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JWJ > Volume 28(3); 2010 > Article
Journal of KWJS 2010 June;28(3) :36-41.
Published online August 2, 2010.
Characteristics of Dissimilar CO₂ Laser Welding for High Mn Steel and Low Carbon Steel
BoYoung Jeong, TaeKyo Han

Correspondence:   Published online August 2, 2010
ABSTRACT
  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. This paper describes characteristics of dissimilar CO₂ laser welding for expanding application of high Mn steel. From this work it was cleared that dissimilar laser welded joint between high Mn steel and carbon steel had poor formability due to the formation of martensite within weld metal. In order to improve ductility of welded joint, the method of controlling the dilution ratio of high Mn steel was suggested.
Keywords: High Mn steel;CO₂ Laser welding;Dissimilar welding;Formability
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