摘要
通过对40Cr/T10A钢试样及试样待焊面表层分别实施盐浴加热循环淬火、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)工艺及接头质量的影响。试验结果表明,钢待焊表面组织对ISSW接头的形成有重要影响。待焊面组织越细,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,也可实现接头抗拉强度达到40Cr母材的强度,但ISSW所需压接时间稍长。ISSW属小变形焊接,接头变形主要集中在原界面附近的淬火区,且T10A侧的变形均大于40Cr侧。
The microstructures of 40Cr and T10A steel and its surfaces were ultra-fined through salt-bath cyclic quenching,high frequency hardening and laser hardening,then influence of the welded surface microstructure of steels on the process and joint quality of isothermal superplastic solid-state welding(ISSW) for 40Cr/T10A dissimilar steels was studied.The experimental results showed that the welded surface microstructure of steel plays an important role in the formation of ISSW joint.The welding temperature of ISSW extends to low temperature ranges and the initial strain rate extends to higher strain rate ranges while having finer welded surface microstructure of steel before welding.If only one surface is eligible for ultra-fining,the tensile strength of the joint will be also up to that of 40Cr base metal,but the welding time is slightly longer.ISSW belongs to the little deformation welding,the deformation of joint is mainly located in the quenched area near original interface.The deformation of T10A side is larger than that of 40Cr side.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2006年第1期37-40,共4页
Transactions of The China Welding Institution
基金
河南省自然科学基金资助项目(0511050800)
河南省教育厅自然科学基金资助项目(2004430211)
河南省高校创新人才基金资助项目(教高2004-294)
河南省高校杰出科研人才创新工程项目(2004KYCX020)
关键词
钢
组织超细化
超塑焊接
工艺
接头质量
steel
microstructure ultra-fining treatment
superplastic solid-state welding
process
