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Production method for low-apparent density brass powder

A production method and technology of brass powder, applied in the field of metallurgy, can solve problems such as segregation of alloy powder, difficulty in mixing uniformly, and large loss of low-melting point zinc, and achieve the effect of stable content, easy control, and uniform mixing

Inactive Publication Date: 2018-08-24
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The brass powder produced by this method mainly has the following problems: one is that the powder is spherical in shape and has a high bulk density, which cannot meet the needs of some industries; It is difficult to mix evenly after melting, resulting in segregation of the alloy powder, which affects the performance of the finished product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1kg of zinc powder and 99kg of electrolytic copper powder, mix them fully in a double-cone rotary mixer, put the mixed materials into a steel belt reduction furnace, heat at 400°C, and carry out diffusion alloying for 3 hours in a hydrogen reducing atmosphere , crushing and screening, adding benzotriazole and mixing evenly, the amount of benzotriazole added is 0.1% of the total mass of powder that meets the requirements obtained through screening and benzotriazole, and the bulk density can be produced. 1.42g / cm 3 of brass powder.

Embodiment 2

[0024] Take 1kg of zinc powder and 99kg of electrolytic copper powder, mix them fully in a double-cone rotary mixer, put the mixed materials into a steel belt reduction furnace, heat at 500°C, and put them in a reducing atmosphere of mixed gas of hydrogen and nitrogen. Diffusion alloying for 6 hours, crushing and sieving, adding benzotriazole and mixing evenly, the amount of benzotriazole added is 0.5% of the total mass of powder that meets the requirements obtained through screening and benzotriazole, and the product can be produced The bulk density is 1.93g / cm 3 of brass powder.

Embodiment 3

[0026] Take 1kg of zinc powder and 99kg of electrolytic copper powder, mix them fully in a double-cone rotary mixer, put the mixed materials into a steel belt reduction furnace, heat at 600°C, and place them in a reducing atmosphere of a mixed gas of hydrogen and argon , Diffusion alloying for 8 hours, crushing and sieving, adding benzotriazole and mixing evenly, the amount of benzotriazole added is 0.1% of the total mass of powder that meets the requirements obtained through screening and benzotriazole, and it can be produced The bulk density is 2.48g / cm 3 of brass powder.

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Abstract

The invention relates to a production method for low-apparent density brass powder. The production method comprises the steps that (1) an electrolytic copper powder finished product and zinc powder are evenly mixed; (2) after reducing atmosphere is led into materials obtained after mixing in the step (1), heating is carried out, and alloy powder is obtained; and (3) the alloy powder obtained in the step (2) is crushed and screened, obtained powder is added into an antioxidant to be evenly mixed, and brass powder is obtained. The production method has the beneficial effects that through mechanical mixing of the zinc powder and the electrolytic copper powder, even mixing can be guaranteed to a large extent, and the follow-up even alloying is further guaranteed; a diffusion-alloying technology is adopted, and it can be guaranteed that the content of zinc in the alloy powder is stable and easy to control; and the cathode copper powder with different low-apparent densities and different technological conditions are selected, the apparent density of the alloying powder can be manually controlled, and requirements of different industries are met.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production method of brass powder with low bulk density. Background technique [0002] Brass powder is used as an additive in powder metallurgy, friction, anti-friction materials, diamond tools and chemical industry. At present, almost all brass powder available in the market is produced by atomization. The brass powder produced by this method mainly has the following problems: one is that the powder is spherical in shape and has a high bulk density, which cannot meet the needs of some industries; It is difficult to mix evenly after melting, resulting in segregation of the alloy powder, which affects the performance of the finished product. Contents of the invention [0003] Aiming at the deficiencies in the prior art above, the present invention provides a method for producing brass powder with low bulk density. [0004] The present invention is achieved through the fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04
CPCB22F1/0003B22F9/04B22F2999/00B22F2998/10B22F1/142B22F1/10B22F2201/01
Inventor 刘兆刚卢苏君陈茜朱爱云
Owner JINCHUAN GROUP LIMITED
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