Effects of Undercooling on Microstructure and Properties of Cu-20Pb Hypomonotectic Alloy

Yu Ting; Wang Dongxin; Qin Chun; Li Ning; Geng Guihong

doi:10.15980/j.tzzz.2018.11.029

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Effects of Undercooling on Microstructure and Properties of Cu-20Pb Hypomonotectic Alloy
Vol. 38, Issue 11, Pages: 1271-1274(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.11.029

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[1]余挺,王东新,秦春,李宁,耿桂宏.深过冷对Cu-20Pb亚偏晶合金组织和性能的影响[J].特种铸造及有色合金,2018,38(11):1271-1274.

Yu Ting, Wang Dongxin, Qin Chun, et al. Effects of Undercooling on Microstructure and Properties of Cu-20Pb Hypomonotectic Alloy. [J]. Special Casting & Nonferrous Alloys 38(11):1271-1274(2018)
[1]余挺,王东新,秦春,李宁,耿桂宏.深过冷对Cu-20Pb亚偏晶合金组织和性能的影响[J].特种铸造及有色合金,2018,38(11):1271-1274. DOI： 10.15980/j.tzzz.2018.11.029.

Yu Ting, Wang Dongxin, Qin Chun, et al. Effects of Undercooling on Microstructure and Properties of Cu-20Pb Hypomonotectic Alloy. [J]. Special Casting & Nonferrous Alloys 38(11):1271-1274(2018) DOI： 10.15980/j.tzzz.2018.11.029.

摘要

在常规条件和深过冷条件下分别制备Cu-20Pb亚偏晶合金

分析偏晶合金的组织结构和相组成

并研究了合金的摩擦磨损性能和显微硬度。结果表明

常规条件下制备的偏晶合金

主要由基体α-Cu和β-Pb相组成

组织均匀性差;深过冷处理后

偏析情况得到改善

组织致密、晶粒细小。摩擦磨损试验表明

深过冷处理后Cu-20Pb亚偏晶合金摩擦因数和磨损量均得到降低

耐磨性能良好。显微硬度测试表明

深过冷下Cu-20Pb亚偏晶合金的硬度(HV

0.49

)增至57.02

相比常规条件下的合金提高了24.15%。

Abstract

Cu-20Pb hypomonotectic alloys were prepared under normal and undercooling conditions

and the structure and phase composition

microhardness as well as anti-friction properties of the Cu-20Pb hypomonotectic alloys were analyzed.The results show that Cu-20Pb hypomonotectic alloys under normal conditions are mainly composed ofα-Cu andβ-Pb with less uniformity

while under undercooling conditions

the segregation in hypomonotectic alloys is inhibited and grains are refined with compound dendrite.The friction wear testing indicates that Cu-20Pb hypomonotectic alloys prepared at undercooling condition presents the lower friction coefficient and wear rate with the betetr wear resistance.Microhardness testing shows that the hardness of Cu-20Pb hypomonotectic alloy is increased to 57.02GPa undercooling condition

increased by 24.15%.