A gas atomization preparation method and equipment for fine spherical metal powder

A gas atomization and metal powder technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of complex overall design of atomization equipment, low atomization gas pressure, and low rotation speed of rotating disk, etc., to increase the characteristic surface energy , Narrow particle size distribution and good sphericity

Active Publication Date: 2019-04-23
有研金属复材技术有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Compared with single gas atomization or rotary disk atomization, the gas-rotary atomization process has higher atomization efficiency, and the atomization gas pressure used is lower, and the rotation speed of the rotary disk is also lower, avoiding the single atomization The extreme working state of the way, but the overall design of the atomization equipment is more complicated

Method used

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  • A gas atomization preparation method and equipment for fine spherical metal powder
  • A gas atomization preparation method and equipment for fine spherical metal powder
  • A gas atomization preparation method and equipment for fine spherical metal powder

Examples

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Embodiment

[0057] Example: fine spherical AlSi 10 Preparation of Mg alloy powder

[0058] The smelting furnace adopts intermediate frequency induction heating, and the material of the smelting crucible 4 is graphite. The holding furnace is heated by a graphite heating body, and the material of the holding crucible 5 is graphite. The material of the diversion nozzle 9 is graphite, and the outlet aperture is 1.5 mm. Stainless steel ring hole atomizer: Φ0.8×20, that is, the inner diameter of the nozzle hole is 0.8mm, and the number of nozzle holes is 20. Adopt mechanical pump-Roots pump two-stage vacuum system. A two-stage cyclone separation system is used.

[0059] Weigh AlSi 10 10 kilograms of Mg alloys are added in the melting crucible 4 . The furnace cover 1 and the furnace body 3 are tightly closed, and the vacuum is evacuated to 10 - 1 Pa. The metal pressure ring 2 is hydraulically driven, so that the protruding teeth at the upper end of the metal pressure ring are aligned wi...

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Abstract

The invention belongs to the technical field of metal powder material preparation, and relates to a gas atomization preparation method and equipment for fine spherical metal powder. The preparation method includes technological processes such as material smelting, metal melt jet driven by positive pressure, gas atomization, cooling and powder collection, performance testing, screening, packaging, etc., and the inert gas is reversely filled into the melting chamber by reducing the outlet aperture of the diversion nozzle To a certain positive pressure, the smelting chamber in the gas atomization equipment is designed as a pressure vessel, the connection between the furnace cover and the furnace body adopts a locking and sealing device, and the smelting chamber and the atomizing tank are designed to be separated from each other and only communicated through the diversion nozzle. The method can effectively improve the yield of metal powder fine powder; compared with the existing gas atomization metal powder preparation technology, the metal powder fine powder prepared by this method has a high yield, narrow particle size distribution, and high sphericity. Good, low oxygen content, low consumption of atomizing gas, simple process equipment, strong continuity, suitable for industrial production and widely used.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal powder materials, and in particular relates to a gas atomization preparation method and equipment of fine spherical metal powder. Background technique [0002] Fine spherical metal powder is the raw material for advanced manufacturing technologies such as 3D printing and injection molding. Gas atomization is an important method for preparing fine spherical metal powders. [0003] Traditional gas atomization powder making equipment can be used to prepare inert metal powders such as aluminum alloys, copper alloys, stainless steel, nickel-based superalloys, etc., where "inert" means that the metal does not undergo chemical reactions when in contact with refractory materials in a molten state; but , the traditional gas atomization powder making equipment and the commonly used process for preparing fine spherical metal powder generally have the problem of low fine powder yield. The parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0876B22F1/065
Inventor 黎兴刚张少明樊建中邢吉丰舒适刘锡魁
Owner 有研金属复材技术有限公司
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