Quenching uniformity control techniques of high-pressure gas quenching  for multiple large thin-wall cylindrical parts

doi:10.13251/j.issn.0254-6051.2024.08.036

Abstract

Abstract: High-pressure gas quenching process of large thin-wall cylindrical parts under multi-piece loading conditions was investigated by establishing a suitable three-dimensional physical model and control equations. According to the numerical simulation results of the flow field and temperature field in the furnace under different loading conditions, it is found that addition of suitable deflector plate can effectively improve the flow field in the furnace, and enhance the homogeneity of the temperature field of the workpieces in condition of meeting the quenching and cooling demand, during the process of gas quenching. The method can be used to solve the non-uniform cooling problem, which exists in the gas quenching of multiple pieces at the same time. Finally, the correctness of the simulation results is verified through experiments, which provides a feasible path for the optimization of the high-pressure gas cooling system, and also provides a theoretical basis for the future improvement of the gas quenching effect of large-scale vertical vacuum gas quenching equipment.

Key words: large thin-wall cylindrical parts with variable wall thickness, vertical vacuum high-pressure gas quenching, vacuum heat treatment, flow field, temperature field

CLC Number:

TG156.3

Li Chuang, Li Qiong, Zhan Yuheng, Cong Peiwu, Lu Wenlin, Yao Jiawei, Han Yongzhen. Quenching uniformity control techniques of high-pressure gas quenching for multiple large thin-wall cylindrical parts[J]. Heat Treatment of Metals, 2024, 49(8): 204-210.

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Quenching uniformity control techniques of high-pressure gas quenching for multiple large thin-wall cylindrical parts

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