Nb/Ti比对铸造镍基高温合金长期时效组织演化的影响*

孙文, 秦学智, 郭永安, 郭建亭, 楼琅洪, 周兰章

EFFECTS OF Nb/Ti RATIOS ON THE MICROSTRUCTURAL EVOLUTIONS OF CAST Ni-BASED SUPERALLOYS DURING LONG-TERM THERMAL EXPOSURE

SUN Wen, QIN Xuezhi, GUO Yongan, GUO Jianting, LOU Langhong, ZHOU Lanzhang

表1 实验合金成分

Table 1 Compositions of experimental alloys

Fraction Sample C Cr Al Ti Nb W Mo Fe Ni Nb+Ti Nb/Ti Al+Ti+Nb W+Mo Mo/ (W+Mo) % Mass A0 0.09 15.83 1.66 2.48 1.14 4.89 3.52 14.80 Bal. 3.62 0.46 - 8.41 0.42 A2 0.09 15.23 1.80 3.03 0.62 4.95 3.61 14.90 Bal. 3.65 0.20 - 8.56 0.42 A4 0.10 15.39 1.82 3.49 0.10 4.94 3.58 14.80 Bal. 3.59 0.03 - 8.52 0.42 Atomic A0 0.44 17.83 3.60 3.03 0.72 1.56 2.15 15.48 Bal. - - 7.35 - - A2 0.43 17.10 3.89 3.67 0.39 1.57 2.20 15.53 Bal. - - 7.95 - - A4 0.48 17.22 3.92 4.23 0.06 1.56 2.17 15.37 Bal. - - 8.21 - -