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研究了淬火温度对马氏体合金钢性能和显微组织的影响.采用不同的淬火温度进行热处理,测量了硬度和室温冲击韧性,在光学显微镜、SEM和TEM下观察了显微组织,利用EBSD技术采集了晶粒取向分布并用Channel 5软件分析了晶界特征,实验结果表明:随着淬火温度的增加,硬度和室温冲击韧性都呈现先上升后下降的规律,在900℃淬火达到强韧性最佳组合,硬度达39 HRC,室温冲击吸收功66 J.在奥氏体晶粒不发生长大,析出物形态、分布无显著差异的情况下,钢的强韧性增加的主要原因为马氏体组织中特征晶界数量的增加.

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