Isothermal Superplastic Solid State Welding of 40Cr and QCr0.5, ZQSn6-6-3
Based on the feasibility of isothermal superplastic solid state welding of 40Cr steel and QCr0.5, ZQSn6-6-3 copper alloy, the welded surface of 40Cr steel surface is ultra-fined through laser quenching, and then the welding process tests between different base metals of 40Cr and QCr0.5, ZQSn6-6-3 are made under the condition of non vacuum and non shield gas. The experimental results show that, with the sample surface of 40Cr steel after laser quenching and QCr0.5,ZQSn6-6-3 copper alloy carefully cleaned, under the pre-pressed stress of 56.6-84.9MPa, at the welding temperature of 750-8000C and at initial strain rate of (2.5-7.5)×10-4s-1, the superplastic solid state welding can be finished in 2-4 minutes so that the strength of the joints are up to that of QCr0.5 base metal or close to that of ZQSn6-6-3 base metal and the expansion rate of the joints dont exceed 6％. The plastic deformation of the joint is further analysed. The superplastic deformation of the copper alloy occurs in welding process and the deformation of 40Cr steel is little.
40Cr steel copper alloy laser quenching isothermal superplastic solid state welding
K.K.Zhang Y.L.Wang H.X.Shi H.Yu S.Liu
Material Science and Engineering College, Henan University of Science and Technology, Luoyang 471003,China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）