Effect of Bi Content on the Microstructure, Mechanical and Tribological Properties of Cu-Sn Alloy
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Published:2023-10-11
Issue:20
Volume:16
Page:6658
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ISSN:1996-1944
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Container-title:Materials
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language:en
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Short-container-title:Materials
Author:
Shi Zhenhua1, Xu Hong1, Zhang Guowei1, Liu Yijun1, Ren Xiaoyan2
Affiliation:
1. School of Materials Science and Engineering, North University of China, Taiyuan 030051, China 2. Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China
Abstract
To reduce the use of the toxic Pb element in the Cu-Sn alloy with high friction performance, Cu-xBi-10Sn alloys with different Bi contents were prepared by gravity casting, and the effect of Bi content on the microstructure, mechanical properties and wear property of Cu-Sn alloys were studied. The results showed that the Bi element was distributed in bands or long strips on the dendritic arms and did not form compounds with other elements. With the increase in Bi content, the hardness and tensile strength of Cu-xBi-10Sn alloys present a trend of increasing first and then decreasing. When the Bi content was 7 wt.%, the maximum hardness value was obtained, and the ultimate tensile strength was close to that of Cu-10Pb-10Sn alloy. Compared with Cu-10Pb-10Sn alloy, Cu-7Bi-10Sn alloy also possessed better friction reduction and wear resistance under the oil lubrication condition.
Funder
Fundamental Research Program of Shanxi Province Opening Project of Shanxi Key Laboratory of Controlled Metal Solidification and Precision Manufacturing, North University of China
Subject
General Materials Science
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