介质流量密度对铝合金喷射淬火界面热交换率的影响规律及机理

doi:10.13251/j.issn.0254-6051.2022.02.043

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 243-249.DOI: 10.13251/j.issn.0254-6051.2022.02.043

介质流量密度对铝合金喷射淬火界面热交换率的影响规律及机理

徐戎¹, 李落星²

1.湖南文理学院机械工程学院, 湖南常德 415000;
2.湖南大学机械与运载工程学院, 湖南长沙 410082

收稿日期:2021-10-13 修回日期:2021-12-20 出版日期:2022-02-25 发布日期:2022-04-01
通讯作者: 李落星, 教授,博士,E-mail: llxly2000@163.com
作者简介:徐戎(1980—), 男, 副教授,博士,主要研究方向为材料压力加工先进制造技术,E-mail: samxurong@163.com。
基金资助:
湖南省教育厅科研项目(20B406);湖南省自然科学基金(2018JJ2274);湖南省高等学校“双一流”建设项目(湘教通〔2018〕469);湖南省高等学校创新团队项目(湘教通[2019]379)

Influence law and mechanism of medium flow density on heat exchange rate of jet quenching interface of aluminum alloy

Xu Rong¹, Li Luoxing²

1. College of Mechanical Engineering, Hunan University of Arts and Science, Changde Hunan 415000, China;
2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha Hunan 410082, China

Received:2021-10-13 Revised:2021-12-20 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 通过喷射淬火试验,研究了在高温铝合金表面进行水射流淬火、喷雾淬火和高速空气淬火的热交换过程,并对这3种在线淬火界面的热流密度 (q) 和传热系数 (h) 进行了反分析求解,重点探究了试样表面介质流量密度 (q_s) 对界面热交换率的影响规律及其机理。结果表明,随q_s增大,喷射淬火界面热交换率先增大后减小,即存在一个临界q_s,此时临界热流密度 (q_c) 取得最大值。当q_s小于其临界值时,喷射淬火界面热交换率随q_s增大而增大;当q_s大于临界值时,随q_s继续增大,喷射淬火界面热交换率反而减小。喷雾淬火的单位体积冷却介质最大吸热量 (Q_max) 最高,且淬火介质相同时,Q_max随q_s增大而减小。增大q_s对提高喷水淬火表面的热交换率效果最好。

关键词: 喷射淬火, 在线淬火, 界面热交换率, 界面热流密度, 介质流量密度

Abstract: The heat exchange processes of water jet quenching, spray quenching and high speed air quenching on high temperature aluminum alloy surface were studied by jet quenching test. The heat flux (q) and heat transfer coefficient (h) of the three kinds of on-line quenching interface were calculated by back analysis method, and the influence law and mechanism of the medium flux density (q_s) on the interface heat exchange rate were mainly investigated. The results show that with the increase of q_s, the heat exchange rate of quenching interface increases first and then decreases. There is a critical q_s, when the critical heat current density (q_c) reaches the maximum value. When q_s is less than its critical value, the interfacial heat exchange rate increases with the increase of q_s. When q_s is greater than the critical value, the interfacial heat exchange rate decreases with the increase of q_s.The maximum heat absorption (Q_max) of the unit volume cooling medium in spray quenching is the highest, and when the quenching medium is the same, the Q_max decreases with the increase of q_s. Increasing q_s has the best effect on improving the heat exchange rate of water jet quenching surface.

Key words: jet quenching, on-line quenching, interface heat exchange rate, interfacial heat flux, medium flow density

中图分类号:

TG379

徐戎, 李落星. 介质流量密度对铝合金喷射淬火界面热交换率的影响规律及机理[J]. 金属热处理, 2022, 47(2): 243-249.

Xu Rong, Li Luoxing. Influence law and mechanism of medium flow density on heat exchange rate of jet quenching interface of aluminum alloy[J]. Heat Treatment of Metals, 2022, 47(2): 243-249.

参考文献

[1]赵茂密, 秦颐鸣, 零妙然, 等. 大型挤压在线淬火装备的现状和改进方案研究[J]. 铝加工, 2019(3): 51-54, 57.
Zhao Maomi, Qin Yiming, Ling Miaoran, et al. Current situation and improvement scheme of large online quenching equipment[J]. Aluminum Fabrication, 2019(3): 51-54, 57.
[2]Wang B X, Guo X T, Xie Q, et al. Heat transfer characteristic research during jet impinging on top/bottom hot steel plate[J]. International Journal of Heat and Mass Transfer, 2016, 101(10): 844-851.
[3]Jha J M, Ravikumar S V, Haldar K, et al. Heat transfer from a hot moving steel plate by air-atomized spray impingement[J]. Experimental Heat Transfer, 2016, 29(1): 78-96.
[4]Mozumder A K, Monde M, Woodfield P L, et al. Maximum heat flux in relation to quenching of a high temperature surface with liquid jet impingement[J]. International Journal of Heat and Mass Transfer, 2006, 49(17/18): 2877-2888.
[5]Chen R H, Chow L C, Navedo J E. Effects of spray characteristics on critical heat flux in subcooled water spray cooling[J]. International Journal of Heat and Mass Transfer, 2002, 45(19): 4033-4043.
[6]Langari M, Yang Z, Dunne J F, et al. Multi-phase CFD-conjugate heat transfer for spray cooling in the non-boiling regime[J]. The Journal of Computational Multiphase Flows, 2018, 10(1): 33-42.
[7]Li Y Y, Liu Z H, Wang Q. Experimental study on critical heat flux of steady boiling for high-velocity slot jet impinging on the stagnation zone[J]. International Journal of Heat and Mass Transfer, 2014, 70(3): 1-9.
[8]Gao J N, Gao Y, Xu Q R, et al. Simulation on flow, heat transfer and stress characteristics of large-diameter thick-walled gas cylinders in quenching process under different water spray volumes[J]. Journal of Central South University, 2019, 26(11): 3188-3199.
[9]Jeyajothi K, Kalaichelvi P. Augmentation of heat transfer and investigation of fluid flow characteristics of an impinging air jet on to a flat plate[J]. Arabian Journal for Science and Engineering, 2019, 44(6): 5289-5299.
[10]Fu P, Zhou P, Zhao T Y, et al. Study of the heat transfer coefficient of a nickel-based superalloy in the end-quench test with air[J]. International Journal of Thermal Sciences, 2020, 155: 106416.
[11]徐戎, 李落星, 王震虎. 铝合金喷雾淬火界面传热系数的反分析求解[J]. 金属热处理, 2018, 43(10): 232-236.
Xu Rong, Li Luoxing, Wang Zhenhu. Determination of interfacial heat transfer coefficient of aluminum alloy during spray quenching based on inverse analysis method[J]. Heat Treatment of Metals, 2018, 43(10): 232-236.
[12]徐戎, 李落星, 王震虎. 基于反热传导法的铝合金喷水冷却界面换热系数求解[J]. 金属热处理, 2018, 43(11): 202-207.
Xu Rong, Li Luoxing, Wang Zhenhu. Calculation of interfacial heat transfer coefficient of aluminum alloy spraying cooled based on inverse heat conduction method[J]. Heat Treatment of Metals, 2018, 43(11): 202-207.
[13]Zhang L Q, Li L X. Determination of heat transfer coefficients at metal/chill interface in the casting solidification process[J]. Heat and Mass Transfer, 2013, 49(8): 1071-1080.
[14]刘露露. 6×××系铝合金在线淬火TTP曲线的研究[D]. 长沙: 中南大学, 2012: 41-44.

介质流量密度对铝合金喷射淬火界面热交换率的影响规律及机理

Influence law and mechanism of medium flow density on heat exchange rate of jet quenching interface of aluminum alloy

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