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粉末冶金材料科学与工程  2019, Vol. 24 Issue (4): 385-390    
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
粉末冶金Cu-Cr-Zr合金的形变热处理组织及性能
赵凡, 刘祖铭, 吕学谦, 李全, 彭凯
中南大学 粉末冶金国家重点实验室,长沙 410083
Microstructure and properties of powder metallurgical Cu-Cr-Zr alloy by heat-treatment and deformation
ZHAO Fan, LIU Zuming, LÜ Xueqian, LI Quan, PENG Kai
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
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摘要 对放电等离子烧结(spark plasma sintering, SPS)制备的Cu-Cr-Zr合金进行固溶/冷轧和时效/冷轧的双级热处理/变形加工,研究合金的显微组织、力学性能和导电性能。结果表明,粉末冶金Cu-Cr-Zr合金经过980 ℃/50 min固溶和30%变形量的一次冷轧,以及450 ℃/2 h时效和70%变形量的二次冷轧后,得到成分均匀、晶粒细小的基体组织,以及均匀分布的以纳米相为主、亚微米相共存的多种尺度、多种结构第二相,实现了多尺度第二相沉淀强化和形变强化的协同作用,合金的抗拉强度和电导率同步提高,分别达到625 MPa和79%IACS,比SPS状态分别提高143%和20%。
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赵凡
刘祖铭
吕学谦
李全
彭凯
关键词 Cu-Cr-Zr合金高强高导粉末冶金热处理变形加工显微组织    
Abstract:Two-stage heat treatment/deformation processing with solution/cold-rolling and aging/cold-rolling of Cu-Cr-Zr alloy prepared by SPS was carried out, the microstructure, mechanical properties and electrical conductivity of the alloy were investigated. The results show that the SPSed Cu-Cr-Zr alloy matrix structure with uniform composition and fine grains, as well as the multi-scale of nano and sub-micron and multi-structure second phase with uniform distribution on the matrix were obtained by solution treated at 980 ℃ for 50 min, cold-rolled at 30% deformation, aged at 450 C for 2 h and cold-rolled at 70% deformation. The interactions of precipitation strengthening of the multi-scale second phase and strain hardening improved the strength and conductivity of the Cu-Cr-Zr alloy, and its tensile strength and electrical conductivity were 625 MPa and 79%IACS respectively, which were 143% and 20% higher than that of SPSed alloy.
Key wordsCu-Cr-Zr alloy    high strength and high conductivity    powder metallurgy    heat treatment    deformation processing    microstructure
     出版日期: 2019-07-12
ZTFLH:  TF122  
  TG146  
基金资助:国家863 计划资助项目(2009AA03Z526);国家重点研发计划资助项目(2016YFB0301300);中南大学中央高校基本科研业务费专项资金资助(2018zzts416)
通讯作者: 刘祖铭,教授,博士。电话:0731-88836355;E-mail: lzm@csu.edu.cn   
引用本文:   
赵凡, 刘祖铭, 吕学谦, 李全, 彭凯. 粉末冶金Cu-Cr-Zr合金的形变热处理组织及性能[J]. 粉末冶金材料科学与工程, 2019, 24(4): 385-390.
ZHAO Fan, LIU Zuming, LÜ Xueqian, LI Quan, PENG Kai. Microstructure and properties of powder metallurgical Cu-Cr-Zr alloy by heat-treatment and deformation. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 385-390.
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