Steel fluid field dynamic control device in continuous casting crystallizer

Method and device for reducing channel segregation defects in directional solidification casting

The invention relates to a method and a device for reducing channel segregation defects in a directional solidification casting. The method for reducing channel segregation in the directional solidification casting comprises the following step of putting a directional solidification fusant into a magnetic field, so that the fusant is solidified into a casting in the magnetic field. The directional solidification of the casting is completed by adopting the method, so that the quantity of the channel segregation defects in the casting can be greatly reduced.

Continuous steel casting process and device with function of electromagnetic excitation compound mechanical stirring

The invention discloses a continuous steel casting process with a function of electromagnetic excitation compound mechanical stirring. According to the process, when alloy melt solidifies, microscopic and macroscopic strong shear flows are generated to break dendritic crystal by the electromagnetic excitation compound mechanical stirring technology, and accordingly, solidification structure refinement, full-equiaxed crystallization and solute segregation reduction are achieved, and alloy properties are improved. The invention further provides a continuous steel casting device mainly comprising a crystallizer, a rotor stirring paddle, a wheel, a program control motor, a magnetic field generator, a coil, and a voltage-regulating frequency-modulating alternating current source. The microscopic flows generated by electromagnetic excitation and macroscopic flows generated by mechanical stirring form complex chaotic flows which form strong shear flows to brake the dendritic crystal, crystal nucleus ...

Method for measuring anisotropy of magnetic susceptibility

The invention relates to a method for measuring anisotropy of magnetic susceptibility, belonging to the technical field of magnetic susceptibility measurement of substance magnetism. The method is characterized in that: based on the principal that the orientation of a thin film occurs in a strong magnetic field, magnetic field intensity of the orientation is determined through XRD, and grain volume of the thin film under the magnetic field is determined through SEM so as to calculate the anisotropy of magnetic susceptibility. The magnetic susceptibility [chi] I I of an easy magnetizing axis and the magnetic susceptibility [chi] perpendicular to perpendicular to the easy magnetizing axis are satisfied in case of 300K.

Method for controlling particle diameter of nanometer powder

The invention provides a method for controlling the particle size of nano-powder. According to the method, only a superconducting magnetic field with the magnetic density being 0.1 to 14 T is required to be imposed to the evaporation-condensation part without changing the preparation device during the process of preparing the nano-powder based on the evaporation-condensation method which takes resistors, high-frequency induction, plasma, electron beams, laser and the like as the heating source. Since the magnetic field changes the critical nucleation energy of the evaporated atoms and further changes the nucleation concentration and the nucleation speed, thereby achieving the purpose of controlling the particle size of the nano-powder through adjusting the magnetic intensity. The method improves the efficiency, the uniformity and the particle size adjustment range of the nano-powder preparation based on the evaporation condensation method.

Method and device for modulating electromagnetic stirring and rotating magnetic field based on permanent magnet

The invention relates to a method and a device for modulating an electromagnetic stirring and rotating magnetic field based on a permanent magnet. In the method, a magnetic field the magnetic induction of which changes in accordance with the following equation of B=B0cos(2*pi*omega*t+phi) can be generated, wherein the magnetic field amplitude B0, the magnetic field frequency omega and the magnetic field phase position phi can be modulated independently or jointly. The device adopts the magnetic field modulation method and structurally comprises a stirrer wrapped on the periphery of a crystallizer, and the internal structure thereof is characterized in that a permanent magnet is inlaid in a toroidal core; the toroidal core is connected with a programmable stepping motor and is driven by the stepping motor to rotate; and the magnetic field generated by the stirrer always keeps the same rotating mode with the stepping motor. The invention can modulate the amplitude, the frequency and the phase ...

Metal continuous casting crystallizer composite apparatus capable of controlling initial solidification

Method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and device therefor

The invention relates to a method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and a device therefor. The method utilizes electromagnetic shock excitation effect for thinning molten drop and solidification structure, so as to improve the refining effect and reduce segregation. The device comprises a copper mould crystallizer, a water jacket, a high temperature alloy electrode bar, a water-cooled copper plate bottom electrode and a power supply. The invention is characterized in that a magnetic field generator is arranged at the periphery of the water-cooling copper mould crystallizer to generate magnetic field which is compounded with current of electroslag melting, thus generating oscillating lorentz force. The invention is used for electroslag remelting and refining the high temperature alloy, can improve the refining effect and reduce segregation of cast ingot.

Preparation method of cellular composite material

The invention discloses a preparation method of a cellular composite material. The method comprises the following steps: arranging inner walls of a plurality of specially manufactured die at intervals in periodicity, regulating the height and spaces of the inner walls of the specially manufactured dies according to demands, casting fusion material into the inner walls of the specially manufactured dies so that the fusion material is compounded with the inner walls of the specially manufactured dies to prepare the required cellular composite material. Compared with the existing machining preparation method, the mass continuous production of the cellular material can be easily realized through the casting of the fusion material; and diversity of the size form of the cellular material is realized due to the adjustability of the space and height of the hexagonal inner wall.

Continuous casting crystallizer capable of controlling liquid level flow field and wave motion

The invention relates to a device of continuous casting crystallization mould with a controllable liquid level and fluctuation, pertaining to the metal continuous casting process technology field. The invention can reduce slag entrapment on liquid surface of crystallization mould according to the mechanism of slag entrapment production in crystallization mould to inhibit metallic liquid flow horizontally. The main part of the invention is basically the same as the traditional crystallization mould, while the difference lies in that the two sides of the crystallization mould upper part are provided with self consumption metal plates and feeding mechanisms; the self consumption metal plate is inserted into the metallic liquid of the crystallization mould through a straightening roller, a guide roller and a transport roller; continuously casting billets are finally drawn off by a dummy bar. The structure of the invention comprises: a metallic pouring basket (1), a submerged nozzle (2), a straightening ...

Device and method for regulating and controlling solidification structure and defect of large steel ingot through vacuum insulation riser and composite electromagnetism and application of device and method for regulating and controlling solidification structure and defect of large steel ingot

The invention discloses a device and method for regulating and controlling solidification structures and defects of a large steel ingot through a vacuum heat insulation riser and composite electromagnetism and application of the device and method. The lower end of a steel ingot mold and a bottom mold are assembled together to form a main body part of the steel ingot mold, and a riser device is installed at the upper end of the steel ingot mold; it is ensured that riser molten steel and exothermic slag in the vacuum riser can be kept in a liquid state within the set time; a bottom die cooling medium runner is further arranged in the bottom die to dissipate heat of the lower half portion of molten steel in the ingot die, an electromagnetic stirring device is further arranged on the outer side of the vacuum riser, a spiral alternating magnetic field generated by a spiral electromagnetic stirrer is used for driving the molten steel in the riser to spirally move in the rotating direction of ...

Steel fluid field dynamic control device in continuous casting crystallizer

The invention relates to a steel-liquid flow-field dynamic control device used for a casting steel crystallizer. The invention comprises two separated magnetic yokes and two magnetic pole groups which are respectively arranged at the outer side of the copper plate of the steel crystallizer. One end of the magnetic pole group firmly contacts the magnetic yoke to form a closed loop. A plurality of magnetic poles are fixed to form magnetic pole groups by two coil frames and the outer wall is winded with the coil. The other end of the magnetic pole group is contacted with the copper plate of the steel crystallizer to form a static magnetic filed between the magnetic pole groups. The invention can control and optimize the steel liquid flow field in the steel crystallizer through regulating the magnetic field strength of different positions on the width of the steel crystallizer or changing the opposite position between the magnetic poles and an invaded water gap, meeting the requirements of ...

Method for controlling film orientation in vacuum evaporation film making process

The invention relates to a method for controlling film orientation in a vacuum evaporation film making process, belonging to the technical field of vacuum evaporation deposited film process. The method is characterized in that, based on a traditional vacuum evaporation deposit device which is commonly used, an intense magnetic field generation device is additionally arranged outside the vacuum evaporation deposit device, and the strength of the magnetic field of the vacuum evaporation deposit device is required to be larger than 4T (Tesla), and different orientation magnetic energy differences of the magnetic field on metal films cause preferential growth of crystal orientation, thereby achieving the aim of controlling the film orientation through adjusting the strength of the magnetic field.

Method for controlling flowing of magnetic liquid

The invention relates to a method for controlling the flowing of magnetic liquid. The method comprises the following steps that a, magnetic field generating devices are symmetrically arranged at the two sides of a passage container, and the magnetic liquid is contained in the passage container; b, the magnetic field generating devices generate a gradient magnetic field, the gradient direction of the gradient magnetic field is regulated, and when the gradient direction of the gradient magnetic field generated by the magnetic field generating devices is identical to the magnetic liquid flowing direction, the flowing speed of magnetic nanometer particles in the magnetic liquid is accelerated under the magnetic force effect; when the gradient direction of the gradient magnetic field generated by the magnetic field generating devices is opposite to the magnetic liquid flowing direction, the flowing speed of the magnetic nanometer particles in the magnetic liquid is decelerated under the magnetic ...

Cooling method used for directional solidification and cooling device therefor

The invention relates to a cooling method used for directional solidification and a cooling device therefor. In the method, liquid metal is taken as cooling liquid, and a formwork is cooled by adopting the spray cooling method independently or adopting the spray cooling method and the immersion cooling method simultaneously. For the cooling device, a liquid metal spraying device is arranged under a direction solidification holding furnace, and the liquid metal is taken as the cooling liquid to cool the pull-down formwork by spraying independently or accompanying with the immersion. The invention has the advantages that the thermal radiation of a heating area and a cooling area for direction solidification can be insulated; and the cooling liquid is recycled, so as to cool the cooling liquid in cycling.

Metal initial solidification control method in continuous casting crystallizer

The invention discloses a control method of metal initial solidification in a continuous casting crystallizer, which belongs to the technique field of metal continuous casting process. The invention can better control the growth of an initial solidified shell, reduce the depth of oscillation marks, and improve the blank shell quality through adjusting the relative position and power of a coil above the crystallizer. The method comprises the concrete steps: the relative position of the coil above the crystallizer is adjusted through measuring the fluctuation condition of the free surface of liquid in the crystallizer, and the heating intensity of the coil is adjusted through measuring the temperature variation condition in the initial solidification region in the crystallizer, thereby effectively controlling the growth of meniscus solidified tissues, improving the solidified tissues, reducing the depth of oscillation marks and the occurrence of other defects, and being favorable for realizing ...

Modulation method of continuous casting electromagnetic stirring magnetic field generator

The invention relates to a modulation method of a continuous casting electromagnetic stirring magnetic field generator, which is realized by modulating an induction coil in a water cooling jacket shell. The method comprises the steps of: introducing current, the frame/ frequency/ phase of which can be singly modulated or modulated along with each other, into an induction coil so as to generate a magnetic field, the frame/ frequency/ phase of which can be singly modulated or modulated along with each other, in molten metal within the control range of the metal coil, in order to correspondingly and independently or simultaneously adjust the magnitude, the action point and the direction of electromagnetic force acting on the molten metal, thereby accurately controlling the molten metal to flow in order to control the solidification process of continuous casting metal, and further achieve the purpose of improving casting blank quality.

Metal initial solidification control method in continuous casting crystallizer

The invention discloses a control method of metal initial solidification in a continuous casting crystallizer, which belongs to the technique field of metal continuous casting process. The invention can better control the growth of an initial solidified shell, reduce the depth of oscillation marks, and improve the blank shell quality through adjusting the relative position and power of a coil above the crystallizer. The method comprises the concrete steps: the relative position of the coil above the crystallizer is adjusted through measuring the fluctuation condition of the free surface of liquid in the crystallizer, and the heating intensity of the coil is adjusted through measuring the temperature variation condition in the initial solidification region in the crystallizer, thereby effectively controlling the growth of meniscus solidified tissues, improving the solidified tissues, reducing the depth of oscillation marks and the occurrence of other defects, and being favorable for realizing ...

Metal continuous casting crystallizer composite apparatus capable of controlling initial solidification

The invention discloses a metal continuous casting crystallizer compound device which can control an initial solidification, belonging to the metal continuous casting technique field. The invention has an improvement on the basis of the original crystallizer so as to better control the growth of the initial solidification shell to get a shell with better quality. The invention is characterized in that a heating induction coil is arranged to heat the metal liquid and protective slag neighboring a crystal meniscus so as to enhance the microcosmic organization structure of the solidification shell and the lubrication effect between the shell and the crystallizer and further reduce the shell defect and enhance the strength of the initial solidification shell, which is also good for the enhancement of the continuous casting efficiency. The structure of the invention comprises a heating coil (1), a crystallizer (2), a cooling water shell (3), a vibration device (4), a shell (5), a metal liquid ...

Method of reducing alloy element segregation in high temperature alloy oriented freezing organization

The invention relates to a method of reducing alloy element segregation in high temperature alloy oriented freezing organization in a static magnetic field, belonging to the technical field of alloy organization control development. The invention makes use of a Bridgman oriented freezing device in a traditionally used strong static magnetic field and is designed and distributed into a central region in which the liquid-solid phase interface of high temperature alloy is located in the stable strong static magnetic field; the whole freezing process of the high temperature alloy is finished in the strong static magnetic field.

Method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and device therefor

The invention relates to a method for magnetic control electroslag remelting and high-efficiency refining high temperature alloy and a device therefor. The method utilizes electromagnetic shock excitation effect for thinning molten drop and solidification structure, so as to improve the refining effect and reduce segregation. The device comprises a copper mould crystallizer, a water jacket, a high temperature alloy electrode bar, a water-cooled copper plate bottom electrode and a power supply. The invention is characterized in that a magnetic field generator is arranged at the periphery of the water-cooling copper mould crystallizer to generate magnetic field which is compounded with current of electroslag melting, thus generating oscillating lorentz force. The invention is used for electroslag remelting and refining the high temperature alloy, can improve the refining effect and reduce segregation of cast ingot.

Continuous casting crystallizer with heat pipe cooling system

The invention relates to a continuous casting crystallizer with a heat pipe cooling system, belonging to the field of cooling technology of the continuous casting crystallizers. The structure of the continuous casting crystallizer mainly comprises a submerged nozzle (1), a crystallizer copper pipe (2), heat pipes (3) and a cooling water jacket (4). The crystallizer copper pipe (2) is positioned at the central part of the entire device; the crystallizer copper pipe (2) is connected with the periphery cooling water jacket (4) by the heat pipe (3); the evaporation end of the heat pipes (3) is connected with the crystallizer copper pipe (2), and the condensed end of the heat pipes (3) is connected with the cooling water jacket (4); and a plurality of groups of the heat pipes (3)are distributed on the wide face and the narrow face of the crystallizer copper pipe (2). The device can enhance the cooling efficiency of the crystallizer, and is helpful to enhance the casting speed.

Measurement device for porosity of foam material

The invention relates to a measurement device for the porosity of a foam material. The measurement device comprises a conductivity meter, electrode lead wires and the foam material, wherein the electrode lead wires are connected between the conductivity meter and the foam material respectively; and the conductivity meter is used for measuring the conductivity of the foam material so that the porosity of the foam material is represented. Compared with the prior art, the measurement device has the advantages that the porosity is represented by quantitatively measuring the conductivity of the material; and the measurement device is simple to operate and high in precision and is suitable for actual measurement operation in mass production.

Method and device for directionally solidifying liquid-solid interface based on alternating magnetic field modulation

The invention relates to a method and device for directionally solidifying a liquid-solid interface based on alternating magnetic field modulation. In the method, an alternating magnetic field is added above the liquid-solid interface at the periphery of a crystallizer, induction current of the alternating magnetic field in a melt is coupled with the magnetic field to generate electromagnetic stirring power, the magnitude, direction and frequency of the electromagnetic stirring power are relevant to the properties of the melt body, and a flat melt liquid-solid interface can be obtained by modulating the magnitude, direction and frequency of the electromagnetic field. In the device, an adjustable copper inductance coil which can generate an alternating magnetic field is sheathed at the periphery of a main heating body in a furnace body, and the inductance coil is connected with a frequency-conversion induction power supply. In the invention, the magnetic field is modulated by adopting the ...

Method for preparing nano-level P-type Bi2Te3-base composite thermoelectric material

The invention relates to a preparation method of chemical synthesis nanometer Bi2Te3 based microcosmic composite thermoelectric material, which pertains to the technical field of the technique of chemical synthesizing nanometer thermoelectric material under low temperature. The invention adopts simple substances of Bi and Sb, or chlorinated salt and Te as raw materials; the raw materials are put into an alkaline aqueous solution with reducing agent and stirred by a magnetic stirrer, the nanometer (Bi, Sb) 2Te3 microcosmic composite thermoelectric material is synthesized at the temperature of 50-80 DEG C. Particle nanocrystalline with particle size about 100nm can be obtained by controlling the reaction condition. The invention has the advantages of simple and straightforward technique, low energy consumption, high product purity, no surface modifier, etc. The prepared (Bi, Sb) 2Te3 synthesized compound is P-type material applied to Bi2Te3 based industry.

Method and device for directionally solidifying liquid-solid interface based on alternating magnetic field modulation

The invention relates to a method and device for directionally solidifying a liquid-solid interface based on alternating magnetic field modulation. In the method, an alternating magnetic field is added above the liquid-solid interface at the periphery of a crystallizer, induction current of the alternating magnetic field in a melt is coupled with the magnetic field to generate electromagnetic stirring power, the magnitude, direction and frequency of the electromagnetic stirring power are relevant to the properties of the melt body, and a flat melt liquid-solid interface can be obtained by modulating the magnitude, direction and frequency of the electromagnetic field. In the device, an adjustable copper inductance coil which can generate an alternating magnetic field is sheathed at the periphery of a main heating body in a furnace body, and the inductance coil is connected with a frequency-conversion induction power supply. In the invention, the magnetic field is modulated by adopting the ...

Cup cover with automatic rotary output function

The invention relates to a cup cover with an automatic rotary output function. The cup cover comprises a Stirling engine device, a cup cover shell and a power transmission shaft, wherein the Stirling engine device is fixed to the bottom of the cup cover shell, and the power transmission shaft is connected to an output shaft of the Stirling engine device. The Stirling engine device allows internal air of the cup cover to expand or shrink periodically in the manner of heating outside the bottom of the cup cover, so that reciprocating motion of a piston is achieved; mechanical work is output through the power transmission shaft, and therefore the rotating function of the cup cover is achieved. Compared with an existing device, the cup cover has the advantages of being simple in operation, high in repeatability and the like and can add more fun into life.

Method for composite electromagnetic continuous-casting high-oriented ultra-fine grained materials

Device for preparing foam metal in alternating magnetic field

The invention discloses a device for preparing foam metal in an alternating magnetic field. The device comprises a magnetic field device, a metal fusion material and a crucible, wherein the metal fusion material is arranged in the crucible, is positioned in the magnetic field device, and is used for preparing the foam metal under the action of the magnetic field device. The device can relatively control bubbles in a molten body, the bubbles can stably exist in the molten body for a long time and are relatively uniformly distributed and relatively uniform in size. By adjusting the intensity and the frequency parameter of the magnetic field, the preparation requirements of different foam metal material can be met.

Method for controlling size of boiling liquid bubbles

The invention relates to a method for controlling size of boiling liquid bubbles. The method specifically includes that (1) when a magnetic field generating device generates a gradient magnetic field of which a gradient direction and a gravity direction are the same, a magnetic force is exerted on boiling liquid, the direction of the magnetic force and the gravity direction are the same, at the moment, bubble desorption size is reduced due to combined action of a resultant force, bubbles are rapidly subjected to desorption from a heating surface, and the boiling heat transmission efficiency is increased; the bubble desorption size is smaller and the boiling heat transmission efficiency is higher with the increasing of gradient of the gradient magnetic field; (2) when the magnetic field generating device generates a gradient magnetic field of which the gradient direction and the gravity direction are opposite, a magnetic force is exerted on the boiling liquid, the direction of the magnetic ...

Method for improving properties of nonlinear optical crystal of ZnGeP2

The invention discloses a method for improving the properties of a nonlinear optical crystal of ZnGeP2. The method comprises directionally growing synthesized ZnGeP2 polycrystalline materials into a superconducting magnet uniform magnetic field and a gradient magnetic field, specifically, increasing the temperature slowly to 1070 DEG C, and after the polycrystalline materials are melt, performing heat preservation for 8 h and then performing directional solidification, wherein the crystal growth speed is 0.5 mu m/s; after the polycrystalline materials grow for 40 h, reducing the temperature slowly to obtain monocrystalline ZnGeP2 with intact appearance and few cracks. The method for improving the properties of the nonlinear optical crystal of ZnGeP2 can obviously improve the optical and electrical properties of the monocrystalline ZnGeP2 compared with methods without the magnetic fields.

Metal casting device equipped with noble gas protective sealing system