连续挤压与拉拔对Cu-2Ag-0.04La合金组织及性能的影响  

Effect of Continuous Extrusion and Drawing on Microstructure and Properties of Cu-2Ag-0.04 LaAlloy

作　　者：郭伟 余琪 陈岩 胡延波 宋鸿武[4] 王松伟 杨国富 GUO Wei;YU Qi;CHEN Yan;HU Yanbo;SONG Hongwu;WANG Songwei;YANG Guofu(JCC Processing Business Division,Nanchang 330096,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Jiangxi Copper Technology Research Institute Co.,Ltd.,Nanchang 330096,China;Changxu Advanced Materials Innovation Center,Institute of Metals,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]江西铜业加工事业部,南昌330096 [2]中南大学机电工程学院,长沙410083 [3]江西铜业技术研究院有限公司,南昌330096 [4]中国科学院金属研究所,师昌绪先进材料创新中心,沈阳110016

出　　处：《机械工程材料》2023年第7期7-13,共7页Materials For Mechanical Engineering

基　　金：中国博士后科学基金资助项目(2019M662276);中国科学院科技服务网络计划区域重点资助项目(KFJ-STS-QYZD-145);江西省重大科技研发专项项目(20203ABC28W004)。

摘　　要：采用下引连铸定向凝固技术制备直径为14 mm的Cu-2Ag-0.04La合金棒,再经过连续挤压获得直径为7 mm的合金丝,最后经过6道次拉拔获得直径为2 mm的合金线,研究了连续挤压及拉拔对合金组织和性能的影响。结果表明:铸态合金在连续挤压时,{001}〈100〉织构减弱并形成少量的{111}〈112〉和{110}〈112〉织构,经过拉拔后,{001}〈100〉织构基本消失,{111}〈112〉和{110}〈112〉织构增强。连续挤压态合金的抗拉强度、断后伸长率、硬度、导电率分别为270.0 MPa, 31.2%,84.3 HV,93.2%IACS,拉拔后分别为566.1 MPa, 4.6%,151.6 HV,88.9%IACS。Cu-2Ag-0.04Laalloy rod with a diameter of 14mm was prepared by downward continuous casting directional solidification technology,and then was continuously extruded to obtain alloy wire with a diameter of 7mm,and finally was drawed for 6passes to obtain alloy wire with a diameter of 2 mm.The effects of continuous extrusion and drawing on the microstructure and properties of the alloy were studied.The results show that during continuous extrusion of the as-cast alloy,{001}〈100〉texture was weakened,and a small amount of{111}〈112〉and{110}〈112〉textures were formed.After drawing,{001}〈100〉texture disappeared,and the strength of{111}〈112〉and{110}〈112〉textures increased.The tensile strength,percentage elongation after fracture,hardness and conductivity of the continuously extruded alloywere270.0MPa,31.2%,84.3HV,93.2%IACS,respectively,and after drawingwere566.1MPa,4.6%,151.6HV,88.9%IACS,respectively.

关 键 词：Cu-Ag-La合金 连续挤压 拉拔 织构 性能 

分 类 号：TG146[一般工业技术—材料科学与工程]