Preparation method of copper-tin alloy oil-containing bearing

A copper-tin alloy and bearing technology, which is applied in the field of powder metallurgy, can solve the problems of difficulty in preparing high-porosity oil-impregnated bearings, adverse effects on oil-impregnated bearing performance, easy occurrence of missing corners and cracks, etc., and achieves good plasticity. , The effect of not easy to chip and crack

Active Publication Date: 2019-01-04
罗源县凤山镇企业服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is difficult to prepare oil-impregnated bearings with high porosity using traditional copper-tin alloy powders. At the same time, the green body of oil-impregnated bearings pressed by traditional copper-tin alloy powders has low green strength and is prone to chipped corners and cracks. Performance is adversely affected

Method used

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  • Preparation method of copper-tin alloy oil-containing bearing
  • Preparation method of copper-tin alloy oil-containing bearing
  • Preparation method of copper-tin alloy oil-containing bearing

Examples

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preparation example Construction

[0014] Please refer to figure 1 Shown, the preparation method of a kind of copper-tin alloy oil-impregnated bearing provided by the invention comprises the following steps:

[0015] S1. The copper powder is first oxidized and then reduced to obtain porous copper powder, and the porous copper powder is mixed with tin powder and heated at a temperature of 450°C to 650°C for 5min to 8min to obtain a tin content of 3wt% to 5wt % of the first copper-tin alloy powder;

[0016] S2. Mix the first copper-tin alloy powder with the second copper-tin alloy powder with a tin content of 12wt%-14wt%, to obtain a mixed powder with a tin content of 9.5wt%-10.5wt%;

[0017] S3. After pressing the mixed powder into a green compact, sintering at a temperature of 680° C. to 720° C. for 15 minutes to 25 minutes.

[0018] It can be seen from the above description that after the copper powder is first oxidized and then reduced, a porous copper powder with a rough surface and pores can be obtained. ...

Embodiment 1

[0035] Please refer to figure 1 Shown, embodiment one of the present invention is:

[0036] A preparation method of a copper-tin alloy oil-impregnated bearing, comprising the following steps:

[0037] S1. The copper powder is oxidized first and then reduced to obtain porous copper powder, and the porous copper powder is mixed with tin powder and heated at a temperature of 650° C. for 5 minutes to obtain the first copper-tin alloy powder with a tin content of 3 wt%. ;

[0038] S2. Mix the first copper-tin alloy powder with the second copper-tin alloy powder with a tin content of 14wt%, to obtain a mixed powder with a tin content of 10.5wt%;

[0039] S3. After pressing the mixed powder into a green body, sintering at a temperature of 680° C. for 25 minutes.

Embodiment 2

[0041] A preparation method of a copper-tin alloy oil-impregnated bearing, comprising the following steps:

[0042] S1. The copper powder is oxidized first and then reduced to obtain porous copper powder, and the porous copper powder is mixed with tin powder and heated at a temperature of 550° C. for 6 minutes to obtain the first copper-tin alloy powder with a tin content of 4 wt%. ;

[0043] S2. Mix the first copper-tin alloy powder with the second copper-tin alloy powder with a tin content of 13wt%, to obtain a mixed powder with a tin content of 10wt%;

[0044] S3. After pressing the mixed powder into a green compact, sintering at a temperature of 700° C. for 20 minutes.

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Abstract

The invention relates to a preparation method of a copper-tin alloy oil-containing bearing. The preparation method includes the following steps that S1, copper powder is firstly oxidized and then reduced to obtain porous copper powder, the porous copper powder is mixed with tin powder, then the product is heated for 5-8 min under the temperature of 450 DEG C-650 DEG C, and first copper-tin alloy powder with the tin content being 3wt%-5wt% is obtained; S2, the first copper-tin alloy powder is mixed with second copper-tin alloy powder with the tin content being 12 wt%-14 wt% to obtain mixed powder with the tin content being 9.5 wt%-10.5 wt%; and S3, the mixed powder is sintered for 15-25 min under the temperature of 680 DEG C-720 DEG C after being pressed into green bodies. The made oil-containing bearing is not prone to generating unfilled corners, and has high porosity.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for preparing a copper-tin alloy oil-impregnated bearing. Background technique [0002] Copper-tin alloy powder is the main raw material for the preparation of oil-impregnated bearings. The oil-impregnated bearing has uniformly distributed pores inside, so it has self-lubricating properties after oil-immersion treatment. The performance of the oil-impregnated bearing depends mostly on the properties of the copper-tin alloy powder, among which, the influence of the formability and impurity content of the copper-tin alloy powder on the performance of the oil-impregnated bearing is particularly critical. [0003] It is difficult to prepare oil-impregnated bearings with high porosity by using traditional copper-tin alloy powders. At the same time, the green body of oil-impregnated bearings pressed by traditional copper-tin alloy powders has low green strength and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04B22F3/02B22F3/10B22F5/00C22C9/02C22C1/08
CPCB22F1/0003C22C1/08C22C9/02B22F3/02B22F3/10B22F5/00B22F9/04B22F2009/041B22F1/145C22C1/081
Inventor 林怡满
Owner 罗源县凤山镇企业服务中心
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