运用Thermo-Calc软件进行热力学计算,预测了一种新型9-12%Cr低活性F/M(铁素体/马氏体)实验钢的组织.对淬火回火热处理后的显微组织进行了观察,并对析出物进行电子衍射结构分析和EDS化学成分检测.结果表明,实验钢是典型的回火板条马氏体组织,位于各种晶界上的析出物均为富Cr的碳化物M23C6,其化学成分随碳化物的形貌变化而变化.对实验钢进行60%冷变形并随后在820℃退火10-300min,M23C6在完全再结晶、奥氏体相变过程中进一步球化,Cr、W不断富集,Cr/Fe逐渐升高至2后成分趋于稳定,化学组成接近于(Cr15Fe6W2)C6.
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