Application of Laser Beam Welding to Thin Steel Sheet

概要

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Since a laser beam can be focused almost to a point area, it is suitable for high speed welding of thin sheet metal. This study was conducted to clarify the advantages that could be expected from the application of laser beam welding to surface coated steel sheets and austenitic stainless steel. The results obtained are summarized as follows ; 1) Steel sheet can be welded with much smaller distortion by laser beam welding, compared to TIG welding. For coated sheet, the damage to the coated layer is less in laser welding than in TIG welding. It is possible to make full penetration welds by laser beam welding at speeds that are 3 to 5 times faster than by TIG welding. 2) TIG weld metal of Zn coated sheet shows a zinc-rich region at the surface but laser weld metal does not. 3) The tendency to weld decay in laser welded austenitic stainless steel is low, being almost the same level as in electron beam welds.
社団法人溶接学会の論文
1989-10-01