稀土Ce对X20Co马氏体耐热钢蠕变性能的影响

向钰琳, 杨仁贤, 蔡欣, 胡小强, 李殿中

Effect of Ce Addition on Creep Properties of X20Co Martensitic Heat-resistant Steel

XIANG Yulin, YANG Renxian, CAI Xin, HU Xiaoqiang, LI Dianzhong

表3 12Ce钢蠕变前初始组织中析出相的成分

Table 3 Chemical composition of precipitates in 12Ce steel before creep (atomic fraction, %)

Phase V Cr Fe Co Mo W Mn Nb Matrix 0.9 11.7 65.5 11.6 3.7 5.9 0.7 - MC 73.4 2.4 2.2 3.9 2.6 2.1 - 13.4 M6C 1.3 11.4 39.4 6.1 15.9 25.7 - - M23C6 1.8 72.4 8.2 14.3 2.5 0.7 0.1 -