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Method for preparing tin-base bearing alloy

A tin-based bearing alloy and metal technology, applied in the field of bearing alloys, can solve the problems of low strength, hardness and fatigue strength, and achieve the effects of increasing service life, reducing the solidification temperature range, and reducing pore defects

Inactive Publication Date: 2009-10-14
上海飞轮有色冶炼厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is suitable for high-speed bearings of automobiles, tractors, steam turbines, etc., and important bearings with heavy loads and high-speed operating temperatures below 110°C. For example, high-speed steam engines above 1400KW, turbo compressors above 360KW and engine bearings above 880KW are basically made of tin-based bearings. Alloys, tin-based alloys have excellent properties such as high anti-friction performance, good embedding and friction compliance, but their strength, hardness and fatigue strength are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First add 2.947Kg of tin, 385g of copper and 700g of antimony into the crucible and heat up to melt. When it reaches 530°C, add 21g of zinc until it is completely melted. Finally, add 2.947Kg of tin. After the alloy is completely melted, stir evenly and let it stand for 15 minutes. The alloy is cast into an ingot at 400°C.

Embodiment 2

[0022] First add 2.5Kg of tin, 340g of copper and 660g of antimony into the crucible to heat up and melt, then add 5.5g of silver when the temperature reaches 530°C, add 33g of zinc after the silver is melted until it is completely melted, and finally add

[0023] 2.5Kg tin, the alloy is completely melted, stirred evenly, and left to stand for 15 minutes, and the alloy is cast into an ingot at 400°C.

Embodiment 3

[0025] First add 3.975Kg of tin, 650g of copper and 1.3kg of antimony into the crucible to heat up and melt, then add 20g of silver when it reaches 530°C, add 80g of zinc after the silver is melted until it is completely melted, and finally add 3.975Kg of tin, and the alloy is completely melted After finishing stirring evenly, let it stand for 15 minutes, and the alloy is cast into an ingot at 400°C.

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PUM

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Abstract

The invention provides a tin-based bearing alloy, which is composed of copper with a weight percentage of 5.5% to 6.5%, antimony with a weight percentage of 10% to 13%, zinc and tin with a weight percentage of 0.3% to 0.8%, The present invention also provides a preparation method of the tin-based bearing alloy. First, 50% tin, all copper and antimony are put into a furnace for mixing and melting, and after complete melting, all zinc is added at 500-550°C. After the zinc is completely melted, add the remaining tin. After the alloy is completely melted, stir and stand for 15-30 minutes. The final casting temperature is 360-450°C. The invention improves the strength and hardness of the tin-based alloy, can reduce the solidification temperature range, improve the fluidity, reduce the dispersed shrinkage cavity, reduce the gas content in the alloy liquid, and reduce the pore defects in the casting. The corrosion resistance, oxidation resistance and uniformity of the alloy improve the toughness and strength of the alloy.

Description

technical field [0001] The invention relates to a bearing alloy, in particular to a method for manufacturing a tin-based bearing alloy. Background technique [0002] It is suitable for high-speed bearings of automobiles, tractors, steam turbines, etc., and important bearings with heavy loads and high-speed operating temperatures below 110°C. For example, high-speed steam engines above 1400KW, turbo compressors above 360KW and engine bearings above 880KW are basically made of tin-based bearings. Alloy, tin-based alloy has excellent properties such as high anti-friction performance, good embedding and friction compliance, but its strength, hardness and fatigue strength are all low. Contents of the invention [0003] The purpose of the present invention is to provide a method for manufacturing tin-based bearing alloy, which can solve the technical problem of low strength, hardness and fatigue strength of tin-based alloy in the prior art. [0004] The present invention provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C13/02C22C1/02
Inventor 沈嘉麟顾秀峰吴建华张忠民韩鹰孙飞黄惠民朱卫敏
Owner 上海飞轮有色冶炼厂
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