고Mn강의 이종 레이저용접 특성

Characteristics of dissimilar laser welding of high Mn steel

High Mn steel has been developed for automotive applications since the steel has an excellent combination of strength and ductility. However, from the viewpoint of welding, high Mn steel has a few problems related to its chemical composition. In this study, development of dissimilar laser welding technology has been investigated for expanding application of high Mn steel. The results have shown that dissimilar weld joint between high Mn steel and carbon steel has poor erichsen property using STS309L filler wire or not.