K439B铸造高温合金800℃长期时效组织与性能演变

张雷雷, 陈晶阳, 汤鑫, 肖程波, 张明军, 杨卿

Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800oC

ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing

表1 K439B合金800℃长期时效不同时间后枝晶干部位γ′相的尺寸、体积分数及形状因子

Table 1 Size, volume fraction, and shape factor of γ′ precipitates in the dendrite core of K439B alloy subjected to long-term aging at 800oC

Aging Average Volume Feret ratio time / h size / nm fraction / % 0 47.0 ± 1.9 22.9 ± 1.2 1.09 ± 0.03 100 51.8 ± 1.4 23.4 ± 0.9 1.29 ± 0.02 500 74.3 ± 2.3 23.7 ± 1.0 1.34 ± 0.01 1000 92.4 ± 2.5 23.1 ± 0.8 1.36 ± 0.01 2000 112.6 ± 3.5 23.2 ± 1.6 1.39 ± 0.01 3000 120.3 ± 2.2 24.5 ± 1.7 1.42 ± 0.01