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Method and device for spray forming of high-speed solid phase particles

A solid-phase particle, injection molding technology, applied in the field of devices implementing the technology, can solve the problems of single injection molding form, low gas outlet velocity of atomizing nozzle, dispersion of metal liquid, limited cooling acceleration effect, etc., and achieve stable performance, The effect of the equipment structure is separate and easy to promote and use

Inactive Publication Date: 2012-12-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1) The gas outlet velocity of the atomizing nozzle used is relatively low (generally 200 m / s), and only the annular resonant cavity nozzle of Professor Gurant (MIT) and the annular slot resonant cavity of Professor Wu Chengyi of Beijing University of Science and Technology Type nozzles can exceed Mach 1 sound velocity (up to Mach 2.5), so the dispersion, cooling and acceleration of liquid metal droplets are limited;
[0006] 2) The structure and process performance of the existing nozzles cannot meet the increasing requirements for depositing alloy materials;
[0007] 3) The form of spray forming is single, limited to the gas spray forming of various metals and alloys
The huge kinetic energy and quenching effect of solid particles have never considered the huge influence on the spray forming process

Method used

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  • Method and device for spray forming of high-speed solid phase particles
  • Method and device for spray forming of high-speed solid phase particles
  • Method and device for spray forming of high-speed solid phase particles

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specific Embodiment 1

[0059] This embodiment provides a high-speed solid-phase particle injection molding device. as attached figure 1 As shown, the high-speed solid-phase particle injection molding device includes: high-speed solid-phase particle generating equipment and an induction melting furnace containing molten metal.

[0060] The high-speed solid-phase particle generating equipment includes: motor 1; gas reversing chamber 2; material pipe 3; conical pipe 4; solid-liquid phase particle deposit 5; nozzle 6; induction melting furnace 7; powder bin 8; Tube 9; stainless steel gas tube 10.

[0061] as attached figure 2 As shown, the induction melting furnace includes: melting crucible bottom 16; molten metal delivery conduit 17; high (medium) frequency induction coil 23; For the heat preservation of the metal liquid flow in the furnace, and the insulation between the crucible and the induction coil, a layer (MgO+MgCl 6 ) drying the self-setting refractory insulation layer (thickness 8-12 mm)...

specific Embodiment 2

[0071] This embodiment provides a method for performing high-speed solid-phase particle injection molding using the high-speed solid-phase particle injection molding device of the first embodiment.

[0072] The working mode of the high-speed solid-phase particle injection molding is as follows:

[0073] Step 1, the motor 1 drives the stainless steel gas pipe 10 to rotate axially;

[0074] Step 2, adding solid powder from the powder silo 8 to the material tube 3, and the solid powder is pushed into the conical tube 4 through the screw pusher blade installed on the surface of the stainless steel air tube;

[0075] Step 3, the high-pressure gas introduced from the high-pressure gas introduction pipe 9 into the gas reversing chamber 2 enters the inside of the stainless steel gas pipe 10 through the small hole on the surface of the stainless steel gas pipe 10, and is ejected from the front end of the stainless steel gas pipe 10, and the ejected high-pressure gas A negative pressur...

specific Embodiment 3

[0082] The preparation method of the high-speed solid-phase particle jet deposition equipment in specific embodiment one is as follows:

[0083] Step 1, preparation of high-speed solid-phase particle generator

[0084] In step 1.1, the engine type is determined according to the spray deposition rate and the composition of the spray deposition alloy to be prepared.

[0085] According to the spray deposition speed and the composition of the spray deposition alloy to be prepared (the composition of the composite material of metal and solid phase particles to be prepared), the required high-speed solid phase particle supply speed is obtained, and according to this supply speed, set to meet this requirement 1. The powder propulsion equipment required by the technical requirements, that is, the electric motor.

[0086] Step 1.2, setting the inclination angle of the screw pusher blade.

[0087] The inclination angle of the screw pusher blade is related to the speed at which the solid...

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Abstract

The invention relates to a method and a device for spray forming of high-speed solid phase particles. The device comprises a high-speed solid phase particle generating device and an induction smelting furnace. The high-speed solid phase particle generating device comprises a focus nozzle and a pipe body. The pipe body comprises a material pipe, a conical pipe and a sealed gas reversing chamber. A stainless steel gas pipe is inserted into the pipe body in axial direction, the front end of the stainless steel gas pipe is arranged inside the conical pipe, high-pressure gas led from a high-pressure gas leading pipe passes through the gas reversing chamber and enters the stainless steel gas pipe from small vent holes on the surface of the stainless steel gas pipe, negative pressure is formed inside the conical pipe, solid powder generates high-speed solid particles fast and the high-speed solid particles are sprayed out from the nozzle. The nozzle is arranged below the induction smelting furnace and provided with a vertical inner through hole, and the lower end of a molten metal conveying guide pipe at the bottom of the induction smelting furnace penetrates out from an inner hole of the nozzle. By means of the novel spray forming technology, cooling speed of the molten metal is increased to 104.5-106 DEG C / S, and various multi-phase metastable phase composite phase materials can be directly produced.

Description

technical field [0001] The invention relates to the technical field of spray forming (Osprea) of metals and alloys, in particular to a special metallurgical technology for atomizing and depositing metal and alloy liquid flows with high-speed solid particles, and a device for implementing the technology. Background technique [0002] Since 1989, Professor Singer of Swance University in the UK proposed for the first time that the metal liquid is continuously deposited on the surface of a solid substrate by using the heat carried by the metal droplet in the process of gas atomization, so that the liquid and semi-liquid Drops of Metal, with (10 3 °C / sec) extremely fast cooling rate solidifies into solid metal and alloy parts with a certain shape and density. This technology has attracted the attention of European and American countries for a while. Eight years later, at the Massachusetts Institute of Technology, Professor Gurant researched and developed a porous resonant cavity...

Claims

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Application Information

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IPC IPC(8): B22F3/115
Inventor 吴成义郭志猛罗骥曾鲜曹慧钦杨剑张稳稳屈彦杰
Owner UNIV OF SCI & TECH BEIJING
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