1415 results about "Electromagnetic stirring" patented technology

The invention relates to a method for preparing endogenetic particle reinforced metal matrix composites under the coupling effect of a magnetic field and supersonic waves. The method comprises: adjusting the temperature of a metal matrix fused mass to the reaction initial temperature after refining, adding a reactant which can generate a particle phase with the fused mass through the reaction in situ for implementing the synthesis reaction, standing the mixture after the reaction is over, and cooling the mixture to the pouring temperature for pouring; and the method is characterized in that: the magnetic field and the high-intensity ultrasonic field are simultaneously exerted in the reaction synthesis process to realize the synthesis of endogenetic particle reinforced metal matrix composites under the coupling effect of the magnetic field and the high-intensity ultrasonic field. The magnetic field can be an intense pulse magnetic field, a high frequency oscillation magnetic field or a low frequency alternating magnetic field. In the method, the coupling effect of the magnetic field and the ultrasonic field makes the particle sizes be thinned and dispersed evenly; the ultrasonic vibration agitation and electromagnetic stirring functions improve the composite dynamic condition, and the compounding of the particle phase and a base metal interface is better; and the co-action of magnetochemistry and sonochemistry improves the thermodynamic condition of the reaction in situ, as well as speeding up the reaction in situ and controlling the growth of the particle phase.

The invention discloses a titanium-based powder material preparing device. The titanium-based powder material preparing device is characterized by at least comprising a vacuum chamber, a magnetic levitation melting furnace, an atomizing chamber and a powder collecting unit, wherein the upper part of the vacuum chamber is provided with a feeding chamber; the magnetic levitation melting furnace is arranged inside the vacuum chamber; the atomizing chamber is arranged under and integrally connected with the vacuum chamber; the power collecting unit is composed of a powder collecting chamber arranged under the atomizing chamber. During application, after the magnetic levitation melting furnace is electrified by high-frequency alternating current, a high-frequency alternating magnetic field canbe generated in the space surrounding a coil and produce induced eddy current inside furnace materials, the induced eddy current interacts with an external alternating magnetic field to produce levitation force of the furnace materials, and the materials can be in a suspended state through the levitation force and by self-gravity; meanwhile, an eddy current loop can produce a large amount of heatto rapidly melt the furnace materials, and under the action of electromagnetic stirring, deslagging, degassing and purification are conducted; by controlling the magnetic field, the purified molten materials fall down into the atomizing chamber, and by means of a supersonic high-pressure argon atomizer and a cooling device, can be atomized into titanium-based powder.