Weld Decay Recovery by Laser Beam Surfacing of Austenitic Stainless Steel Welded Joints

概要

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This study is an attempt to improve corrosion resistance by laser beam surface treatment. AISI 304 type stainless steel welds were surface treated by laser and the effectivenesses of various treatment conditions were evaluated by acidic corrosion tests and metallurgical observation. It was found that laser treatment changed the morphology of carbide precipitates in the heat affected zone of AISI 304 austenitic steel MIG welded joints, and that it is possible to effect revovery from weld decay by laser surface treatment. Partial melting of the surface by laser scanning seems to be the optimum condition for weld decay recovery. The depth of solution treatment is 0.25 mm in this case.
社団法人溶接学会の論文
1990-04-01