Simulation on continuous quenching process of rod based on segmented thermal boundary

doi:10.13251/j.issn.0254-6051.2022.10.045

Abstract

Abstract: A segmented thermal boundary method for numerical simulation of continuous quenching process is proposed, and the model segmentation criterion is obtained. Taking 30CrNi3MoV steel porous rod as an example, the water quenching simulation was carried out by using MARC software, and the temperature field, stress field, microstructure distribution ratio and hardness field were obtained. The simulation results show that the segmented thermal boundary method is more in line with the actual working conditions than the overall thermal boundary quenching simulation, and the internal temperature of the workpiece decreases with the increase of the water depth, and the stress of the workpiece decreases from the front end to the back end of the workpiece. The surface hardness after quenching is 51.9-53.7 HRC and the core hardness is 36.8 HRC, which is not more than 10% different from the hardness of the workpiece after actual quenching. The distortion of the hole to the center is 0.18-0.20 mm, and the distortion of the workpiece length is 1.85 mm. which is within 5% difference from the distortion of the hole and the workpiece. All that verifies the accuracy of the segmented thermal boundary method.

Key words: segmented thermal boundary, 30CrNi3MoV steel, MARC, tissue hardness, displacement

CLC Number:

He Haoping, Wang Fazhan, Jing Shuowen, Xu Zhenghao, Huang Kepeng. Simulation on continuous quenching process of rod based on segmented thermal boundary[J]. Heat Treatment of Metals, 2022, 47(10): 263-269.

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