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本文通过试验表明,0.8～2.11%C 的 Fe-C 合金,在稍低于 Ms 点的温度下缓冷,可得到冷却蝶状马氏体;并可分成有中脊的与无中脊的蝶状马氏体;随着奥氏体化温度的提高,冷却蝶状马氏体的数量增多。试验结果还发现,在1.60～2.11%C 的 Fe-C 合金中可以形成应力促发蝶状马氏体;其类型可分为磨削应力促发的表面蝶状马氏体和相变应力促发的蝶状马氏体。只有在(100)_A(两叶片的结合面)与金相磨面接近垂直的奥氏体晶粒或孪晶带中,才易于形成表面蝶状马氏体。蝶状马氏体的立体形态类似于钝角角钢的形状,两叶片的结合部位类似于孪晶界,不是两个马氏体片相遇的接触部位。
The experiment shows that the Fe-C alloy 0.8 ~ 2.11% C can be cooled butterfly-shaped martensite at a temperature slightly lower than the Ms point, and can be divided into a ridge with and without a ridge Like martensite; as the austenitizing temperature increases, the amount of cooling butterfly martensite increases. The experimental results also found that in the 1.60 ~ 2.11% C Fe-C alloy stress-induced butterfly martensite can be formed; its type can be divided into grinding stress-induced surface butterfly-shaped martensite and phase transformation stress Butterfly formed by the martensite. Only in the (100) _A (two blades of the bonding surface) and the metallographic surface nearly perpendicular to the austenite grains or twinning zone, the formation of surface butterfly-shaped martensite easily. The three-dimensional shape of the butterfly martensite is similar to the shape of an obtuse angle. The junction of the two leaves is similar to the twin boundary, not the contact area where two martensite sheets meet each other.