A one-dimensional unsteady heat transfer model was established for the cyclic spray cooling heat transfer of strip steel protective atmosphere. The temperature field of strip steel was calculated by finite difference numerical calculation method. The comprehensive heat transfer coefficient required of the strip steel at different thicknesses, different initial temperatures and operating speeds were determined. The effects of structural parameters of the spray box and the parameters of the circulating cooling medium on strip steel outlet temperature were studied. The results showed that there was a maximum operating velocity for strip steel with different thicknesses on the premise of meeting the performance requirements and safety. For strip steel with thickness of more than 3 mm, the influence of the section temperature difference on the strip steel properties could not be ignored. The temperature of strip steel outlet increased with the increase of the ratio (H/D) of distance between strip and orifice (H) to orifice diameter (D), but increase rate gradually decreased as ?/D increased. There was an optimal range of the ratio (?n/D) of the orifice spacing (?n) to the orifice diameter (D) which was related to H. Therefore, when actually designing the spray box structure, it is necessary to consider not only the optimal value of D, but also the H. As the temperature of the cooling medium increased by 10℃, strip steel outlet temperature increased by about 3℃. When the volume percentage of hydrogen in the cooling medium and the flow rate of the cooling medium increased, the temperature of strip steel outlet decreased, however, the decrease rate gradually decreased as the volume percentage of hydrogen in the cooling medium and its flow rate increased. The industrial application results showed that the calculated value of the outlet temperature of strip steel was in good agreement with the measured value, and the error was about 3.4% which meant that the model met the application requirements.
Ping'an CHEN Fangqin DAI Yue GUO Luwei PAN Jiangjun KE Jiamou WU Yuansheng LEI Yuncheng LI
. Numerical simulation on thermal process of recycling jet cooling in heat treatment of strip steel in protective hydrogen atmosphere[J]. The Chinese Journal of Process Engineering, 2019
, 19(4)
: 750
-758
.
DOI: 10.12034/j.issn.1009-606X.218285
[1] 李九龄，胡八虎，陈永朋．热镀锌设备与工艺[M]．北京：冶金工业出版社，2015; 191.
[2]Li J L, Hu B H, Chen Y P． Hot-dip galvanizing equipment and process[M].Beijing: Metallurgical Industry Press, 2005; 191.
[3] Vladimir B.Ginzburg．板带轧制工艺学[M]．王国栋译．北京：冶金工业出版社，1998．
[4]Vladimir B.Ginzburg. Strip rolling process [M]. Wang Guodong translation. Beijing: Metallurgical Industry Press, 1998.
[5] 日本钢铁协会．板带轧制理论与实践[M]．王国栋，吴国良等译．北京：中国铁道出版社，1995．
[6]Japan Iron and Steel Association.Strip rolling theory and practice [M]. Translated by Wang G D, Wu G L, etc. Beijing: China Railway Publishing House, 1995.
[7] Wirtnik K P.High-Performance Hydrogen Annealing [ J]. 1990. 17(1); 1 .[J].Heat Treatment of Metals, 1990, 17(1):1-1
[8] Raick Jean-Marc, Crutzen Jean-Pierre, Dosogne Edgard, et al .Atmosphere Control During Continuous Heat Treatment of Metal Strips[J].US patent, 2008, 6(10):-
[9]王永萍，鲍戟，高立.连续退火炉冷却技术的发展和现状[J].工业炉, 2002, 24(1):21-24
[10]Wang Y P, Bao T, Gao L.Development and Status Quo of Continuous Annealing Furnace Cooling Technology[J].Industrial Furnace, 2002, 24(1):21-24
[11] 陈昌将.冲击冷却流动与换热特性的数值模拟研究[D].哈尔滨:哈尔滨工程大学, 2012: 1-19.
[12]Chen C J.Numerical simulation of impact cooling flow and heat transfer characteristics [D]. Harbin: Harbin Engineering University,
[13]袁国, 王国栋, 刘相华.带钢超快速冷却条件下的换热过程[J].钢铁研究学报, 2007, 19(5):37-43
[14]Yuan G, Wang G D, Liu X H.Heat transfer process of strip steel under ultra-fast cooling conditions[J].Journal of Iron and Steel Research, 2007, 19(5):37-43
[15] 张靖周，李永康，谭晓茗.阵列射流冲击冷却局部对流换热特性的数值计算与实验研究[J][J].航空学报, 2004, 25(4):339-343
[16]Zhang J Z, Li Y K, Tan X M.umerical calculation and experimental study of local convective heat transfer characteristics of array jet impingement cooling [J][J].Acta Aeronautica et Astronautica Sinica, 2004, 25(4):339-343
[17] Yuan G，Yu M，Wang G D，Liu X H．.heat transfer of hot strip during ultra fast cooling[J][J].Journal of Northeastern University, 2006, 27(4):406-409
[18]彭良贵, 刘相华, 王国栋.超快冷却条件下温度场数值模拟[J].东北大学学报自然科学版, 2004, 25(4):360-362
[19]Peng L G, Liu X H, Wang G D.Numerical simulation of temperature field under ultra-fast cooling conditions [J]. [J].Journal of Northeastern University (Natural Science), 2004, 25(4):360-362
[20] 万飞，王勇勤，金敏．.立式连续退火炉快冷段带钢冷却温度分析计算[J][J].钢铁研究学报, 2011, 23(4):14-18
[21]Wan F, Wang Y Q, Jin M.Analysis and calculation of strip steel cooling temperature in rapid cooling section of vertical continuous annealing furnace [J][J].Journal of Iron and Steel Research, 2011, 23(4):14-18
[22] 余万华，张中平．.热轧钢板在加速冷却时的温度模型[J]．[J].北京科技大学学报, 2005, 27(5):567-570
[23]Yu W H, Zhang Z P.Temperature model of hot rolled steel sheet during accelerated cooling [J]. [J].Journal of University of Science and Technology Beijing, 2005, 27(5):567-570
[24] 陈小林，王国栋，田勇，等．.中厚板超快速冷却条件下的温度模型[J]．[J].钢铁, 2013, 48(10):46-49
[25]Chen X L, WangG D, Tian Y, etc.Temperature model of medium and thick plate under ultra-fast cooling conditions [J]. [J].Iron and Steel,, 2013, 48(10):46-49
[26] Jia F，Jin J Z． .Heat transfer coefficient during cooling water of continuous casting of aluminum alloy [J][J].The Chinese Journal of Nonferrous Metals，, 2001, 11(S1):39-43
[27] Serajzadeh, Siamak．.Modelling of temperature history and phase transformations during cooling of steel [J]．[J].Journal of Materials Processing Technology, 2004, 146(3):311-311
[28]许学成，戴方钦，潘妮，等.带钢热处理过程中喷射冷却数学模型[J].北京：金属热处理, 2018, 43(2):218-225
[29]Xu X C, Dai F Q, Pan N, et al.Mathematical model of jet cooling during heat treatment of strip steel [J].[J].Beijing: Heat Treatment of Metals, 2018, 43(2):218-225
[30]程杰锋，刘正东，唐广波.带钢层流冷却过程数值模拟及卷取温度预测分析[J].北京钢铁, 2010, 45(11):57-57
[31]Cheng J F, Liu Z D, Tang G B.Numerical simulation of laminar cooling process of strip steel and prediction analysis of coiling temperature[J].Beijing: Iron and Steel, 2010, 45(11):57-57
[32] Ananya Mukhopadhyay, Sudipta Sikdar.Implementation of an On-Line Run-Out Table Model in a Hot Strip Mill [J].[J].Journal of Materials Processing Technology ,, 2005, 169:164-164
[33] Deshpande D A, Srinivasa K.Computer Analysis for the Prediction of a strip Profile in cold Rolling[J].[J].Journal of Materials Processing Technology,, 1997, (63):712-717
[34] 杨世铭, 陶文铨.传热学[M].北京:高等教育出版社, 1998; 124.
[35]Yang S M, Tao W Q.Heat transfer [M]. Beijing: Higher Education press, 1998; 124.
[36] INCROPERA F P．Fundamentals of heat and mass transfer[M].New York:Wiley.1990．
