419 SUS316Lステンレス鋼の溶接残留応力に及ぼす溶接後表面急冷の影響(材料工学)

概要

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To prevent the stress corrosion cracking in the heat-affected zone in welded metals, tensile residual stresses in the weld must be reduced. In this research, we developed a water-spray cooling method and applied it to the SUS316L welding region immediately after completion of welding. We analytically and experimentally showed that this method can reduce the tensile residual stresses. To estimate residual stresses, the heat transfer analysis and the thermal elasto-plastic analysis were performed. It was found that the preheating and the cooling conditions significantly affected on the residual stress distribution. The analytical results showed that the water-spray cooling changed the residual stress to compressive when the spray-water cooling procedure was combined with the preheating. And this result was confirmed by Experiments.
社団法人日本機械学会の論文
2001-03-09