金属粉末射出成形で作製したオーステナイト系ステンレス鋼の引張特性に及ぼす窒素添加と変形双晶の影響

概要

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High nitrogen stainless steel (Fe-17Cr-12Mn-3Mo-1N) fabricated by metal injection molding (MIM) method has prominent strength and ductility. However, the tensile properties are unexplainable only by the influence of nitrogen solid solution strengthening. In this study, to clarify it, we have examined tensile-deformed microstructure. Strength of high nitrogen stainless steel was three times as high as that of SUS316L, without losing ductility, and micro-deformation twinnings were observed for the steels tensile-fractured at room temperature. It is thought that high strength with high ductility of this steel is attributed to solid solution strengthening of nitrogen and the formation of deformation twinning.
社団法人粉体粉末冶金協会の論文
2009-03-15