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Journal of KWJS 2007;25(4):65-71.
Published online September 21, 2007.
Welding Characteristics of Aluminized Steel Sheet by Nd:YAG Laser(Ⅰ) - Effects of Al Coating Weight on Weld Strength -
Jong-Do Kim, Jung-Han Lee, Ki-Chol Kim
Abstract
  Laser weldability of the aluminized steel for the full penetration welding will be described in this paper. We focused on the effect of Al coating conditions on weld strength. For these objectives, aluminized steel sheets that have various thickness and coating weight were prepared for laser welding. And then, tensile-shear and hardness test were carried out. At the same time, Al contents in weld after laser welding were analyzed and their correlations with mechanical properties were investigated. Besides, as removing partially coating layer, weldability has been investigated according to the position of coating layer. As a result of this study, tensile-shear strength was decreased with increasing Al contents in weld, and Al of coating layer caused grain growth.
Key Words: Aluminized steel sheet, Laser welding, Al coating weight, Tensile-shear strength, Hardness


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