带钢热处理过程中喷射冷却数学模型
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摘要
针对带钢热处理过程中喷射冷却过程建立了数学模型,采用数学模型研究了带钢参数、喷冷单元参数和循环冷却介质参数对换热性能的影响。结果表明:对于超过2 mm厚度的带钢,实际生产中要充分考虑冷却速度对断面温差的影响;对于不同厚度的带钢,存在一个最大冷速值;带钢厚度每增加一倍,达到相同冷速需要的换热系数也增加一倍;对于不同的喷孔间距,随着喷孔直径的变化,对流换热系数呈抛物线趋势变化,存在一个最佳喷孔直径。本文建立的数学模型经实际生产验证,误差较小,可满足实际生产过程。
Mathematical model of jet cooling during heat treatment of steel strip was established. Effects of strip parameters,jet cooling unit parameters and the cooling medium parameters on the heat transfer performance were studied. The results show that,for the strip with a thickness more than 2 mm,effect of cooling rate on the temperature difference of the strip should be taken into account; there is a maximum cooling rate for different thickness of strip; if the strip thickness is doubled,the heat transfer coefficient of the same cooling rate is doubled;the convection heat transfer coefficient has a parabolic trend with the change of the jet hole diameter,and there is an optimal spray hole diameter for different spray hole spacing. The mathematical model is verified with small errors by practical production,which can meet the actual production process.
Mathematical model of jet cooling during heat treatment of steel strip was established. Effects of strip parameters,jet cooling unit parameters and the cooling medium parameters on the heat transfer performance were studied. The results show that,for the strip with a thickness more than 2 mm,effect of cooling rate on the temperature difference of the strip should be taken into account; there is a maximum cooling rate for different thickness of strip; if the strip thickness is doubled,the heat transfer coefficient of the same cooling rate is doubled;the convection heat transfer coefficient has a parabolic trend with the change of the jet hole diameter,and there is an optimal spray hole diameter for different spray hole spacing. The mathematical model is verified with small errors by practical production,which can meet the actual production process.
引文
[1]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.
[2]日本钢铁协会.板带轧制理论与实践[M].王国栋,吴国良,毕玉伟,等译.北京:中国铁道出版社,1995.
[3]张利平,刘艳林,韩杰,等.冷却工艺对Ti微合金高强钢组织和性能的影响[J].金属热处理,2016,41(1):74-78.Zhang Liping,Liu Yanlin,Han Jie,et al.Effect of cooling process on microstructure and properties of Ti-microalloyed high strength steel[J].Heat Treatment of Metals,2016,41(1):74-78.
[4]余万华,徐绿婷,张永军,等.65Mn钢连续冷却转变特性的试验研究[J].金属热处理,2010,35(1):47-50.Yu Wanhua,Xu Lüting,Zhang Yongjun,et al.Characteristic of 65Mn steel during continuous cooling transformation[J].Heat Treatment of Metals,2010,35(1):47-50.
[5]袁晓敏,胡珊珊,张义伟,等.控制冷却工艺对12Cr1Mo V锅炉钢组织与性能的影响[J].金属热处理,2015,40(6):116-120.Yuan Xiaomin,Hu Shanshan,Zhang Yiwei,et al.Effects of controlled cooling process on microstructure and mechanical properties of12Cr1Mo V boiler steel[J].Heat Treatment of Metals,2015,40(6):116-120.
[6]Han Je-Chin,Dutta Sandip.燃气轮机传热与冷却技术[M].程代京,谢永慧,译.西安:西安交通大学出版社,2005:171.
[7]耿铁,李德群,周华民,等.冲击射流及其强化换热的研究进展[J].机械设计与制造,2006(6):154-156.Geng Tie,Li Dequn,Zhou Huamin,et al.Development of the studies about heat transfer with impinging jets[J].Machinery Design and Manufacture,2006(6):154-156.
[8]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.Chen Changjiang.Numerical Investigation on Flow and Heat Transfer Characteristics of Impingement Cooling[D].Harbin:Harbin Engineering University,2012:1-19.
[9]王有铭,李曼云,韦光.钢材的控制轧制和控制冷却[M].北京:冶金工业出版社,1995.
[10]武斌.冷轧硅钢热处理线中气体喷射冷却技术概述[J].工业炉,2015,37(2):11-14.Wu Bin.Overview of gas impinging cooling technology in cold rolling silicon steel sheet heat processing line[J].Industrial Furnace,2015,37(2):11-14.
[11]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.Peng Lianggui,Liu Xianghua,Wang Guodong.Simulation on temperature field under ultra fast cooling[J].Journal of Northeastern University(Natural Science),2004,25(4):360-362.
[12]张刚.带钢喷吹冷却设备几个设计参数的探讨[J].工业炉,2013,35(3):38-41.Zhang Gang.Discussion on some design parameters of jet cooling equipment for steel strip[J].Industrial Furnace,2013,35(3):38-41.
[13]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].钢铁研究学报,2011,23(4):14-18.Wan Fei,Wang Yongqin,Jin Min.Analysis and calculation for rapid cooling temperature of strip in the continuous annealing furnace[J].Journal of Iron and Steel Research,2011,23(4):14-18.
[14]刘祖铃.狭缝喷嘴组冲击射流传热性能研究[D].重庆:重庆大学,2012.Liu Zuling.Study of Heat Transfer Characteristics of an Array of Impinging Slot Jets[D].Chongqing:Chongqing University,2012.
[15]王秉铨.工业炉设计手册[M].北京:机械工业出版社,1996.
[16]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.Yuan Guo,Wang Guodong,Liu Xianghua.Heat transfer process of hot strip under ultra-fast cooling condition[J].Journal of Iron and Steel Research,2007,19(5):37-43.
[17]Deshpande D A,Srinivasa K.Computer analysis for the prediction of a strip profile in cold rolling[J].Journal of Materials Processing Technology,1997,63:712-717.
[18]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,1998.
[19]Incropera F P.Fundamentals of heat and mass transfer[M].New York:Wiley,1990.
[2]日本钢铁协会.板带轧制理论与实践[M].王国栋,吴国良,毕玉伟,等译.北京:中国铁道出版社,1995.
[3]张利平,刘艳林,韩杰,等.冷却工艺对Ti微合金高强钢组织和性能的影响[J].金属热处理,2016,41(1):74-78.Zhang Liping,Liu Yanlin,Han Jie,et al.Effect of cooling process on microstructure and properties of Ti-microalloyed high strength steel[J].Heat Treatment of Metals,2016,41(1):74-78.
[4]余万华,徐绿婷,张永军,等.65Mn钢连续冷却转变特性的试验研究[J].金属热处理,2010,35(1):47-50.Yu Wanhua,Xu Lüting,Zhang Yongjun,et al.Characteristic of 65Mn steel during continuous cooling transformation[J].Heat Treatment of Metals,2010,35(1):47-50.
[5]袁晓敏,胡珊珊,张义伟,等.控制冷却工艺对12Cr1Mo V锅炉钢组织与性能的影响[J].金属热处理,2015,40(6):116-120.Yuan Xiaomin,Hu Shanshan,Zhang Yiwei,et al.Effects of controlled cooling process on microstructure and mechanical properties of12Cr1Mo V boiler steel[J].Heat Treatment of Metals,2015,40(6):116-120.
[6]Han Je-Chin,Dutta Sandip.燃气轮机传热与冷却技术[M].程代京,谢永慧,译.西安:西安交通大学出版社,2005:171.
[7]耿铁,李德群,周华民,等.冲击射流及其强化换热的研究进展[J].机械设计与制造,2006(6):154-156.Geng Tie,Li Dequn,Zhou Huamin,et al.Development of the studies about heat transfer with impinging jets[J].Machinery Design and Manufacture,2006(6):154-156.
[8]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.Chen Changjiang.Numerical Investigation on Flow and Heat Transfer Characteristics of Impingement Cooling[D].Harbin:Harbin Engineering University,2012:1-19.
[9]王有铭,李曼云,韦光.钢材的控制轧制和控制冷却[M].北京:冶金工业出版社,1995.
[10]武斌.冷轧硅钢热处理线中气体喷射冷却技术概述[J].工业炉,2015,37(2):11-14.Wu Bin.Overview of gas impinging cooling technology in cold rolling silicon steel sheet heat processing line[J].Industrial Furnace,2015,37(2):11-14.
[11]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.Peng Lianggui,Liu Xianghua,Wang Guodong.Simulation on temperature field under ultra fast cooling[J].Journal of Northeastern University(Natural Science),2004,25(4):360-362.
[12]张刚.带钢喷吹冷却设备几个设计参数的探讨[J].工业炉,2013,35(3):38-41.Zhang Gang.Discussion on some design parameters of jet cooling equipment for steel strip[J].Industrial Furnace,2013,35(3):38-41.
[13]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].钢铁研究学报,2011,23(4):14-18.Wan Fei,Wang Yongqin,Jin Min.Analysis and calculation for rapid cooling temperature of strip in the continuous annealing furnace[J].Journal of Iron and Steel Research,2011,23(4):14-18.
[14]刘祖铃.狭缝喷嘴组冲击射流传热性能研究[D].重庆:重庆大学,2012.Liu Zuling.Study of Heat Transfer Characteristics of an Array of Impinging Slot Jets[D].Chongqing:Chongqing University,2012.
[15]王秉铨.工业炉设计手册[M].北京:机械工业出版社,1996.
[16]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.Yuan Guo,Wang Guodong,Liu Xianghua.Heat transfer process of hot strip under ultra-fast cooling condition[J].Journal of Iron and Steel Research,2007,19(5):37-43.
[17]Deshpande D A,Srinivasa K.Computer analysis for the prediction of a strip profile in cold rolling[J].Journal of Materials Processing Technology,1997,63:712-717.
[18]杨世铭,陶文铨.传热学[M].北京:高等教育出版社,1998.
[19]Incropera F P.Fundamentals of heat and mass transfer[M].New York:Wiley,1990.