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Preparation method and production equipment of high-sphericity gas atomization powder

A production equipment and high sphericity technology, applied in the field of powder metallurgy, can solve the problems of low sphericity, the sphericity of gas atomized powder needs to be further improved, and easy to produce coated balls, etc., to achieve high sphericity, increase expansion, and improve The effect of surface energy

Pending Publication Date: 2021-03-19
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the metal powders produced by the existing gas atomization powder making methods and production equipment have the problems of low spherical rate and easy to produce coated balls, and the sphericity of the gas atomized powder needs to be further improved

Method used

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  • Preparation method and production equipment of high-sphericity gas atomization powder
  • Preparation method and production equipment of high-sphericity gas atomization powder
  • Preparation method and production equipment of high-sphericity gas atomization powder

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Embodiment 1

[0044] The metal powder was prepared by the above-mentioned preparation method and production equipment. Each experimental sample used different liquid outlet diameters, liquid flow rates of the melt, and atomizing gas medium temperature to verify the influence of each process parameter on the powder-making effect. The following experimental samples The preparation method comprises the following steps:

[0045] (1) Smelting: After preparing industrial pure iron, metal silicon, and pure aluminum particles according to the mass percentage of 85%, 9.6%, and 5.4%, they are sequentially added to the induction furnace for vacuum melting, and the temperature is raised. After the heat preservation operation, the molten steel meets After the request, the molten steel is poured, and the molten steel flows down from the leaking bag;

[0046] (2) Atomization: After preheating the nitrogen gas to the design temperature, the nitrogen gas is passed into the atomizing nozzle 21 to atomize the...

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Abstract

The invention provides a preparation method and production equipment of high-sphericity gas atomization powder. The preparation method comprises the following steps: preheating atomization medium gasto 200-300 DEG C, and then introducing the atomization medium gas into an atomization spray tray to perform gas atomization on a metal melt flowing out of a liquid outlet. wherein the caliber of the liquid outlet is 4.5-5.0 mm, and the liquid flow velocity of the melt flowing out of the liquid outlet is 9-15 kg / min. The production equipment for the preparation method comprises a smelting mechanismand an atomizing mechanism, the smelting mechanism is used for smelting metal raw materials, and the atomizing mechanism is used for atomizing the melt flowing out of the liquid outlet of the smelting mechanism, wherein the caliber of the liquid outlet is 4.5-5.0 mm. The atomizing mechanism comprises an atomization spray tray and a gas supply unit, the gas supply unit is used for supplying an atomization gas medium to the atomization spray tray, and the gas supply unit comprises a preheating device used for preheating the atomization gas medium to 200-300 DEG C. The preparation method and theproduction equipment can effectively improve the degree of sphericity of the metal powder prepared by the gas atomization method.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method and production equipment of high-sphericity gas-atomized powder. Background technique [0002] Gas atomization powder making is one of the main methods of metal powder preparation. The basic process of gas atomization powder making technology is that the metal melt flowing out of the draft tube is impacted by the atomization medium gas flow ejected from the atomization spray plate. Firstly, disturbance occurs on the surface of the melt, which makes the originally stable flowing molten metal become unstable, and gradually develops into a wavy shape, forming metal strips. The atomizing gas continues to act on the metal strip, causing it to undergo secondary breakage to form fine droplets, which become spherical under the action of surface tension and then solidify into metal powder. [0003] However, most of the metal powders produced by ...

Claims

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Application Information

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IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0832
Inventor 庞靖张雪松董杰魏文喜
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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