Effect of pulse welding current on solidification cracking in austenitic stainless steel weld metal.

Abstract

Pulse arc welding has superior characteristics on arc stability and refining of micro-structure of weld metal. This experiment was carried out to clarify the influence of pulse welding current on solidification cracking tendency of austenitic stainless steel weld metal under low pulse frequency.Experimental results were as follows;Pulse welding current makes finer columnar structure and decreases segregation of sulfur and phosphor in weld metal. From these reasons, solidification crack in austenitic stainless steel weld metal is decreased using pulse welding current.