Transactions of Materials and Heat Treatment

Title：Numerical simulation on macro-micro coupling of non-uniform heat treatment process for cylindrical forgings with large length-diameter ratio based on actual working condition

Authors： Li Fengcheng Zhai Pengyuan Fan Pengyu

Unit： China North Advanced Technology Gener Lization Institute

KeyWords： cylindrical forgings with large lengthdiameter ratio nonuniform heat treatment carbide multiple physical field variations

ClassificationCode：TG156

year,vol(issue):pagenumber：2025,50(3):102-111

Abstract：

The material characteristic parameters of 40CrNi4Mo1V steel and its phases were determined by software JMatPro, and the non-uniform heat treatment process of cylindrical forgings with large length-diameter ratio prepared by the material was simulated by finite element software Deform based on the actual working condition. Then, the calculation results predicted the temperature field, microstructure field and stress-strain field of the cylindrical forgings successfully, and the dissolution and precipitation laws of various carbides were revealed. The results show that under the non-uniform heat treatment process, stress concentration phenomenon is more likely to occur at the variable cross-section and the head and tail ends of cylindrical forgings with large length-diameter ratio, there is obvious plastic bending at the tail of forgings, and the maximum average stress reaches more than 150 MPa. After quenching, the residual austenite content of forgings is reduced to 091%, and the martensite content is increased to 984%. In addition, when the tempering temperature of forgings is higher, the carbide precipitation is faster, and the hardness of forgings is higher at the same time.

Funds：

国防基础科研计划（JCKY2022208A002）

作者简介：李峰诚（1997-），男，硕士，工程师 E-mail：lifengcheng2012@163.com 通信作者：翟鹏远（1989-），男，硕士，高级工程师 E-mail：zhaipy@gfcn.cn

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