低合金连铸坯粗轧前高压水除鳞换热系数的研究
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摘要
根据试验获得的钢板内部冷却曲线,采用DEFORM反传热模型计算出低合金钢板高压水除鳞对流换热系数。在计算中考虑了水压、除鳞喷嘴距钢板表面距离、钢板表面温度对换热系数的影响。为了便于应用,对不同工况计算得到的高压水除鳞换热系数进行归纳整理,然后采用非线性回归方法回归出高压水除鳞对流换热系数模型。为了验证回归的换热系数模型正确性,将国内某钢厂现场生产实际工况的参数代入换热系数模型,计算得到对应工况下的高压水除鳞对流换热系数。根据此换热系数采用有限元软件模拟连铸坯除鳞温度场,通过有限元模拟温度和现场实测温度曲线的比较,两者吻合度较高,证明了回归的高压水除鳞换热系数模型合理。
The high pressure water convective heat transfer coefficient of low alloy steel sheet was calculated by inverse heat transfer model of DEFORM during the high pressure water descaling process according to the cooling curves obtained by experiments. The water pressure,the distance from billet surface to descaling spray nozzle and the billet surface temperature were considered during the calculation.To facilitating application,the convective heat transfer coefficient of high pressure water descaling obtained in different working conditions were summed up,and the regression mathematical model of convective heat transfer coefficient of high pressure water descaling was established by the nonlinear regression method. To verify correctness of the model for heat transfer coefficient,the parameters under actual working condition of a domestic steel plant were plugged into the heat transfer coefficient model,and the convective heat transfer coefficient of high pressure water descaling was calculated under corresponding working condition. Finite element software was used to simulate the descaling temperature field of continuous casting billet according to the convective heat transfer coefficient. The comparison between the finite element simulation temperature and the field measured temperature curves shows that the two results are highly consistent,which prove that the model for convective heat transfer coefficient of high pressure water descaling is reasonable.
The high pressure water convective heat transfer coefficient of low alloy steel sheet was calculated by inverse heat transfer model of DEFORM during the high pressure water descaling process according to the cooling curves obtained by experiments. The water pressure,the distance from billet surface to descaling spray nozzle and the billet surface temperature were considered during the calculation.To facilitating application,the convective heat transfer coefficient of high pressure water descaling obtained in different working conditions were summed up,and the regression mathematical model of convective heat transfer coefficient of high pressure water descaling was established by the nonlinear regression method. To verify correctness of the model for heat transfer coefficient,the parameters under actual working condition of a domestic steel plant were plugged into the heat transfer coefficient model,and the convective heat transfer coefficient of high pressure water descaling was calculated under corresponding working condition. Finite element software was used to simulate the descaling temperature field of continuous casting billet according to the convective heat transfer coefficient. The comparison between the finite element simulation temperature and the field measured temperature curves shows that the two results are highly consistent,which prove that the model for convective heat transfer coefficient of high pressure water descaling is reasonable.
引文
[1]张凤军,张国忠.轧钢生产高压水除鳞系统的设计[J].江苏冶金,2007,35(1):17-21.ZHANG Fengjun,ZHANG Guozhong.The design of high pressure water descaling system on rolling steel[J].Jiangsu Metallurgy,2007,35(1):17-21.
[2]黄华,徐李军,时朋召.碳钢热轧中厚板一次氧化铁皮形成机制-剥离性能和工艺改善[J].特殊钢,2017,38(2):33-36.HUANG Hua,XU Lijun,SHI Pengzhao.Formation mechanismremovability of primary scales of carbon steel hot-rolled heavy-medium plate and process improvement[J].Special Steel,2017,38(2):33-36.
[3]肖铁忠,罗静,龚文均,等.高压水除鳞系统的设计及应用[J].锻压技术,2013,38(5):155-157.XIAO Tiezhong,LUO Jing,GONG Wenjun,et al.Design and application of high-pressure water descaling system[J].Forging&Stamping Technology,2013,38(5):155-157.
[4]赵军,张磊.中板工序高压水除鳞系统的改进[J].冶金设备,2008,168(2):58-60.ZHAO Jun,ZHANG Lei.Improvement of the high pressure water descaling system of the medium plate process[J].Metallurg ICAL Equipment,2008,168(2):58-60.
[5]李小龙,周敦世,周立新,等.42Cr Mo钢轧制工艺优化[J].锻压技术,2017,42(1):71-74.LI Xiaolong,ZHOU Dunshi,ZHOU Lixin,et al.Optimization on rolling process for steel 42Cr Mo[J].Forging&Stamping Technology,2017,42(1):71-74.
[6]杨要兵,余伟.船板钢轧制过程中的一种温度模型的研究[J].塑性工程学报,2006,13(3):60-64.YANG Yaobing,YU Wei.Research of a temperature modelling in the rolling course of board steel of ship[J].Journal of Plasticity Engineering,2006,13(3):60-64.
[7]WADA T,OSHIMI M,UEDA M.Temperature drop of steel by hydraulic descaling for a hot strip rolling mill[J].Tetsu-toHagane,1991,77(9):1458-1464.
[8]SELLARS C M.Computer modeling of hot working processes[J].Materials Science and Technology,1985,1(4):325-332.
[9]VLADIMIR B G.High quality steel rolling[M].New York:Marcel Dekker Inc,1993.
[10]CHOI J W.Convective heat transfer coefficient for high pressure water jet[J].ISIJ International,2002,42(3):283-289.
[11]汪贺模,蔡庆伍,余伟,等.水流量对热轧钢板层流冷却过程对流换热系数的影响[J].北京科技大学学报,2012,34(12):1422-1423.WANG Hemo,CAI Qingwu,YU Wei,et al.Effect of water flow rate on the heat transfer coefficient of a hot steel plate during laminar flow cooling[J].Journal of University of Science and Technology Beijing,2012,34(12):1422-1423.
[12]JU D Y,SHIMIZU N Y,MUKAI R.Simultaneous identification on multi-positions for heat transfer coefficient in quench in quenching of steel[C]//4th International Conference on Quenching and the Control of Distortion.Beijing,2003:105-110.
[13]KIM H K,OH S I.Evaluation of heat transfer coefficient during heat treatment by inverse analysis[J].Journal of Materials Processing Technology,2001,112(2):157-165.
[14]王婧,陈乃录,张伟民,等.气淬过程中换热系数的数值模拟[J].热加工工艺,2007,36(2):70-75.WANG Jing,CHEN Nailu,ZHANG Weimin,et al.Numerical simulation of heat transfer coefficient during gas quenching process[J].Hot Working Technology,2007,36(2):70-75.
[15]丁冬芳,邵宝东,程赫明,等.常压高速气雾喷射淬火表面换热系数[J].辽宁工程技术大学学报(自然科学版),2011,30(3):472-475.DING Dongfang,SHAO Baodong,CHENG Heming,et al.Surface heat transfer coefficient of nitrogen-spray water eject quenching under normal pressure and high velocity[J].Journal of Liaoning Technical University(Natural Science),2011,30(3):472-475.
[16]李辉平,赵国群,牛山廷,等.基于有限元和最优化方法的淬火冷却过程反传热分析[J].金属学报,2005,41(2):167-172.LI Huiping,ZHAO Guoqun,NIU Shanting,et al.Inverse heat conduction analysis of quenching process based on finite element and optimization method[J].Acta Metallrugica Sinica,2005,41(2):167-172.
[17]曹欣,孙志超,杨合.基于DEFORM反传热模型表面换热系数的确定[J].塑性工程学报,2013,20(2):130-135.CAO Xin,SUN Zhichao,YANG He.Determination of surface heat transfer coefficient via inverse heat transfer model based on DEFORM software[J].Journal of Plasticity Engineering,2013,20(2):130-135.
[18]童朝南,高宇德.钢板水冷过程换热系数建模的一种实用方法[J].钢铁,2011,46(7):50-55.TONG Chaonan,GAO Yude.A useful method of building the heat transfer coefficient model in steel cooling process[J].Iron and Steel,2011,46(7):50-55.
[2]黄华,徐李军,时朋召.碳钢热轧中厚板一次氧化铁皮形成机制-剥离性能和工艺改善[J].特殊钢,2017,38(2):33-36.HUANG Hua,XU Lijun,SHI Pengzhao.Formation mechanismremovability of primary scales of carbon steel hot-rolled heavy-medium plate and process improvement[J].Special Steel,2017,38(2):33-36.
[3]肖铁忠,罗静,龚文均,等.高压水除鳞系统的设计及应用[J].锻压技术,2013,38(5):155-157.XIAO Tiezhong,LUO Jing,GONG Wenjun,et al.Design and application of high-pressure water descaling system[J].Forging&Stamping Technology,2013,38(5):155-157.
[4]赵军,张磊.中板工序高压水除鳞系统的改进[J].冶金设备,2008,168(2):58-60.ZHAO Jun,ZHANG Lei.Improvement of the high pressure water descaling system of the medium plate process[J].Metallurg ICAL Equipment,2008,168(2):58-60.
[5]李小龙,周敦世,周立新,等.42Cr Mo钢轧制工艺优化[J].锻压技术,2017,42(1):71-74.LI Xiaolong,ZHOU Dunshi,ZHOU Lixin,et al.Optimization on rolling process for steel 42Cr Mo[J].Forging&Stamping Technology,2017,42(1):71-74.
[6]杨要兵,余伟.船板钢轧制过程中的一种温度模型的研究[J].塑性工程学报,2006,13(3):60-64.YANG Yaobing,YU Wei.Research of a temperature modelling in the rolling course of board steel of ship[J].Journal of Plasticity Engineering,2006,13(3):60-64.
[7]WADA T,OSHIMI M,UEDA M.Temperature drop of steel by hydraulic descaling for a hot strip rolling mill[J].Tetsu-toHagane,1991,77(9):1458-1464.
[8]SELLARS C M.Computer modeling of hot working processes[J].Materials Science and Technology,1985,1(4):325-332.
[9]VLADIMIR B G.High quality steel rolling[M].New York:Marcel Dekker Inc,1993.
[10]CHOI J W.Convective heat transfer coefficient for high pressure water jet[J].ISIJ International,2002,42(3):283-289.
[11]汪贺模,蔡庆伍,余伟,等.水流量对热轧钢板层流冷却过程对流换热系数的影响[J].北京科技大学学报,2012,34(12):1422-1423.WANG Hemo,CAI Qingwu,YU Wei,et al.Effect of water flow rate on the heat transfer coefficient of a hot steel plate during laminar flow cooling[J].Journal of University of Science and Technology Beijing,2012,34(12):1422-1423.
[12]JU D Y,SHIMIZU N Y,MUKAI R.Simultaneous identification on multi-positions for heat transfer coefficient in quench in quenching of steel[C]//4th International Conference on Quenching and the Control of Distortion.Beijing,2003:105-110.
[13]KIM H K,OH S I.Evaluation of heat transfer coefficient during heat treatment by inverse analysis[J].Journal of Materials Processing Technology,2001,112(2):157-165.
[14]王婧,陈乃录,张伟民,等.气淬过程中换热系数的数值模拟[J].热加工工艺,2007,36(2):70-75.WANG Jing,CHEN Nailu,ZHANG Weimin,et al.Numerical simulation of heat transfer coefficient during gas quenching process[J].Hot Working Technology,2007,36(2):70-75.
[15]丁冬芳,邵宝东,程赫明,等.常压高速气雾喷射淬火表面换热系数[J].辽宁工程技术大学学报(自然科学版),2011,30(3):472-475.DING Dongfang,SHAO Baodong,CHENG Heming,et al.Surface heat transfer coefficient of nitrogen-spray water eject quenching under normal pressure and high velocity[J].Journal of Liaoning Technical University(Natural Science),2011,30(3):472-475.
[16]李辉平,赵国群,牛山廷,等.基于有限元和最优化方法的淬火冷却过程反传热分析[J].金属学报,2005,41(2):167-172.LI Huiping,ZHAO Guoqun,NIU Shanting,et al.Inverse heat conduction analysis of quenching process based on finite element and optimization method[J].Acta Metallrugica Sinica,2005,41(2):167-172.
[17]曹欣,孙志超,杨合.基于DEFORM反传热模型表面换热系数的确定[J].塑性工程学报,2013,20(2):130-135.CAO Xin,SUN Zhichao,YANG He.Determination of surface heat transfer coefficient via inverse heat transfer model based on DEFORM software[J].Journal of Plasticity Engineering,2013,20(2):130-135.
[18]童朝南,高宇德.钢板水冷过程换热系数建模的一种实用方法[J].钢铁,2011,46(7):50-55.TONG Chaonan,GAO Yude.A useful method of building the heat transfer coefficient model in steel cooling process[J].Iron and Steel,2011,46(7):50-55.
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