异步叠轧制备超细晶铜微观组织与力学性能  

Microstructure and Mechanical Properties of Ultra-fine Grained Copper Prepared by Asymmetrical Accumulative Roll-bonding(AARB)Process

作　　者：崔浩[1] 史庆南[1] 张坤华[1] 王军丽[1] 

机构地区：[1]昆明理工大学云南省新材料制备与加工重点实验室

出　　处：《新技术新工艺》2006年第8期18-20,共3页New Technology & New Process

基　　金：云南省自然科学基金重点项目(2003E0003Z)

摘　　要：采用大变形异步叠轧方法制备超细晶铜,对其微观组织和力学性能进行分析。实验结果表明,利用异步叠轧法制备超细晶材料可以达到细化晶粒的目的。大变形异步叠轧后铜的平均晶粒尺寸由50μm细化到100nm;抗拉强度达420.8MPa,为无氧纯铜抗拉强度的1.82倍;屈强比为0.76;延伸率由原始的44%下降到7.2%,且显微硬度显著增加。Ultra-fine grained copper is prepared by asymmetrical accumulative roll-bonding(AARB)process with its microstructure and mechanical properties investigated.Experimental results show that it is feasible to fabricate ultra-fine-grained materials using AARB.The average size of crystalline grain is fining from 50 μm to 100 nm after AARB;ultimate strength of the ultra-fine grained copper is increased to 420.8 MPa which is 1.82 times of pure copper;the coefficient of elongation drops from 44% to 7.2% and original and micro-hardness increase obviously.

关 键 词：异步叠轧 显微硬度 微观组织 超细晶铜 力学性能 

分 类 号：TG113.11[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]