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Effect of solute carbon on the characteristic hardening of steel at high temperature

高温における鋼の特性硬化に及ぼす溶質炭素の影響

古賀 紀光*; 梅澤 修*; 山本 正之*; 山本 卓*; 山下 享介; 諸岡 聡  ; 川崎 卓郎   ; Harjo, S.   

Koga, Norimitsu*; Umezawa, Osamu*; Yamamoto, Masayuki*; Yamamoto, Takashi*; Yamashita, Takayuki; Morooka, Satoshi; Kawasaki, Takuro; Harjo, S.

Small ball rebound hardness tests demonstrated characteristic hardening at 700 K in the ultra-low carbon and pearlitic steels. The equilibrium phase diagram of Fe-C binary alloy calculated using Thermo-Calc exhibited dissolving of cementite above 700 K. Moreover, in-situ heating neutron diffraction measurement demonstrated the increase of lattice parameter by dissolving of cementite above 700 K. Therefore, it can be concluded that the characteristic hardening above 700 K can be attributed to the solid solute carbon.

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パーセンタイル:26.82

分野:Materials Science, Multidisciplinary

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