G030051 SUS304の疲労挙動に及ぼす窒素中焼き鈍し処理の影響([G03005]材料力学部門一般セッション(5):ステンレス鋼の疲労)

概要

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The effect of annealing in nitrogen gas on fatigue behavior was studied using austenitic stainless steel, type304. Annealing in nitrogen gas was performed at 1100°C and 1200°C, and chromium nitrides precipitated under both temperatures. The amounts of nitrides were much larger at 1100°C than at 1200°C. Hardness and tensile tests revealed that the surface hardness and static strength were highly improved by the annealing. Especially, the hardness increase of the specimen annealed at 1200°C was due to not only the nitride precipitation but also the nitrogen absorption into the matrix. Rotary bending fatigue tests were performed in laboratory air, and the fatigue strengths of the annealed specimens increased significantly compared with that of untreated one, where annealing at 1100°C resulted in higher fatigue strength than at 1200°C.
一般社団法人日本機械学会の論文
2011-09-11