电磁模拟微重力+电脉冲复合场作用下Cu-20Pb亚偏晶合金的组织与性能

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英文篇名：Microstructure and Properties of Cu-20Pb Hypomonotectic Alloy under the Electromagnetic Micro-gravity and Pulse Current Compound Field 作者：余挺 ; 耿桂宏 ; 王东新 ; 秦春 英文作者：Yu Ting;Geng Guihong;Wang Dongxin;Qin Chun;College of Materials Science and Engineering,North Minzu University;State Key Laboratory of Special Rare Metal Materials,Northwest Rare Metal Materials Research Institute Ningxia Co.,Ltd.; 关键词：电磁模拟微重力 ; 电脉冲 ; Cu-20Pb亚偏晶合金 ; 组织与性能 英文关键词：Electromagnetic Micro-gravity;;Pulse Current;;Cu-20Pb Hypomonotectic Alloy;;Microstructure and Performance 中文刊名：TZZZ 英文刊名：Special Casting & Nonferrous Alloys 机构：北方民族大学材料科学与工程学院;稀有金属特种材料国家重点实验室西北稀有金属材料研究院; 出版日期：2019-01-20 出版单位：特种铸造及有色合金 年：2019 期：v.39;No.310 基金：国家自然科学基金资助项目(51561001);; 北方民族大学研究生创新实验课题资助项目(YCX18091) 语种：中文; 页：TZZZ201901006 页数：4 CN：01 ISSN：42-1148/TG 分类号：22-25

摘要

在常规和电磁模拟微重力+电脉冲复合场作用下分别制备Cu-20Pb亚偏晶合金,对合金的显微组织、显微硬度、耐磨性能进行分析。结果表明,Cu-20Pb亚偏晶合金由基体α-Cu和基体间的组织β-Pb组成,常规条件下制备的亚偏晶合金基体上存在偏析组织,枝晶较粗,晶粒尺寸大,组织均匀性差;复合场下的亚偏晶合金基体上的偏析组织得到抑制,枝晶变得细小致密,晶粒尺寸减小了70.1%,组织均匀性好。显微硬度测试表明,经复合场处理后Cu-20Pb亚偏晶合金显微硬度得到提高,平均显微硬度提高了29.68%。摩擦磨损试验表明,复合场下制备的Cu-20Pb亚偏晶合金拥有更低的摩擦因数和磨损量,合金的耐磨性能得到提高。
        Cu-20 Pb hypomonotectic alloys were prepared under normal conditions and the electromagnetic microgravity+pulse current compound field,meanwhile,the microstructure,microhardness and anti-friction properties of hypomonotectic alloys were analyzed.The results reveal that Cu-20 Pb hypomonotectic alloys are mainly composed of matrixα-Cu andβ-Pb.The hypomonotectic alloy prepared under conventional condition presents large grain size with segergated structure,coarse dendritcs with less uniformity.By compound field,the segregation of hypomonotectic alloy can be inhibited,so dendrite is fined and densified with satisfied uniformity,and the grain size is decreased by 70.1%.Microhardness test reveals that the hardness of Cu-20 Pb hypomonotectic alloy under the compound field is increased by 29.68%.The frictional-wear test shows that the Cu-20 Pb hypomonotectic alloy alloys prepared under compound field has the lower friction coefficient and wear rate with desirable wear resistance.

引文

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