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Method for preparing copper-tin alloy powder through diffusion

A copper-tin alloy and diffusion alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of sintering segregation and coarsening, uneven phase structure, affecting the performance of tool carcass, etc., to prevent component segregation, reduce The yield of finished products and the effect of increasing production costs

Pending Publication Date: 2022-01-28
HENAN HUANGHE WHIRLWIND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the coarse particle size of elemental Sn, it is easy to cause sintering segregation and coarsening, resulting in uneven phase structure and affecting the performance of the tool matrix

Method used

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  • Method for preparing copper-tin alloy powder through diffusion
  • Method for preparing copper-tin alloy powder through diffusion
  • Method for preparing copper-tin alloy powder through diffusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing copper-tin alloy powder by diffusion, comprising the following steps:

[0037] Step 1: Weighing 89.7% of copper powder, 10% of tin powder, and 0.3% of copper-gadolinium alloy powder in terms of mass percentages, and mixing them; wherein, the copper powder is electrolytic copper powder with a particle size of -200 to -400 mesh; The tin powder is atomized tin powder, with a particle size of -200 to -400 mesh; the particle size of copper-gadolinium alloy powder is -400 to -600 mesh (among them, adding a minus sign before the mesh number means that it can pass through the mesh of the mesh, such as -200 mesh: can pass through 200 mesh sieve).

[0038] Step 2: Add the mixed powder into a dry ball mill for ball milling, the mass ratio of the balls to the mixed powder is 7:3, the ball milling time is 8h, and the ball milling speed is 80r / min; the diameter of the balls is The weight ratio of the three diameters is The material of the grinding ball is 3...

Embodiment 2

[0044] A method for preparing copper-tin alloy powder by diffusion, comprising the following steps:

[0045] Step 1: Weighing 84.5% of copper powder, 15% of tin powder, and 0.5% of copper-gadolinium alloy powder according to mass percentage, and mixing them; wherein, the copper powder is electrolytic copper powder with a particle size of -200 to -400 mesh; The tin powder is atomized tin powder with a particle size of -200 to -400 mesh; the particle size of copper gadolinium alloy powder is -400 to -600 mesh.

[0046] Step 2: Add the mixed powder into a dry ball mill for ball milling, the mass ratio of the balls to the mixed powder is 7:3, the ball milling time is 6h, and the ball milling speed is 65r / min; the diameter of the balls is The weight ratio of the three diameters is The material of the grinding ball is 304 stainless steel;

[0047] Step 3: Put the mixed powder after ball milling into the reduction furnace for diffusion. The protective atmosphere is hydrogen-nitro...

Embodiment 3

[0052] A method for preparing copper-tin alloy powder by diffusion, comprising the following steps:

[0053] Step 1: Weighing 79.2% of copper powder, 20% of tin powder, and 0.8% of copper-gadolinium alloy powder according to mass percentage, and mixing them; wherein, the copper powder is electrolytic copper powder with a particle size of -200 to -400 mesh; The tin powder is atomized tin powder with a particle size of -200 to -400 mesh; the particle size of copper gadolinium alloy powder is -400 to -600 mesh.

[0054] Step 2: Add the mixed powder into a dry ball mill for ball milling, the mass ratio of the balls to the mixed powder is 3:2, the ball milling time is 6h, and the ball milling speed is 60r / min; the diameter of the balls is The weight ratio of the three diameters is The material of the grinding ball is 304 stainless steel;

[0055] Step 3: Put the mixed powder after ball milling into the reduction furnace for diffusion. The protective atmosphere is hydrogen-nitro...

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Abstract

The invention provides a method for preparing copper-tin alloy powder through diffusion. The method comprises the following steps that 1, weighing and mixing 49%-95% of copper powder, 4%-50% of tin powder and 0.1%-1% of copper-gadolinium alloy powder; 2, carrying out ball milling, wherein the mass ratio of milling balls to the mixed powder is 7: 3-3: 2, the ball milling time is 3-8 h, and the ball milling rotating speed is 50-80 r / min; 3, carrying out diffusion, wherein the protective atmosphere is hydrogen and nitrogen mixed gas, and the diffusion temperature of a reduction furnace is 200-500 DEG C; 4, crushing; and 5, after screening and anti-oxidation treatment, obtaining diffused copper-tin alloy powder. The obtained copper-tin alloy powder is uniform and stable in particle size, wide in sintering process window, fine and smooth in structure and good in cold press formability, the use proportion of the copper-tin alloy powder in diamond tools is increased, the problem of composition segregation of the copper-tin alloy powder is solved, the problem can be effectively solved, and the copper-tin alloy powder is widely applied to the diamond tools.

Description

technical field [0001] The invention relates to a method for preparing copper-tin alloy powder by diffusion, belonging to the technical field of metal material powder metallurgy. Background technique [0002] In recent years, metal pre-alloyed powders have been widely used in various fields of superhard material tool production, and the application volume has gradually expanded and shown a momentum of rapid development. At present, the application fields with large consumption of pre-alloyed powder are concentrated in stone and ceramic processing tools, and the consumption accounts for more than 80% of the total market. Among them, copper-tin alloy powder is widely used in powder metallurgy oil bearings, diamond tools, filters, powder metallurgy products, bearing materials and other industries. Because copper-tin alloy powder has the characteristics of low oxygen content, fine particle size, and good compressibility, it is often used as a special powder for diamond tools su...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/142B22F1/145B22F1/052
CPCB22F9/04B22F2009/043
Inventor 武玺旺赵小超李伟祥张世锋姜平伟尚鹏举杨栋赵常青索江飞李长青马海峰刘亚州
Owner HENAN HUANGHE WHIRLWIND CO LTD
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