In-situ detection of weld metal thermal cycle of 10CrMo910 steel

10CrMo910 steel was welded by using proper parameters for solving the problem of cold crack and local hardening in the weld or adjacent metal weld of 10CrMo910 steel.Thermo-couples were laid in welded seam during welding to record temperatures in situ, and in-situ detection of thermal cycle about weld metal was realized.The detected maximum temperature during thermal process was 1701℃ and above 401℃ than the reported results about heat-affected zone.The welding thermal cycle curves with oil-cooled, air-cooled and sand-cooled for different cooling rates of welded joint were obtained.