微量Ce元素对高铬高钴型马氏体耐热钢力学性能的影响

王琨, 杨仁贤, 蔡欣, 郑雷刚, 胡小强, 李殿中

Effects of Trace Ce on Mechanical Properties of a Ferritic/Martensitic Heat Resistant Steel Containing High Cr and Co

WANG Kun, YANG Renxian, Cai Xin, ZHENG Leigang, HU Xiaoqiang, LI Dianzhong

表2 实验钢中的析出相和基体的SEM-EDS能谱分析结果

Table 2 Relative chemical compositions analyzed by SEM-EDS of the typical precipitates and matrix in X20Co and X20CoRE heat resistant steels (mass fraction, %)

Phase Fe Cr Co W Mo C Alloy matrix of X20Co 67.11 10.61 9.87 4.02 2.69 4.79 Alloy matrix of X20CoRE 67.20 10.40 9.86 5.50 3.08 3.96 Bulk precipitates in X20Co 30.01 8.22 4.30 35.41 14.26 7.11 Bulk precipitates in X20CoRE 32.72 8.19 4.91 33.15 12.71 7.83 Dispersed precipitates in X20Co 53.16 9.82 7.59 16.25 6.86 6.02 Dispersed precipitates in X20CoRE 52.04 10.47 7.41 15.00 6.73 6.66