Slow Cooling Treatment of High-Alloyed Superalloy

Abstract:

The very poor hot workability of high-alloyed GH4742 superalloy is represented in the aspects of very narrow available deformation temperature range, high deformation-resistant force and poor ductility. In this paper, a special heat treatment to change the ingot microstructure is proposed to improve the hot workability of the GH4742 superalloy. The' phase with a appropriate size and morphology and tortuous grain boundary were obtained by slow cooling in the ' two phases region after solution treatment. Modified microstructure induces that the hot deformation flow stress of GH4742 superalloy was decreased effectively and hot deformation plasticity was increased obviously.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 98-104
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.98
• Online since: February 2012
• Authors: Xu Dong Lu, Jin Hui Du, Qun Deng, Zeng Yong Zhong
• Keywords: High-Alloyed, Nickel Base Superalloy, Slow Cooling Treatment, Workability

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