Welding Technique and Microstructure Analysis of Dissimilar Metal 15CrMoR and 0Cr18Ni9
Aimed at the poor weldability of 15CrMoR and 0Cr18Ni9 steel in arc welding,8mm thick Ni-based materials were pre-deposited on the groove surface by the side of the steel 15CrMoR to solve the difficult engineering problems,and detailed analysis on microstructure and mechanical properties of the welded joint was carried out.The results show that the mechanical properties of welded joint can reach standardized requirements through choosing appropriate deposited materials,weld materials and technological parameters.Obvious micrographic defects such as hardening organization,increasing carbon layer and decreasing carbon layer are not found.