镍基铸造高温合金等轴晶凝固成形技术的研究和进展
张军1(),介子奇1,2,黄太文1,杨文超1,刘林1,傅恒志1
Research and Development of Equiaxed Grain Solidification and Forming Technology for Nickel-Based Cast Superalloys
ZHANG Jun1(),JIE Ziqi1,2,HUANG Taiwen1,YANG Wenchao1,LIU Lin1,FU Hengzhi1

图8. 常规工艺和热控凝固条件下细化剂对晶粒组织的影响[68]

Fig.8. The grain structures under different casting conditions[68](a) convention casting process, grain size: 4560 μm(b) convention casting with grain refiners, grain size: 1230 μm(c) thermally-controlled solidification process, grain size: 3340 μm(d) thermally-controlled solidification with grain refiners, grain size: 126 μm (convention casting: pouring temperature is 1380 ℃, mold temperature is 1290 ℃, withdrawal speed is 0 μm/s; thermally-controlled solidification: pouring temperature is 1380 ℃, mold temperature is 1290 ℃, withdrawal speed is 400 μm/s)