Finite element analysis of quenching process of large forging of Cr-Ni-Mo-V medium carbon heat-resistant high-strength steel

doi:10.13251/j.issn.0254-6051.2023.05.022

Abstract

Abstract: To avoid the phenomenon of quenching cracking due to uneven microstructure of large forging, the temperature, stress and microstructure fields of large forging made of medium carbon Cr-Ni-Mo-V heat-resistant high-strength steel during quenching at 940 ℃ were numerically simulated using DEFORM finite element software. The results show that the temperature difference between core and surface of the Cr-Ni-Mo-V steel large forging exceeds 600 ℃ during quenching process, and the internal stress is mainly concentrated at the step position. According to the simulation results, the adopting of the quenching process of “water quenching for 14 min+air cooling for 10 min+water quenching” can greatly reduce the internal stress in the step position and avoid quenching cracking of the forging while ensuring the microstructure is similar to that of conventional water cooling.

Key words: Cr-Ni-Mo-V medium carbon heat-resistant high-strength steel, quenching, temperature field, stress field, microstructure field

CLC Number:

TG156.3

Yang Hongtao, Liu Kehong, Jia Qihui, Wu Runsheng, Zhao Ziheng, Li Wei. Finite element analysis of quenching process of large forging of Cr-Ni-Mo-V medium carbon heat-resistant high-strength steel[J]. Heat Treatment of Metals, 2023, 48(5): 138-144.

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