难变形高温合金GH4975的铸态组织及均匀化

向雪梅, 江河, 董建新, 姚志浩

As-Cast Microstructure Characteristic and Homogenization of a Newly Developed Hard-Deformed Ni-Based Superalloy GH4975

XIANG Xuemei, JIANG He, DONG Jianxin, YAO Zhihao

表1 GH4975合金1180 ℃不同时间均匀化后元素残余偏析系数

Table 1 Residual segregation indexes of GH4975 alloy after homogenization at 1180 ℃ for different time

Element 5 h 10 h 20 h 50 h Ti 0.38 0.25 0.20 0.15 Nb 0.32 0.23 0.21 0.16 W 0.83 0.68 0.53 0.27