Forging cracking cause analysis of Ni-based corrosion-resistant alloy Hastelloy C-276

doi:10.13251/j.issn.0254-6051.2021.06.047

Abstract

Abstract: Cracking cause of corrosion resistant alloy Hastelloy C-276 during forging process was analyzed, and the effect of homogenization treatment on its microstructure was studied to improve the forging yield. The results show that there are a lot of μ precipitates in the as-cast microstructure of Hastelloy C-276 alloy, which is the main cause for the forging cracking. By increasing the homogenization heating temperature and prolonging the holding time, the dendrite segregation can be reduced. After heating at 1170 ℃ for 10 h followed with air cooling, the segregation disappears and the forging effect is good.

Key words: Hastelloy C-276, precipitated phase, homogenizing, dendrite segregation

CLC Number:

TG142.1

Ji Shuang, Li Huilin, Zhao Xiujuan, Zhang Yunfei, Zhao Yingli, Chen Wen, Shi Yulong, Xing Chengliang. Forging cracking cause analysis of Ni-based corrosion-resistant alloy Hastelloy C-276[J]. Heat Treatment of Metals, 2021, 46(6): 240-244.

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