高温合金单晶铸件中共晶组织分布的表面效应

马德新, 赵运兴, 徐维台, 皮立波, 李重行

Surface Effect on Eutectic Structure Distribution in Single Crystal Superalloy Castings

MA Dexin, ZHAO Yunxing, XU Weitai, PI Libo, LI Zhongxing

表1 图2d中枝晶干成分(CD)与枝晶间成分(CI)的测量结果及各元素的偏析比(km)

Table 1 Composition measured at dendrite core (CD) and in interdendritic area (CI) in Fig.2d, and evaluated segregation ratio (km)

Element CD / (mass fraction / %) CI / (mass fraction / %) km = CD / CI Cr 3.84 3.55 1.08 Co 6.98 6.76 1.03 W 9.34 5.22 1.79 Mo 0.44 0.35 1.26 Al 4.39 5.19 0.85 Ti 0.05 0.13 0.38 Ta 5.15 9.34 0.55 Re 6.89 3.68 1.87 Ni 62.93 65.78 0.96