电场作用下1.6%C-UHCS/40Cr钢的超塑性焊接  

Superplastic welding of 1.6%C-UHCS/40Cr steel in an electric field

作　　者：张柯柯[1] 孙敬[1,2] 吴志伟[1] 马宁[1,3] 邱然锋[1] 张占领[1] 

机构地区：[1]河南科技大学材料科学与工程学院,洛阳471003 [2]中航锂电(洛阳)有限公司,洛阳471009 [3]天津大学材料科学与工程学院,天津300072

出　　处：《焊接学报》2011年第11期5-8,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50774029);河南省杰出青年科学基金资助项目(074100510011)

摘　　要：基于对40Cr钢淬火后与经热机械处理超高碳钢1.6% C-UHCS电场作用下超塑性焊接可行性的分析,在非真空、无保护气氛下,进行了电场作用下1.6% C-UHCS/40Cr的超塑性焊接工艺试验.结果表明,当施加试样接正极、环状电极接负极的电场时,可明显提高40Cr钢淬火后与经热机械处理超高碳钢1.6% C-UHCS的超塑性焊接效果.与不加电场相比,当两者在外加电场+3 kV/cm、预压应力56.6 MPa、焊接温度780℃、初始应变速率1.5×10-4/s的条件下,经20 min超塑性焊接,接头强度提高26.8%.The superplastic welding in an electric field between theromomechanical processed 1.6% C-UHCS and quenched 40Cr steel in atmosphere was conducted based on the analysis of their electro-superplastic weldablity.The results reveal that the performance of 1.6%C-UHCS/40Cr joint can apparently be improved when the sample connects positive,ring connects negative.Thereinto,the superplastic welding of both steels was carried out under the conditions of an electric field intensity of +3 kV/cm,a pre-pressed stress of 56.6 MPa,a welding temperature of 780 ℃,an initial strain rate of 1.5×10-4/s and welding time of 20 minutes,and the strength of joint increases by 26.8% compared with that obtained without electric field.

关 键 词：电场 超高碳钢 超塑性 固态焊接 

分 类 号：TG453.9[金属学及工艺—焊接]