Cu-14Fe-C合金拉拔后的组织和性能  

Microstructure and properties of drawn Cu-14Fe-C alloy

作　　者：郭炜[1,2] 陆德平 姜江[1,2] 陈威 刘克明[3] Guo Wei;Lu Deping;Jiang Jiang;Chen Wei;Liu Kerning(Institute of Applied Physics,Jiangxi Academy of Sciences,Nanchang Jiangxi 330096,China;Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials,Nanchang Jiangxi 330096,China;Jiangxi Key Laboratory for Precision Drive and Control,Nanchang Institute of Technology,Nanchang Jiangxi 330099,China)

机构地区：[1]江西省科学院应用物理研究所,江西南昌330096 [2]江西省铜钨新材料重点实验室,江西南昌330096 [3]南昌工程学院江西省精密驱动与控制重点实验室,江西南昌330099

出　　处：《金属热处理》2019年第10期15-19,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51561010,51861025);江西省重点研发计划(20171BBH80009);江西省自然科学基金重大项目(20144ACB20013);江西省自然科学基金(20192BAB206001);江西省科学院重点科研项目(2017-YZD2-20);江西省科学院普惠制项目(2015-XTPH1-11);江西省科学院科研开发专项基金博士项目(2015-YYB-11)

摘　　要：采用光学显微镜、扫描电镜、维氏硬度计等研究了真空熔炼制备Cu-14Fe-C合金不同应变量拉拔和不同温度退火处理后的组织、力学性能和导电性能,结果表明,铸态Cu-14Fe-C合金中碳元素主要存在于富铁相内部;拉拔使Cu-14Fe合金中富铁相由铸态时的树枝状随机分布趋向于沿拉拔方向分布,拉拔变形量越大,纤维状富铁相尺寸越细,分布也越均匀;拉拔使Cu-14Fe-0.2C合金中大部分近似球状富铁相逐渐转变为近似椭球状,拉拔变形量越大,近似球状相被拉长得越明显;拉拔变形显著提高Cu-14Fe-C合金的硬度而降低其电阻率;Cu-14Fe-C合金拉拔后退火,电阻率随退火温度提高不断下降。Cu-14Fe-C alloys were prepared by means of vacuum melting,then drawn with different strain and annealed at different temperatures.Microstructure,mechanical properties and conductivity of the alloys were studied by using optical microscope,scanning electron microscope and Vickers hardness tester.The results show that the carbon element mainly exists in the iron-rich phases of as-cast Cu-14Fe-C alloys.Drawing makes the distribution of iron-rich phases in Cu-14Fe alloy tend to be deformed along the drawing direction from the dendritic random distribution in as-cast state.The larger the drawing deformation,the finer the size of the fibrous iron-rich phases and the more uniform the distribution.Most of the approximate spherical iron-rich phases in Cu-14Fe-0.2C alloy gradually transform into approximate ellipsoidal ones after drawing,and the larger the drawing deformation,the more obvious the elongation of the approximate spherical phases are.Drawing deformation significantly increases the hardness of Cu-14Fe-C alloys and decreases the resistivity.The resistivity of drawn Cu-14Fe-C alloy decreases with the increase of annealing temperature.

关 键 词：Cu-14Fe-C合金 拉拔 显微组织 力学性能 导电性能 

分 类 号：TG166[金属学及工艺—热处理] TG359[金属学及工艺—金属学]