The constitution of the welded joint in the GX4CrNi13-4 stainless steel

摘要

The constitution of the base material (GX4CrNi13-4) and the filler material (CN 13-4IG) was investigated in initial and heat-treated state using modern investigative techniques. The base material and the weld have the same constitution with martensite alpha_M as matrix, and alpha_(Fe)- and alpha_(Fe)-ferrite along with precipitates of (Cr, Fe)_(23)C_6 carbide. The hardness of the weld is lowered and more equal through the weldment after the stage III heat treatment. The weldment is free of typical welding defects such as porosity, macro-and microcracks, inclusions etc.