<strong>K439B</strong>铸造高温合金<strong>800</strong>℃长期时效组织与性能演变

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 800^oC

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

图4 K439B合金800℃长期时效过程中枝晶干γ′相尺寸与时间的关系

Fig.4 Relationship between size of γ′ precipitates in the dendrite core and aging time of K439B alloy at 800^oC ( ${\bar{r}}_{0}$ —average radius of γ′ after aging for 0 h; $\bar{r}$ —average radius of γ′ after aging for time t; k—LSW theory coarsening rate constant; R²—coefficient of determination)