Shi Zhenhua, Xu Hong, Zhang Guowei, Liu Yijun, Ren Xiaoyan
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China.
Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China.
Materials (Basel). 2023 Oct 11;16(20):6658. doi: 10.3390/ma16206658.
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.
为了减少具有高摩擦性能的铜锡合金中有毒铅元素的使用，采用重力铸造法制备了不同铋含量的Cu-xBi-10Sn合金，并研究了铋含量对铜锡合金微观结构、力学性能和磨损性能的影响。结果表明，铋元素以带状或长条状分布在枝晶臂上，且未与其他元素形成化合物。随着铋含量的增加，Cu-xBi-10Sn合金的硬度和抗拉强度呈现先增加后降低的趋势。当铋含量为7 wt.%时，获得了最大硬度值，其极限抗拉强度接近Cu-10Pb-10Sn合金。与Cu-10Pb-10Sn合金相比，Cu-7Bi-10Sn合金在油润滑条件下也具有更好的减摩和耐磨性能。
