钇对高强高导Cu-Cr-Zr合金组织与性能的影响  

Effect of Yttrium on Microstructure and Properties of High Strength and High Conductivity Cu-Cr-Zr Alloy

作　　者：张成功 乔振兴 史志铭[1] 新巴雅尔[1] 峰山 刘慧敏[1] 敖敏 Zhang Chenggong;Qiao Zhenxing;Shi Zhiming;Xinbayaer;Feng Shan;Liu Huimin;Ao Min(School of Materials Science and Engineering,Inner Mongolia University of Technology,Inner Mon-golia Engineering Research Center for Multifunctional Copper Materials,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,多功能铜材料内蒙古自治区工程研究中心,内蒙古呼和浩特010051

出　　处：《中国稀土学报》2024年第2期294-303,I0004,共11页Journal of the Chinese Society of Rare Earths

基　　金：内蒙古自然科学基金项目(2021LHMS05002),内蒙古自治区直属高校基本科研业务费项目(JY20220039)资助。

摘　　要：采用非真空熔炼和近液相线铸造相结合的方法制备Cu-Cr-Zr-Y合金,并对其进行固溶、室温轧制与时效处理,研究Y对Cu-Cr-Zr合金组织与性能的影响。结果表明,Cu-0.6Cr-0.14Zr-0.15Y合金的铸态组织为均匀细小的等轴晶,平均晶粒尺寸约为11μm。Y的加入抑制时效过程中Cr元素的析出。Cu-0.6Cr-0.14Zr-0.15Y合金中出现纳米级Cr,Cu_(5)Zr,CuY析出相和纳米孪晶,平均尺寸分别为5~20nm和15nm。Cu-0.6Cr-0.14Zr-0.15Y合金经固溶-室温轧制-时效后,抗拉强度达到550MPa,相对电导率达到85%IACS,较相同后处理条件下的Cu-0.6Cr-0.14Zr合金抗拉强度提高了27.3%、相对电导率下降了3.4%。A series of Cu-Cr-Zr-Y alloys was prepared by a combination of non-vacuum melting and near-liquidphase casting methods,which was subjected to solid solution,room-temperature rolling and aging treatment to investigate the effects of rare-earth Y on the structure and characteristics of Cu-Cr-Zr alloys.The results show that the as-cast structure of Cu-0.6Cr-0.14Zr-0.15Y alloy is a uniform fine isometric crystal with an average grain size of about 1lμm.The addition of rare-earth element Y inhibits the precipitation of Cr elements during aging,and the nano-scale Cr,Cu_(5)Zr and CuY precipitation phases and nano-twins appear in Cu-0.6Cr-0.14Zr-0.15Y alloy with an average size of 5-20 nm and 15 nm,respectively.The Cu-0.6Cr-0.14Zr-0.15Y alloy achieves a tensile strength of 550 MPa and a relative electrical conductivity of 85%IACS after solid solution-room temperature rolling-aging,which increases the tensile strength by 27.3%and decreases the relative conductivity by 3.4%compared with the Cu-0.6Cr-0.14Zr alloy under the same post-treatment conditions.

关 键 词：稀土Y CU-CR-ZR合金 微观组织 抗拉强度 相对电导率 

分 类 号：TG146.4[一般工业技术—材料科学与工程]