軟X線吸収分光法によるフェライト鋼中微量固溶炭素の化学状態観察

• Published in: 鉄と鋼 Vol. 104; no. 11; pp. 628 - 633
• Main Authors: 二宮, 翔, 神谷, 和孝, 為則, 雄祐, 鶴田, 一樹, 岡島, 敏浩, 吉村, 大介, 澤田, 英明, 木下, 惠介, 西堀, 麻衣子
• Format: Journal Article
• Language: Japanese
• Published: 一般社団法人 日本鉄鋼協会 2018
• Subjects: aging; chemical state analysis; low-carbon steel; photoelectron spectroscopy; X-ray absorption spectroscopy
• ISSN: 0021-1575; 1883-2954
• DOI: 10.2355/tetsutohagane.TETSU-2018-050

Observation of chemical state of solid-solution carbon in a low-carbon steel was tried by C-K near-edge x-ray absorption fine structure spectra measurement. In addition, the wavelength dependence of the photoelectron spectrum on the surface of the bulk steel was evaluated, and the contamination and oxidation layer of 3 nm in thickness on the surface of the steel was found. As a result, it was possible to observe the chemical state change of carbon existing in the bulk iron located deeper than the oxidation and contamination layer, by evaluating the difference spectra between the sample and the reference. Furthermore, by evaluating the shape change of the difference spectra depending on the heat treatment time, this study suggested that the chemical state of carbon in bulk iron changes with heat treatment.