE KUHLMANN 13 Dec 1976 [15 Dec 1975] 51884/76 Heading B1L [Also in Divisions Cl and Fl] Lead is removed from the exhaust gas of a combustion engine by passing the gas through metal wool (stainless steel wool specified) which has been coated with alumina by treating the wool with aqueous alkali metal aluminate solution, the composition of which is adjusted by passage through a regeneration circuit where alumina is added to make up for the quantity deposited.

Method of forming a forsterite insulating film on the surface of a grain-oriented silicon steel sheet

A high adhesion uniform forsterite insulating film can be formed on the surface of a grain-oriented silicon steel sheet by the application of an annealing separator consisting mainly of magnesia having a narrow activity distribution defined by the citric acid activity of the magnesia which varies depending upon the variation of final reaction ratio of the magnesia as determined by the method for measuring the citric acid activity of magnesia, where the final reaction ratio of the magnesia is the ratio of that amount of the magnesia which finally reacts with citric acid to the total amount of magnesia mixed with the citric acid.

Stable slurry of inactive magnesia and method therefor

ABSTRACT OF THE DISCLOSURE An aqueous magnesia slurry for forming an insulative glass coating on silicon steel, wherein a substantial portion of the magnesia is inactive (a citric acid activity greater than 200 seconds), a decomposable phosphate compound is present within the range of 2% to 25% by weight calculated as P2O5, based on the dry weight of magnesia, and the magnesia concentration is at least 0.24 grams per cubic centimeter of slurry. The slurry is stable against settling for up to 10 hours and has a desirable viscosity for coating application by conventional means. From 10% to 100% inactive magnesia may be used with the remainder an active magnesia (citric acid activity of 20 to 40 seconds). Preferred phosphate compounds include monocalcium phosphate monohydrate, water soluble ammonium polyphosphate and dicalcium phosphate dihydrate.

Method of producing electrically insulating glass film layer on silicon steel

Improvement in the manufacture of oriented grain electrical steel sheet

Process for producing of an electrical steel plate of oriented grains

Process for producing textureted electromagnetic silicon steel with clean to metal surface

Abradable coating made of a material having a low surface roughness

本发明涉及一种涡轮发动机部件的耐磨涂层，其特征在于，所述涂层包括由耐磨材料制成的层，该层的表面粗糙处填充有热粘合陶瓷颗粒，形成具有低粗糙度的平滑、自由表面。

Catalyst

Aluminium nitride-inhibited oriented silicon steel

Coating of substrates

The invention is concerned with providing substrates with coatings obtainable from sols, for example to protect the substrate (such as in nuclear reactors or hydrocarbon cracking plant) or to provide a carrier for catalytically active material. Hitherto, coatings obtained from sols have had a high porosity and high surface area so that they have not been entirely satisfactory for the above applications. In the invention, dense, low-porosity coatings are provided by contacting the substrate with a sol of refractory material (e.g. CeO2 or SiO2) convertible to a gel of density at least 40% of the theoretical density of the refractory material, and converting the sol to the gel. Optionally, the gel may be converted to a ceramic coating by firing.

Electrolytic base coating used in the production of high permeability silicon steel

ELECTROLYTIC BASE COATING USED IN THE PRODUCTION OF HIGH PERMEABILITY SILICON STEEL ABSTRACT OF THE DISCLOSURE A process for producing high permeability electromagnetic silicon steel having a cube-on-edge orientation. The process includes the steps of: preparing a melt of silicon steel containing from 2.5 to 4.0% silicon; casting; hot rolling, cold rolling; decarburizing; applying a refractory oxide base coating; and final texture annealing. The refractory oxide base coating is applied by electrolyzing an aqueous solution having as a major constituent at least one compound from the group consisting of water soluble salts of calcium, magnesium, manganese and aluminum and as a minor constituent boron,with the steel being arranged as the cathode in the solution; by removing the thus coated steel from the solution; and by heating the coated steel at an elevated temperature.

DEVELOPMENT FOR CATALYSTS

La présente invention concerne des perfectionnements apportés aux catalyseurs de métaux nobles du groupe platine. Le catalyseur comprend un support sur lequel est déposé un premier revêtement d'un oxyde metallique réfractaire et sur ce revêtement est déposé un revêtement d'un ou plusieurs composés intermétalliques de la formule générle Ax By où A est choisi parmi Ru, Th, Pd, Ir et Pt et B est choisi parmi Al, Sc, Y, les lanthanides, Ti, Zr, Hf, V, Nb, et Ta et x et y sont des nombres entiers. L'invention est par exemple utilisable pour la préparation d'acide nitrique par oxydation catalytique de l'ammoniaque The present invention relates to improvements to noble metal catalysts of the platinum group. The catalyst comprises a support on which is deposited a first coating of a refractory metal oxide and on this coating is deposited a coating of one or more intermetallic compounds of the general formula Ax By where A is chosen from Ru, Th, Pd, Ir and Pt and B is selected from Al, Sc, Y, lanthanides, Ti, Zr, Hf, V, Nb, and Ta and x and y are integers. The invention can for example be used for the preparation of nitric acid by catalytic oxidation of ammonia.

CORROSION RESISTANT DIAPHRAGMS AND FILTERS WITH OXYD CERAMIC COATING

Process for obtaining highly permeable electromagnetic silicon steel of cube-edged orientation