高Cr马氏体耐热钢的协同强化机制及形变热处理应用

张竟文, 余黎明, 刘晨曦, 丁然, 刘永长

Synergistic Strengthening of High-Cr Martensitic Heat-Resistant Steel and Application of Thermo-Mechanical Treatments

ZHANG Jingwen, YU Liming, LIU Chenxi, DING Ran, LIU Yongchang

图10 高Cr马氏体耐热钢焊接热循环中细晶热影响区(FGHAZ)中形成的均匀细晶结构[94]和裂纹[53]、临界热影响区(ICHAZ)中具有硬度差异的晶粒异质及由此引发的蠕变界面裂纹[111]

Fig.10 Fine-grain structure[94] (a) and creep cracks[53] (b, c) in fine-grain heat affected zone (FGHAZ), heterogeneous grains (marked by letters A-G) with different hardnesses and creep cracks[111] (d-f) in inter-critical heat affected zone (ICHAZ) of high-Cr martensitic heat-resistant steels (Inset in Fig.10c shows the corresponding EDS map of element Cr)