大变形异步累积叠轧纯铜再结晶退火后的超细孪晶  

Ultra-fine twins of large deformation asymmyetrical accumulative rolling bonding(AARB)pure copper after recrystalization annealing

作　　者：周蕾[1] 史庆南[1] 刘润[1] 王军丽[2] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明理工大学分析测试研究中心,云南昆明650093

出　　处：《金属热处理》2012年第12期29-32,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(50804018);稀贵及有色金属先进材料教育部重点实验室开放基金(ZDS2010015C);2010云南省科技条件平台建设计划(2010DH025)

摘　　要：对纯铜带材进行异步累积叠轧大塑性变形,并辅以再结晶退火处理,制备出了均匀的超细孪晶铜材。利用透射电镜对变形铜材再结晶退火中形成的超细孪晶进行了观察。结果表明,大变形异步累积叠轧铜材在190℃下退火,变形铜材内发生孪晶形核,退火达到30 min时,铜材内形成均匀的超细孪晶,大小为2～3μm;再结晶退火初期,电导率快速上升,随退火时间延长,电导率缓慢升高,最高达59 MS/m。Ultra-fine twins copper was prepared by asymmyetrical accumulative rolling bonding （AARB） and recrystalization annealing followed. The ultra-fine twins formed in deformed copper strips during recrystalization treatment was observed by TEM. The results show that twinning nucleation occurs in AARB copper when annealed at 190 ℃. Uniform uhra-fine twins forms when annaealed for 30 min, and the twin size is 2-3 μm. At the beginning of annealing, the electrical conductivity rises fast. With the extension of annealing time, the electrical conductivity rises slowly, and finally up to 59 MS/m.

关 键 词：纯铜 大变形 异步累积叠轧 再结晶退火 超细孪晶 

分 类 号：TG146.11[一般工业技术—材料科学与工程]