Numerical simulation and experimental verification of air-jet cooling  control structure for steel sheet

doi:10.13251/j.issn.0254-6051.2020.06.050

Abstract

Abstract: Three kinds of air-jet cooling control structure used for thin steel sheet cooling were simulated and analyzed. By comparing the velocity field and steel sheet temperature field in the air-jet cooling structure, it is determined and experimentally verified that the air-jet cooling control structure with single perforated plate can meet the requirements of steel sheet quenching and can obtain good cooling uniformity. The results show that the uniformity of velocity field and temperature field near the workpiece surface is improved when one or two perforated plates are set up compared with that without perforated plate. When the air-jet cooling control structure with single perforated plate is used to cooling the steel sheet, the maximum temperature difference on the workpiece is about 63.8 ℃ in 20 s. In 20 s, the average temperature of steel sheet is cooled from 920 ℃ to below Ms point (412 ℃), and the lowest cooling rate is about 27.2 ℃/s, which is greater than the critical cooling rate of martensitic transformation (27 ℃/s), that is, the air-jet cooling control structure with single perforated plate can be used for air-jet quenching of steel sheet.

Key words: numerical simulation, air-jet quenching, steel sheet cooling, velocity field, temperature field

CLC Number:

TG155.3

Dong Chengzhi, Liang Xiao, Li Xianjun, Yang Tao, Hou Junqing, Luo Ping. Numerical simulation and experimental verification of air-jet cooling control structure for steel sheet[J]. Heat Treatment of Metals, 2020, 45(6): 239-243.

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Numerical simulation and experimental verification of air-jet cooling control structure for steel sheet

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