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Preparation method for high-blank, high-stability and environmental-protection diffused tin zinc copper powder

A high-stability, diffusion-type technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as restricting product performance, high bulk density, poor composition uniformity and stability, and achieve low production costs and reduced The effect of high loose ratio and high product stability

Active Publication Date: 2019-08-09
ANHUI XINJIA COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thermal diffusion tin-zinc-copper powder (CuSn6Zn6) is a lead-free copper alloy powder developed in recent years. It has excellent formability, high green strength, and stable sintered size change. It has broad market prospects and is popular among domestic and foreign copper powder manufacturers. Take it as a key research object, such as Fukuda Metal Foil Powder Industry Co., Ltd. of Japan, ACuPowder International of the United States and China Youyan Powder New Material Co., Ltd., etc., but the existing products have high bulk density, poor composition uniformity and stability, and are seriously Restricting product performance, for this reason, we propose a preparation method of high green body, high stability and environmental protection diffusion tin-zinc-copper powder

Method used

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Effect test

Embodiment 1

[0026] A method for preparing a high-green body high-stability environment-friendly diffusion tin-zinc-copper powder, the preparation method of the high-green body high-stability environment-friendly diffusion type tin-zinc-copper powder comprises the following steps:

[0027] (1) Raw material selection: Select secondary resources such as high-purity copper, zinc and copper-tin alloy scraps in a certain number of parts for standby;

[0028] (2) Formation of low-porosity pre-alloyed powder: High-purity low-porosity copper powder and copper-tin-zinc alloy powder are prepared by water atomization, and the particle shape is irregular by adjusting the parameters of the atomization process, and the particle size is improved. Hollowness, the resulting pre-alloyed powder has a regular porous shape and a loose specific density lower than 2.0g / cm³;

[0029] (3) Achieving high green strength: through the "solid-solid" two-phase thermal diffusion process, adding an appropriate amount of s...

Embodiment 2

[0032] The high green body, high stability and environmental protection diffusion type tin-zinc-copper powder with low porosity ratio pre-alloyed powder adopts solid diffusion technology to produce the tin-zinc-copper powder. In the selection of materials, the combination of CuSnZn alloy powder + CuSn alloy powder + Cu powder is used. The form is the basic material. By adjusting the parameters of the atomization process, the particle shape is irregular, the hollowness of the particles is improved, and the pre-alloyed shape is regular and porous, and the loose specific density of the hollowness is lower than 2.0g / cm³. powder;

[0033] The process control measures in the production of the low loose ratio pre-alloyed powder include the following steps:

[0034] (1) The degree of superheat of the metal melt: the greater the degree of superheat, the smaller the surface tension of the molten metal, the easier it is for the first droplet to form, and the generated particles are finer...

Embodiment 3

[0040] The method for realizing the high green strength alloy powder in the high green body high stability environment-friendly diffusion tin-zinc-copper powder comprises the following steps:

[0041] (1) Using secondary resources such as high-purity copper, zinc and copper-tin alloy scraps as raw materials, the metal solution is obtained by melting in an induction furnace, and the metal solution is degassed and deslagged by blowing argon at the bottom of the furnace, and then left to stand Slag, so that the impurity content in the melt is less than 0.2%, the metal solution is then passed through a special nozzle, and copper powder and copper-tin-zinc alloy powder are prepared by water atomization;

[0042] (2) Water-atomized copper or copper alloy powder has a small amount of oxidation on the surface, so the oxidation-reduction process is used to modify the water-atomized copper powder and copper-tin-zinc alloy powder to further improve its performance. Oxidation-reduction pr...

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Abstract

The invention discloses a preparation method for high-blank, high-stability and environmental-protection diffused tin zinc copper powder. The preparation method for the high-blank, high-stability andenvironmental-protection diffused tin zinc copper powder comprises the following steps: (1) selection of raw materials: a certain mass parts of high-purity copper and zinc and such secondary resourcesas copper tin alloy leftovers are selected for future use; and (2) formation of low-looseness-ratio prealloyed powder: high-purity and low-looseness-ratio copper powder and copper tin zinc alloy powder are prepared through adopting a water atomization method; and parameters of the atomization process are adjusted. Through innovation on such aspects as the production process, the formula technology and the equipment development, and the solid-solid diffused tin zinc copper powder preparation technology, the product stability is high; compared with a traditional diffusion process (copper powder, tin powder and zinc powder mixed diffusion), the method is excellent in uniformity, free of segregation and low in production cost (high cost of the tin powder and the zinc powder); and meanwhile, the method greatly improves the production capacity and the production efficiency, and greatly reduces the equipment investment and the energy consumption.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a preparation method of high-green body, high-stability and environment-friendly diffusion-type tin-zinc-copper powder. Background technique [0002] Thermal diffusion tin-zinc-copper powder (CuSn6Zn6) is a lead-free copper alloy powder developed in recent years. It has excellent formability, high green strength, and stable sintered size change. It has broad market prospects and is popular among domestic and foreign copper powder manufacturers. Take it as a key research object, such as Fukuda Metal Foil Powder Industry Co., Ltd. of Japan, ACuPowder International of the United States, and China Youyan Powder New Material Co., Ltd., etc., but the existing products have high bulk density, poor composition uniformity and stability, and are seriously Restricting product performance, for this reason, we propose a preparation method of high green body, high stability and environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F1/00B22F3/11B22F9/08C22C9/02
CPCB22F9/22B22F9/082C22C9/02B22F3/1143B22F2009/0828B22F2009/088B22F1/10B22F1/14B22F1/145Y02P10/20
Inventor 胡柏明
Owner ANHUI XINJIA COPPER CO LTD
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