Transactions of Materials and Heat Treatment

Title：Characterization and verification on hot working process windows for GH4738 alloy

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ClassificationCode：TG316.3

year,vol(issue):pagenumber：2021,46(5):207-215

Abstract：

In order to study the hot deformation characteristics of GH4738 alloy, for the conical specimens, the microstructures of GH4738 alloy after solid solution at 1020 ℃ under different thermodynamic parameters (temperature and strain) were obtained respectively by near isothermal hot compression test, and the microstructure evolution of GH4738 alloy under different thermodynamic parameters was studied. Then, the hot working process window of GH4738 alloy was established by studying the grain sizes (mainly including the percentage of recrystallized small grains and the range of grain size) under different thermodynamic parameters. Through the analysis of the hot working process window of GH4738 alloy, if the more uniform microstructure during the deformation process of GH4738 alloy was obtained, the deformation scheme of high temperature and small deformation (the temperature should be higher than 1030 ℃, and the strain should be less than 0.5) or large deformation (the strain should be more than 2.0) should be adopted. Finally, the accuracy of the hot working process window was verified by die forging.

Funds：

陕西省自然科学基础研究计划资助项目(2020JQ-182)；中央高校基本科研业务费专项资金项目(3102019ZX004)

王龙祥（1985-），男，硕士，高级工程师 E-mail：sonilgtcl@163.com 通讯作者：王建国（1987-），男，博士，助理研究员 E-mail：jianguow@nwpu.edu.cn

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