Gas atomization preparing method for micro spherical metal powder and equipment thereof
A metal powder and gas atomization technology, which is used in metal processing equipment, transportation and packaging, etc., can solve the problems of low atomizing gas pressure, low rotation speed of the rotating disk, and complex overall design of the atomizing equipment, and achieves narrow particle size distribution. Good sphericity, the effect of increasing the characteristic surface energy
Active Publication Date: 2017-10-20
有研金属复材技术有限公司
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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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[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 preparing a metal powder material and provides a gas atomization preparing method for micro spherical metal powder and equipment thereof. The preparing method comprises the technological process of smelting a material, driving molten metal jet flow through positive pressure, atomizing gas, carrying out cooling, collecting powder, detecting performance, and carrying out screening, packaging and the like, by reducing the outlet hole diameter of a flow guide nozzle, inert gas is reversely filled into a smelting chamber to certain positive pressure, the smelting chamber in the gas atomizing equipment is designed into a pressure container, a locking sealing device is adopted in the connecting portion of a furnace cover and a furnace body, the smelting chamber and an atomizing tank are designed into cavities which are isolated mutually and communicate only through the flow guide nozzle, and the fine powder yield of the metal powder is effectively increased. Compared with the existing gas atomizing metal powder preparing technology, the fine powder yield of the metal powder prepared by the utilization of the method is high, size distribution is narrow, the sphericity degree is good, the oxygen content is small, atomized gas consumption is low, and the technology equipment is simple, high in continuity and suitable for industrialized production and can be widely applied.
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...
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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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