A kind of production method of premixed copper tin 10 bronze

A production method and pre-mixing technology, applied in the field of powder metallurgy, can solve the problems of electrolytic copper powder unfavorable sintering, high energy consumption, high pollution, etc., and achieve the effects of avoiding component segregation, good pore distribution, and high sintering strength

Active Publication Date: 2018-01-30
湖南省天心博力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of electrolytic copper powder is a high-pollution and high-energy-consuming copper powder production method, and electrolytic copper powder is not conducive to sintering. The dendritic structure of electrolytic copper powder is easy to form closed pores during sintering.

Method used

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  • A kind of production method of premixed copper tin 10 bronze

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of raw copper powder: Copper powder is atomized by water with a conical spray plate, with 30 spray holes, the diameter of the spray hole is 1.0mm, the water pressure of the spray plate is 15MPa, the particle size of the copper powder is less than 100μm, and the shape of the copper powder is Irregular in appearance, bulk density is 2.0-2.6 g / cm 3 ;The atomized copper powder is heat treated in a heat treatment furnace, the heat treatment temperature is 500°C, the heat treatment atmosphere is reducing atmosphere, and the heat treatment time is 30 minutes; then the powder is crushed and oxidized and sieved, and the antioxidant is selected to passivate the copper powder with a volatilization temperature above 300°C agent, sieve to get raw copper powder less than 150um;

[0024] (2) Mix the raw materials copper powder and tin powder according to the ratio of 9:1, and mix them evenly in the batch machine, and the bulk density of the tin powder is less than 3.5g...

Embodiment 2

[0030] (1) Preparation of raw copper powder: Copper powder is atomized by water with a conical spray plate, with 30 spray holes, the diameter of the spray hole is 1.0mm, the water pressure of the spray plate is 15MPa, the particle size of the copper powder is less than 100μm, and the shape of the copper powder is Irregular in appearance, bulk density is 2.0-2.6 g / cm 3 ;The atomized copper powder is heat treated in a heat treatment furnace, the heat treatment temperature is 500°C, the heat treatment atmosphere is reducing atmosphere, and the heat treatment time is 30 minutes; then the powder is crushed and oxidized and sieved, and the antioxidant is selected to passivate the copper powder with a volatilization temperature above 300°C agent, and sieve to obtain raw copper powder less than 150 μm;

[0031] (2) Mix raw copper powder and tin powder according to the ratio of 9:1, and mix them evenly in the batch machine. Among them, the bulk density of tin powder is less than 3.5g / ...

Embodiment 3

[0037] (1) Preparation of raw copper powder: Copper powder is atomized by water with a conical spray plate, with 30 spray holes, the diameter of the spray hole is 1.0mm, the water pressure of the spray plate is 15MPa, the particle size of the copper powder is less than 100μm, and the shape of the copper powder is Irregular in appearance, bulk density is 2.0-2.6 g / cm 3 ;The atomized copper powder is heat treated in a heat treatment furnace, the heat treatment temperature is 500°C, the heat treatment atmosphere is reducing atmosphere, and the heat treatment time is 30 minutes; then the powder is crushed and oxidized and sieved, and the antioxidant is selected to passivate the copper powder with a volatilization temperature above 300°C agent, and sieve to obtain raw copper powder less than 150 μm;

[0038] (2) Mix raw copper powder and tin powder according to the ratio of 9:1, and mix them evenly in the batch machine. Among them, the bulk density of tin powder is less than 3.5g / ...

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Abstract

The invention discloses a production method of premixed copper-tin-10 bronze. Copper powder is atomized with water by using a conical spray plate, and then heat-treated. The heat-treated copper powder is crushed and oxidized, and sieved to obtain raw copper powder; The prepared copper powder and tin powder are mixed evenly according to the mass fraction; heat treatment is carried out in a reducing atmosphere, and the copper powder particles and tin powder particles are diffusely bonded during heat treatment; the heat treatment powder is crushed and sieved to obtain powder; lubricant is added and mixed uniform. The mixed bronze powder produced by the present invention uses water-atomized copper powder with an irregular shape and then undergoes heat treatment, so that the raw material copper powder has good toughness and avoids component segregation of the bronze powder. In addition, the water-atomized copper powder is easy to form after sintering Connected pores, and the production of copper powder by water atomization will not pollute the environment. The premixed bronze prepared by the invention has no component segregation, stable bulk density, good formability, high sintering strength and good pore distribution in sintering.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a production method of premixed copper-tin-10 bronze. Background technique [0002] Copper-tin-bronze self-lubricating bearings have the characteristics of strong corrosion resistance, high strength, low noise and long life, and are now the basic parts in the mechanical field. Copper tin 10 bronze powder is the main raw material for making self-lubricating bearings. Copper tin 10 bronze powder is divided into pre-mixed bronze powder and alloy bronze powder. Mixed bronze powder is to mix copper powder and tin powder according to the ratio of 9:1, so the production method is simple and the production efficiency is high, but the disadvantage of this production method is that the tin powder is easy to segregate, and the segregated parts in the parts sintered with the bronze powder Tin melting is prone to large pores, which affects the pore distribution and sintering strength of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C9/02
CPCC22C9/02B22F1/05B22F1/10B22F1/142
Inventor 张拥军莫文剑杨丛红易翠钟耀宗
Owner 湖南省天心博力科技有限公司
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