待焊表面组织对异种钢超塑性焊接的影响  

Effect of Welding Surface Microstructure on Superplastic Solid-State Welding for Different Steels

作　　者：张柯柯[1] 杨蕴林[1] 徐东[1] 赵宁[1] 王长生[1] 祝要民[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《材料热处理学报》2005年第5期113-116,共4页Transactions of Materials and Heat Treatment

基　　金：河南省高校创新人才基金(教高2004-294);河南省高校杰出科研人才创新工程项目(2004KYCX020);河南省自然科学基金(0511050800);河南省教育厅自然科学基金(2003430211)

摘　　要：对40Cr/T10A钢试样及试样待焊表面分别用盐浴加热循环淬火、高频淬火及激光淬火的组织超细化预处理,探讨了钢待焊表面组织对40Cr/T10A异材恒温超塑焊(ISSW)工艺、接头组织及性能的影响。试验结果表明,钢待焊表面组织越细,ISSW所需焊接温度向低温区移动、初始应变速率向高应变速率区域移动、ISSW所需时间越短;即使待焊双方一方实施组织超细化,也可实现接头拉伸强度达40Cr母材强度的ISSW,但所需压接时间稍长。ISSW接头中存在着明显的“界面超细晶区”、“过渡区”等组织特征区域。The microstructure of 40Cr and T10A steel and its surface to be welded is ultra-fined through salt-bath cyclic quenching, high frequency hardening and laser hardening, then the effect of the surface microstructure of steel on the welding technology, the microstructure and property of isothermal superplastic solid-state welding (ISSW) joint for 40Cr/T10A different steels is studied. The experimental results indicate that the welding temperature of ISSW extends to low temperature ranges and the initial strain rate extends to higher strain rate ranges for steel with finer surface microstructure before welding. If only one surface is eligible for ultra-fining, the tensile strength of the joint is also up to that of 40Cr base metal, but the welding time is slightly longer. The ultra-fined grain zone of interface and transition zone are obviously observed in ISSW joint.

关 键 词：组织超细化 超塑焊接 接头质量 

分 类 号：TG142[一般工业技术—材料科学与工程] TG406[金属学及工艺—金属材料]