通过金相显微镜、扫描电子显微镜和透射电子显微镜的观察,对不同回火温度下40CrNi2Mo钢在弹丸侵彻下产生的绝热剪切带的微观特征进行研究.结果表明:此试验条件下的绝热剪切带宽为10～40μm,可分为过渡区和中心区;过渡区为严重形变后拉长的马氏体板条,而中心区发生了相变.形成了细小的等轴晶结构.
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