测定了5种Fe-Mn-C合金的M_s温度及奥氏体在M_s温度时的屈服强度,结果表明两者成线性关系。还研究了奥氏体固溶强化对马氏体形态的影响,提出存在一个奥氏体强化特征温度T_c,当M_s>T_c时,马氏体形态主要为位错型条状马氏体,当M_s The M_5 temperature and the yield strength of austenite at M_5 tem-perature have been measured for five Fe-Mn-C alloys. The experimental results showthat there is a linear relationship between them. The effect of the solution strength-ening of austenite on martensite morphology is also studied. It is pointed outthat there is a characteristic temperature of strengthening in austenite, T_c. Marten-site morphology is mainly dislocated laths when M_5>T_c, and is mainly twinnedplates when M_5
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