晶粒细化对K417G高温合金蠕变性能的影响

都贝宁, 杨金侠, 崔传勇, 孙晓峰

EFFECTS OF GRAIN REFINEMENT ON CREEP PROPERTIES OF K417G SUPERALLOY

DU Beining, YANG Jinxia, CUI Chuanyong, SUN Xiaofeng

表3 4种晶粒尺寸的K417G合金在不同条件下的稳态变形速率K值

Table 3 Steady-state deformation rate K for K417G alloy with four different grain sizes at different conditions (s-1)

Specimen 760 ℃/645 MPa 900 ℃/315 MPa 950 ℃/235 MPa A 0.00406 0.00660 0.00692 B 0.00376 0.00440 0.00762 C 0.00290 0.00639 0.01222 D 0.00350 0.00746 0.01465