定向凝固DZ444镍基高温合金初生MC碳化物的分解行为

肖旋, 曾超, 侯介山, 秦学智, 郭建亭, 周兰章

THE DECOMPOSITION BEHAVIOR OF PRIMARY MC CARBIDE IN NICKEL BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ444

XIAO Xuan, ZENG Chao, HOU Jieshan, QIN Xuezhi, GUO Jianting, ZHOU Lanzhang

表1 标准热处理态MC化学成分的EDS分析结果

Table 1 EDS results of chemical compositions of primary MC carbide after standard heat treatment

Composition Ti Ta W Mo Cr Ni Co Hf C Mass fraction / % 36.49 14.78 19.62 5.60 1.09 2.50 0.62 2.43 16.86 Atomic fraction / % 30.47 3.27 4.27 2.34 0.84 1.71 0.42 0.54 56.15