高温熱処理を施した窒素添加オーステナイト系ステンレス鋼中析出物のナノ構造解析

越智 実; 佐藤 弘成; 寺西 亮; 佐藤 幸生; 濱田 純一; 多久島 睦子; 原 徹; 金子 賢治

doi:10.2355/tetsutohagane.TETSU-2018-067

分析・解析

高温熱処理を施した窒素添加オーステナイト系ステンレス鋼中析出物のナノ構造解析

越智実, 佐藤弘成, 寺西亮, 佐藤幸生, 濱田純一, 多久島睦子, 原徹, 金子賢治

著者情報

キーワード: nitrogen-added austenitic stainless steel, intragranular precipitates, intergranular precipitates, FIB-SEM serial-sectioning, TEM-SAED pattern, STEM-EDS

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2019 年 105 巻 4 号 p. 418-425

DOI https://doi.org/10.2355/tetsutohagane.TETSU-2018-067

詳細

抄録

More than one thousand intragranular and intergranular precipitates of nitrogen-added austenitic stainless steel, SUSXM15J1, were characterized by FIB-SEM serial-sectioning tomography, by conventional transmission electron microscopy (TEM) and by scanning transmission electron microscopy (STEM). All of intragranular precipitates were found nitrided to form dichromium nitride, Cr₂N, Two types of intergranular precipitates were found Cr₂N and Cr₃Ni₂Si(N), and some of them were grown and jointed due to the additional heat treatment during the tensile test at 1173 K. which probably contributed to its high-temperature strength.

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