40Cr与QCr0.5的恒温超塑性固态焊接  

Isothermal Superplastic Solid-State Welding of 40Cr and QCr0.5

作　　者：韩彩霞[1] 张柯柯[1] 杨蕴林[1] 朱志乾 罗美华[1] 王文焱[1] 

机构地区：[1]河南科技大学材料科学工程学院,河南洛阳471003 [2]河南火电二公司,河南温县454865

出　　处：《河南科技大学学报（自然科学版）》2003年第4期12-15,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：有色金属新材料国家重点实验室基金资助项目(2003);河南省教育厅自然科学基金资助项目(2003430211)

摘　　要：基于对40Cr表面激光淬火后与QCr0.5恒温超塑性固态焊接可行性的分析,在非真空、无保护气氛下,进行了40Cr QCr0.5的异材焊接工艺试验。试验结果表明,40Cr钢待焊接面经激光淬火预处理后与QCr0.5在预压应力56.6～84.9MPa、焊接温度750～800℃、初始应变速率(2.5～7.5)×10-4s-1的条件下,经120～180s短时压接,即可实现固态焊接,接头强度可达QCr0.5母材强度,胀大率不超过6%。焊接过程中QCr0.5发生了超塑性流变,40Cr变形甚微。Based on the analysis of probability for isothermal superplastic solid-state welding of 40Cr and QCr0.5, the welded surface of 40Cr can be made through laser surface quenching. The welding processing experiment between 40Cr and QCr0.5 has been carried out under non vacuum and non shield gas. The experimental results indicate that under the conditions of welding prepressure of 56.6～84.9MPa,temperature of 750～800℃,initial strain rate of (2.5～7.5)×10^(-4)s^(-1) , the solid-state welding can be finished in short time of 120～180s after the pretreatment of laser surface quenching of 40Cr. The strength of the joint is up to the base metal of QCr0.5, and the expanded rate don't exceed 6%. During the welding, superplastic flow can take place on QCr0.5, and the deformation of the 40Cr is very little.

关 键 词：恒温超塑性固态焊接 接头强度 胀大率 超塑性流变 铜 钢 

分 类 号：TG457.1[金属学及工艺—焊接]