测量了碳含量(质量分数,%)分别为0.24,0.28,0.30,0.39和0.44的Cr-Ni-Mo装甲钢板基体、变形区及绝热剪切带的显微硬度,观察绝热剪切带形貌和微观组织结构.结果表明:随硬度升高,绝热剪切带的数量增多.绝热剪切带的硬度远高于基体及淬火态试样的硬度,其硬度随碳含量变化的规律与淬火态试样随碳含量变化的规律一致.绝热剪切带微观组织是由非常细小的马氏体板条构成的,未观察到绝热剪切带内部析出碳化物相.可以认为,高硬度装甲钢板中绝热剪切带的硬化可分为碳和合金元素的固溶强化、变形亚结构的相变遗传和组织细化三个部分.
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