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Preparation method of high-performance CuSn10 powder for oil-containing bearing

A high-performance, bearing technology, applied in the field of metal powder, can solve the problems of unstable sintering dimensional change rate, large deviation of product dimensional accuracy, unstable oil output of lubricating oil, etc., to achieve uniform atomized particles and primary particles, forming performance Excellent, uniform and fine pore distribution

Pending Publication Date: 2019-11-01
铜陵鑫佳粉体新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is prone to segregation due to the difference in specific gravity, particle size, and shape of copper powder and tin powder. After pressing and forming, the sintering size change rate is unstable, and the dimensional accuracy of the product has a large deviation.
[0005] In foreign countries, the bronze powder produced by the diffusion method of SCM Metal Products Co., Ltd. in the United States, Makin Metal Powders (UK) Limited in the United Kingdom, Fukuda High-tech Metal Powder in Japan, etc., has excellent formability and excellent green strength, and has been obtained in a wide range. Popularization, but its microscopic pores are poorly controlled, and the local oil content is uneven. During high-speed operation, the lubricating oil in the pores is unstable, resulting in low life. Therefore, there are certain restrictions on the application of ultra-fine high-speed oil-impregnated bearings. Therefore, we design a preparation method of high-performance CuSn10 powder for oil-impregnated bearings

Method used

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  • Preparation method of high-performance CuSn10 powder for oil-containing bearing
  • Preparation method of high-performance CuSn10 powder for oil-containing bearing
  • Preparation method of high-performance CuSn10 powder for oil-containing bearing

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Effect test

Embodiment 1

[0027] The invention discloses a preparation method of high-performance CuSn10 powder for oil-impregnated bearings. The specific preparation steps are as follows:

[0028] (1) Melting CuSn5 tin bronze ingots into alloy liquid, and adopting a high-pressure atomization method above 100Mpa to prepare CuSn5 alloy powder, the particle size of the prepared CuSn5 alloy powder is ≤45um;

[0029] (2) Dry the CuSn5 alloy powder prepared by atomization in a belt drying furnace at 200 ° C. After drying, weigh the CuSn5 alloy powder with a weight ratio of 95%, and weigh the particle size with a weight ratio of 5%. For tin powder with a size ≤45um, the belt drying furnace is TJGD belt drying furnace;

[0030] (3) The CuSn5 alloy powder with a weight ratio of 95% is subjected to oxygen calcination treatment to obtain oxidized CuSn5 alloy powder with an oxygen content of 10%. The calcination process adopts a DHZY rotary calcination kiln, and the calcination temperature is controlled at 700°C ...

Embodiment 2

[0038] The invention discloses a preparation method of high-performance CuSn10 powder for oil-impregnated bearings. The specific preparation steps are as follows:

[0039] (1) Melting CuSn5 tin bronze ingots into alloy liquid, and adopting a high-pressure atomization method above 100Mpa to prepare CuSn5 alloy powder, the particle size of the prepared CuSn5 alloy powder is ≤45um;

[0040] (2) Dry the CuSn5 alloy powder prepared by atomization in a belt drying furnace at 250 ° C. After drying, weigh the CuSn5 alloy powder with a weight ratio of 95%, and weigh the CuSn5 alloy powder with a weight ratio of 5%. For tin powder with particle size ≤45um, the belt drying furnace is TJGD belt drying furnace;

[0041] (3) The CuSn5 alloy powder with a weight ratio of 95% is subjected to oxygen calcination treatment to obtain oxidized CuSn5 alloy powder with an oxygen content of 13%. The calcination process adopts a DHZY rotary calcination kiln, and the calcination temperature is controll...

Embodiment 3

[0049] The invention discloses a preparation method of high-performance CuSn10 powder for oil-impregnated bearings. The specific preparation steps are as follows:

[0050] (1) Melting CuSn5 tin bronze ingots into alloy liquid, and adopting a high-pressure atomization method above 100Mpa to prepare CuSn5 alloy powder, the particle size of the prepared CuSn5 alloy powder is ≤45um;

[0051] (2) Dry the CuSn5 alloy powder prepared by atomization in a belt drying furnace at 300 ° C. After drying, weigh the CuSn5 alloy powder with a weight ratio of 95%, and weigh the CuSn5 alloy powder with a weight ratio of 5%. For tin powder with particle size ≤45um, the belt drying furnace is TJGD belt drying furnace;

[0052] (3) The CuSn5 alloy powder with a weight ratio of 95% is subjected to oxygen calcination treatment to obtain oxidized CuSn5 alloy powder with an oxygen content of 15%. The calcination process adopts a DHZY rotary calcination kiln, and the calcination temperature is controlled...

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Abstract

The invention discloses a preparation method of high-performance CuSn10 powder for an oil-containing bearing. The method specifically comprises the following steps: preparing CuSn5 alloy powder by adopting a high-pressure atomization method of 100 Mpa or above; drying the atomized CuSn5 alloy powder in a belt drying furnace, weighing 95% by weight of CuSn5 alloy powder after drying, and weighing 5% by weight of tin powder with particle size smaller than or equal to 45 microns; introducing oxygen for calcining the CuSn5 alloy powder with the weight ratio of 95%; uniformly mixing the oxidized CuSn5 alloy powder with 5% by weight of the tin powder with the particle size smaller than or equal to 45 microns in the step (2), and adding the mixture into a reduction furnace for reduction treatment; crushing the reduced CuSn10 alloy powder; sieving the crushed reduced CuSn10 alloy powder through a screen of 150 microns; and adding the screened CuSn10 alloy powder into a mixer, and adding 0.5-0.7% by weight of zinc stearate to be uniformly mixed with the CuSn10 alloy powder. By adopting the technical scheme, the prepared CuSn10 alloy powder is excellent in performance, uniform in particle size distribution and difficult to segregate.

Description

technical field [0001] The invention relates to the technical field of metal powders, in particular to a preparation method of high-performance CuSn10 powder for oil-impregnated bearings. Background technique [0002] As a national pillar industry, powder metallurgy has been vigorously developed. It is estimated that the consumption of powder metallurgy products in my country will increase year by year. The preparation of high-end powder has become an inevitable trend. Copper-based powder has broad market prospects. [0003] Due to its special structure, the oil-impregnated bearing does not need to consume lubricating oil during the movement, so it is very suitable for occasions where oil supply is difficult and lubricating oil pollution is avoided. , electric tools and other indispensable parts for the development. The production of domestic CuSn10 alloy powder is mainly based on the industry standard JB / T7380-2010, and the water atomization method is mainly used to produc...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F9/22B22F9/04B22F1/00
CPCB22F9/08B22F9/22B22F9/04B22F1/05
Inventor 胡柏明
Owner 铜陵鑫佳粉体新材料科技有限公司
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