摘要
采用光学显微镜、万能试验机、电阻仪等设备,研究了变形量对抗拉强度相近的硬铜轧制杆和拉拔杆组织、力学性能及电学性能的影响。结果表明,随着拉拔变形量增加,硬铜轧制杆的抗拉强度呈稍降低而后增加的趋势,电导率持续降低;拉拔杆的抗拉强度持续增加,电导率先变化不大而后略有降低。当拉拔变形量≥70%时,硬铜拉拔杆拉制单线的抗拉强度及导电性能优于轧制杆。采用硬铜拉拔杆拉制硬铜单线的导电性能及力学性能较稳定且满足TB/T3111-2017标准要求。
The effects of drawing deformation on the microstructure,mechanical properties and electrical properties of hard copper rolling rod and drawing rod were investigated by means of optical microscope,universal testing machine and resistor.The results show that with the increase of drawing deformation,the tensile strength of hard copper rolling rod is decreased slightly firstly and then increased,while the electric conductivity is decreased.The tensile strength of the drawing rod is increased,and electric conductivity keeps stable at first and then decreased slightly.When the drawing deformation is more than or equal to 70%,the tensile strength and conductivity of the single wire drawn by the hard copper drawing rod are superior to that of the rolling rod.The electrical and mechanical properties of hard copper single wire drawn by drawing rod are relatively stable and meet the requirements of TB/T3111-2017 standard.
作者
于婷
李学斌
李鸿娟
丁志敏
Yu Ting;Li Xuebin;Li Hongjuan;Ding Zhimin(Kangyuan New Material Co.,Ltd.,China Railway Construction and Electrification Bureau Group;Hunan University of Humanities,Science and Technology;School of Materials Sicence and Engineering,Dalian Jiaotong University)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第3期345-348,共4页
Special Casting & Nonferrous Alloys
关键词
硬铜拉拔杆和轧制杆
变形量
晶粒取向
抗拉强度
电导率
Hard Copper Drawing Rod and Rolling Rod
Deformation
Grain Orientation
Tensile Strength
Conductivity
