Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第6期    总第243期    2019年6月

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文章编号:1004-0609(2019)-06-1226-07
微量元素Cd对锡基轴承合金SnSb11Cu6组织与力学性能的影响
陈永红1,钟 宁1,尹忠慰2,李虎林2,董 琴2

(1. 重庆跃进机械厂有限公司,重庆 402169;
2. 上海交通大学 机械与动力工程学院,上海 200240
)

摘 要: 为了改善锡基轴承合金的承载能力,采用X射线衍射分析、光学显微分析、硬度分析和材料拉伸和压缩试验等分析技术研究微量元素Cd对锡基轴承合金SnSb11Cu6的微观组织和力学性能的影响。结果表明:Cd加入合金后,并未改变合金的物相组成。合金中硬质相SnSb尺寸减小,数目增多,说明Cd能起到细化SnSb相的作用,增强合金的硬度、强度和塑性;同时,Cd溶于Sn形成固溶体能提高合金的硬度和强度,但降低合金的塑性。Cd加入到合金SnSb11Cu6中,起到细晶强化和固溶强化的作用。当Cd的含量在0.5%(质量分数)左右时,合金的硬度、强度和塑性同时增加,考虑合金的综合性能,推荐优选的Cd含量为0.5%~1.0%。

 

关键词: Cd;SnSb11Cu6;显微组织;力学性能;强化机理

Effects of micro-adding Cd on microstructure and mechanical properties of SnSb11Cu6 tin-based bearing alloy
CHEN Yong-hong1, ZHONG Ning1, YIN Zhong-wei2, LI Hu-lin2, DONG Qin2

1. Chongqing Yuejin Machinery Co., Ltd., Chongqing 402169, China;
2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Abstract:In order to improve the load capacity of tin-based bearing alloys, this paper investigated the effects of micro-additive Cd on the microstructure and mechanical properties of SnSb11Cu6 tin-based bearing alloy were investigated by X-ray diffractometry, optical microscopy, hardness analysis, tensile and compressive test and other analysis techniques.The results indicate that the addition of Cd does not change the phases of the alloy, whereas it can decrease the size and increase the number of SnSb hard grains, indicating that Cd has an effect on refining SnSb phase, and further increases the hardness, strength, and plasticity of SnSb11Cu6. Meanwhile, the formation of solid solution (Cd in Sn) improves the hardness and strength of the alloy, whereas reduces the plasticity of SnSb11Cu6. When the content of Cd is about 0.5% (mass fraction), the hardness, strength, and plasticity of the alloy increase. Considering the comprehensive performance of the alloy, the priority content of Cd is about 0.5%-1.0%.

 

Key words: Cd; SnSb11Cu6; microstructure; mechanical property; strengthening mechanism

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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