拉拔变形量和退火工艺对铜包纯铁线材组织与性能的影响  

Effects of drawing deformation and annealing process on microstructure and properties of copper clad pure iron wire

作　　者：朱映玉 袁大伟[1] 陈剑明[1] 陈辉明[2] Zhu Yingyu Yuan DaweiI Chen Jianming Chen Huiming(College of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China Institute of Engineering and Research, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China)

机构地区：[1]江西理工大学材料科学与工程学院,江西赣州341000 [2]江西理工大学工程研究院,江西赣州341000

出　　处：《金属热处理》2016年第12期131-136,共6页Heat Treatment of Metals

基　　金：基金项目:赣鄱英才555工程(3403003789);引线框架材料Cu-Ni-Si系合金的成分设计(20132BAB216015)

摘　　要：采用拉伸复合法制备了铜包纯铁线材,研究了拉拔变形量、退火温度和时间对铜包纯铁线材组织与性能的影响。结果表明:随着拉拔变形量的增加,铜包纯铁线材铜、铁晶粒越来越小,铜晶粒呈现不规则形状,铁晶粒呈现典型的流变形特征,线材抗拉强度逐渐升高,导电率、伸长率逐渐降低;随着退火温度的升高和退火时间的延长,铜和铁的晶粒逐渐长大;随退火温度的升高,铜-铁界面铜、铁原子发生扩散,形成一定厚度的扩散层,线材的抗拉强度降低、伸长率提高,导电率先升高后降低;随着退火时间延长,复合线材的导电率和伸长率逐渐升高,抗拉强度降低。Copper clad pure iron wire was prepared by the method of drawing compound method. Effects of drawing deformation, annealing temperature and time on microstructure and mechanical properties of the copper clad pure iron wire were analyzed. The test results show that with the increase of drawing deformation, the grain size of copper and iron are all decreased, and copper grains are irregular in shape, and iron grains present typical flow deformation characteristics, the tensile strength of the wire is increased, the conductivity and the elongation are decreased. With the increase of annealing temperature and time, the grain of copper and iron grow up gradually. With the increase of annealing temperature, the atoms of copper and iron at interface diffuse to each other, and form a certain thickness diffusion layer, the tensile strength is decreased and elongation is increased. The conductivity first increases and then decreases. With annealing time prolonging, the conductivity and elongation increase, and the tensile strength decreases.

关 键 词：铜包纯铁线材 拉拔变形 退火工艺 组织 导电率 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—热处理]