Ni、Si元素的添加对Cu-7Sn合金组织及力学性能的影响  

Effect of Ni and Si additions on the microstructure and mechanical properties of Cu-7Sn alloy

作　　者：樊文欣[1] 高阳[1] 王鹏飞 陈燕 原霞[1] 彭丽军 付亚波[4] 张忠涛[5] FAN Wenxin;GAO Yang;WANG Pengfei;CHEN Yan;YUAN Xia;PENG Lijun;FU Yabo;ZHANG Zhongtao(School of Mechanical Engineering,North University of China,Taiyuan 030051,China;Military Representative Office of the Military Representative Bureau of the Army Equipment Department in Beijing,Taiyuan 030000,China;Research Institute of Engineering Technology Co.,Ltd.,Beijing 101400,China;Taizhou College,Taizhou 318000,Zhejiang,China;Golden Dragon Precise Copper Tube Group Inc,Chongqing 404100,China)

机构地区：[1]中北大学机械工程学院,太原030051 [2]陆军装备部驻北京地区军事代表局某军事代表室,太原030000 [3]有研工程技术研究院有限公司,北京101400 [4]台州学院,浙江台州318000 [5]金龙精密铜管集团股份有限公司,重庆404100

出　　处：《有色金属科学与工程》2025年第1期85-95,共11页Nonferrous Metals Science and Engineering

基　　金：山西省基础研究计划项目(20210302124428);山西省研究生教育创新项目(2022Y606)。

摘　　要：在传统的固溶强化型Cu-7Sn合金的基础上,通过相图热力学和第一性原理结果对合金化成分及热处理制度进行设计,探究了不同温度条件下合金的物相组成,并对材料的微观组织演变进行表征。通过分析不同合金成分及温度条件下的物相组成,设计并制备出一种新型沉淀强化型Cu-7Sn-1Ni-0.4Si合金。研究表明,根据相图及第一性原理计算结果,将Ni和Si元素作为合金化元素,采用熔铸法制备的Cu-7Sn-1Ni-0.4Si合金,在850℃条件下进行3 h的固溶处理及400℃条件下进行5 h的时效处理后,大量δ-Ni2Si相析出,显著提升了合金的力学性能。此时,合金的维氏硬度、抗拉强度和延伸率分别可达160.7 HV、550 MPa和18%。On the basis of the traditional solid solution strengthened Cu-7Sn alloy,the alloy phase diagram and thermodynamic calculation,combined with the first nature principle results for the design of the alloy composition and heat treatment regime,the physical phase composition of the alloy under different temperature conditions was investigated and experimentally characterized.By analyzing the phase compositions of the alloys with different compositions and temperatures,a new precipitation-strengthened Cu-7Sn-1Ni-0.4Si alloy was designed and prepared.The results show that the Cu-7Sn-1Ni-0.4Si alloy prepared by the melt casting method with Ni and Si elements as alloying elements according to the phase diagrams and first principle calculations can successfully introduce the δ-Ni2Si precipitation phase into the alloy after the solution treatment at 850℃ for 3 h and the aging treatment at 400℃ for 5 h,which can significantly enhance the mechanical properties of the alloy.The Vickers hardness,tensile strength and elongation of the alloy can reach 160.7 HV,550 MPa and 18%,respectively.

关 键 词：Cu-7Sn合金 热处理 析出相 力学性能 

分 类 号：TG113.12[金属学及工艺—物理冶金]