关键词：异种钢；焊接方法；热输入；微观结构
摘 要：Two kinds of welding methods,including SMAW and GTAW,were employed to connect 16MnR steel and 2205 steel.OM and TEM was used to observe the microstructure.EDX line scan was used to analyze elements in special areas of the joint.The results show that the degree of carbon migration in the side of 16MnRofthe seam welded by GTAW is larger than that by SMAW.Particle and chain-island are two maiin form of Fe3C in micro-area of carbon migration.The grain size of seam material in GTAW section is larger than that of SMAW and the content of austenitic of seam material in GTAW section is more than that of SMAW.The tongues in the side of 16MnR appear in both two seams welded by SMAW and GTAW and they are parts from base metal.