湘钢第二棒材厂轧制工艺优化
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摘要
本论文结合湘潭钢铁公司第二棒材厂的现场生产实际,由于市场需求变化,二棒材厂产品结构也迫切需要转化,要从原来生产中小规格碳钢圆钢转产大规格的低合金钢管坯。这就需要增大坯料尺寸,对二棒厂的Φ800初轧机孔型系统进行开发设计,对初轧机的轧制的规程进行优化,并对精轧机组孔型系统进行优化改进。由于钢种发生变化,通过在THERMECMASTOR-Z热模拟实验机对20CrMnTiH和40CrA钢种进行热模拟实验,并对实验结果进行分析,得出20CrMnTiH和40CrA钢的流动应力模型,利用此模型计算新孔型系统的轧制力能参数,对轧制压力、轧制力矩、电机能力进行校核。
基于对以上研究内容,得到了如下的主要研究结论:
1.通过采集应力-应变曲线数据进行多元非线性回归得到20CrMnTiH和40CrA钢的流动应力数学模型,该数学模型的结构简单,计算精度也较高,可用于实际生产中。
2.开发的两套初轧机孔型系统,能够满足尺寸和钢种的变化,利用上述模型进行轧制压力、轧制力矩、电机载荷校核,旧轧机仍能满足新钢种大坯料的生产。
3..对生产大规格产品进行压下规程优化和配辊,合理安排翻钢道次、提高孔型共用性,将初轧机孔型系统由原意大利设计的四套减到两套,节约了成本并提高了轧机作业率。
4.对Φ800可逆式初轧机的速度制度进行优化,缩短了轧制节奏时间,能够满足连轧机的速度匹配要求。
5.通过轧制实验得出比较合适的宽展系数,优化设计Φ75~Φ90圆钢椭圆成品前孔孔型及Φ140、Φ150圆钢管坯的成品孔型,避免了原系统轧制时的过充满缺陷。
This thesis is based on the Xiangtan Iron and Steel Company the Second Bar factory production actuality, Second Bar factory changed production construction for the changed market demand, they should change from small and middle size carbon round steel to large size low-alloyed steel tube stock. As the size of planchet increased, the original pass system does not suit for producing big bar product, so we optimized the pass system ofΦ800 blooming mill, and improve the finished pass system. Because the type of steel changed, we carried out the thermal simulation experiments in the THERMECMASTOR-Z thermal simulation machine with 20CrMnTiH and 40CrA, and analyzed the experiment results, obtained 20CrMnTiH and the 40CrA flow stress models, then used this model to collate the present rolling physical parameters of optimized pass system, then check rolling force, rolling moment and the motor power.
Based on situation research,we obtained the following main research conclusions:
1. Through the multi-dimensional non-linear return for stress-strain curve data, we obtained the flow stress mathematical models of 20CrMnTiH and 40CrA. These models are of simple structure and high precision in calculation and can be used in practical production.
2. The two set of blooming pass system are able to meet the change of size and type of steel. Check rolling force, rolling moment and the motor power with this model, discovered the old rolling mill still could satisfy the new type of steels’production.
3. Designed force down rules and match rollers for large size production, arranged pass reasonably, reinforced pass joint use, we reduce the blooming pass system designed by Italy from four sets to two sets, reduced the cost and increased the efficiency of rolling machine.
4. Optimized the speed rules for theΦ800 blooming rolling mill, cut down the rolling time, and matched to the continuous rolling speed.
5. We carried out the hot continuous rolling experiment to obtain appropriate broadside, then succeeded in designingΦ75~Φ90 round steel ellipse pass before finished pass andΦ140、Φ150 round tube stock finished pass, solve the overfill problem in the old pass system.
基于对以上研究内容,得到了如下的主要研究结论:
1.通过采集应力-应变曲线数据进行多元非线性回归得到20CrMnTiH和40CrA钢的流动应力数学模型,该数学模型的结构简单,计算精度也较高,可用于实际生产中。
2.开发的两套初轧机孔型系统,能够满足尺寸和钢种的变化,利用上述模型进行轧制压力、轧制力矩、电机载荷校核,旧轧机仍能满足新钢种大坯料的生产。
3..对生产大规格产品进行压下规程优化和配辊,合理安排翻钢道次、提高孔型共用性,将初轧机孔型系统由原意大利设计的四套减到两套,节约了成本并提高了轧机作业率。
4.对Φ800可逆式初轧机的速度制度进行优化,缩短了轧制节奏时间,能够满足连轧机的速度匹配要求。
5.通过轧制实验得出比较合适的宽展系数,优化设计Φ75~Φ90圆钢椭圆成品前孔孔型及Φ140、Φ150圆钢管坯的成品孔型,避免了原系统轧制时的过充满缺陷。
This thesis is based on the Xiangtan Iron and Steel Company the Second Bar factory production actuality, Second Bar factory changed production construction for the changed market demand, they should change from small and middle size carbon round steel to large size low-alloyed steel tube stock. As the size of planchet increased, the original pass system does not suit for producing big bar product, so we optimized the pass system ofΦ800 blooming mill, and improve the finished pass system. Because the type of steel changed, we carried out the thermal simulation experiments in the THERMECMASTOR-Z thermal simulation machine with 20CrMnTiH and 40CrA, and analyzed the experiment results, obtained 20CrMnTiH and the 40CrA flow stress models, then used this model to collate the present rolling physical parameters of optimized pass system, then check rolling force, rolling moment and the motor power.
Based on situation research,we obtained the following main research conclusions:
1. Through the multi-dimensional non-linear return for stress-strain curve data, we obtained the flow stress mathematical models of 20CrMnTiH and 40CrA. These models are of simple structure and high precision in calculation and can be used in practical production.
2. The two set of blooming pass system are able to meet the change of size and type of steel. Check rolling force, rolling moment and the motor power with this model, discovered the old rolling mill still could satisfy the new type of steels’production.
3. Designed force down rules and match rollers for large size production, arranged pass reasonably, reinforced pass joint use, we reduce the blooming pass system designed by Italy from four sets to two sets, reduced the cost and increased the efficiency of rolling machine.
4. Optimized the speed rules for theΦ800 blooming rolling mill, cut down the rolling time, and matched to the continuous rolling speed.
5. We carried out the hot continuous rolling experiment to obtain appropriate broadside, then succeeded in designingΦ75~Φ90 round steel ellipse pass before finished pass andΦ140、Φ150 round tube stock finished pass, solve the overfill problem in the old pass system.
引文
[1] 王作运,张马林.湘钢二棒厂轧制生产线技术改造[J].湖南冶金,2004(5):13-16
[2] Xiaojun Zhu.Nature of large(Ti,Nb)(C,N)particles precipitated during the solidification of Ti, Nb HSLA steel[J].Journal of University of Science and Technology Beijing,2007,14(2):112
[3] M.Diahazi, X.L.He, J.J.Jonas. Nb(CN) Precipitation and Austenite Recrystallization in Boron-Containing High-Strength Low-Alloy Steels[J].Metal Trans,1992(23):2013.
[4] I. B. Timokhina, A. I. Nosenkov, A. O. Humphreys. Effect of alloying elements on the microstructure and texture of warm rolled steels[J].ISIJ International,2004,44(4):717-724
[5] 范长刚,董翰,雍歧龙等.低合金超高强度钢的研究进展[J].机械工程材料,2006, 30(8):1-4
[6] 张朝生,张志勤.日本节能型钢材的开发[J].钢铁,1997(9):72~75
[7] 王剑志,赵长华,易健.40Cr、20CrMnTi 力学性能及淬透性研究[J].特钢技术 2004(4):1-4
[8] 叶晓瑜.非调质钢在油井管中的发展[J].金属世界,2007(06)
[9] 任海鹏,马洪悌,刘春明等.非调质油井管钢的开发应用[J].钢铁,2002(01)
[10] 武祥斌.20CrMnTiH 的研制与开发[J].江苏冶金,2005, 33(1):32-34
[11] 牛士珍.40Cr 棒材力学性能研究[J].河北冶金,2006(01):25-27
[12] 解振林.非调质钢的研究、应用及其最新进展[J]. 河北理工学院学报,2002(02)
[13] K. F. Kennedy, T. Altan. Computer-aided analysis of metal flow stresses and roll pass design in rod rolling[J].Iron and Steel Engineer,1983 (6):50-53
[14] 刘相华,胡贤磊,杜林秀等.轧制参数计算模型及其应用[M].北京:化学工业出版社
[15] 张云祥,赵嘉蓉,魏钢城等.计算流动应力的一种生产统计模型[J] .钢铁.2005.5
[16] H.S.Kim,YT.Im.A study on automation of roll pass and roll profile design in shape rolling[J].Proceeding of the Second Symposium on Rolling,1997:607-627
[17] Y.L. Tian, H.J. Zou W.Z. Guo.An integrated knowledge representation model for the computer-aided conceptual design of mechanism[J]. The International Journal of Advanced Manufacturing Technology, 2006,28(5-6)
[18] 许云祥.型钢孔型设计[M]. 北京:冶金工业出版社,1993
[19] R. Ebrahimi, S. H. Zahiri, A. Najafizadeh. Mathematical modeling of the stress-strain curves of Ti-IF at high temperature[J].Journal of Materials Processing Technology,2006,171(22):301-305
[20] WANG Ling-yun, FAN Yong-ge. Flow stress and softening behavior of wrought magnesium alloy AZ31B at elevated temperature[J].Trans. Nonferrous Met. Soc. China.2003(4):332-335
[21] 赵松筠,唐文林.型钢孔型设计[M].北京:冶金工业出版社,2000
[22] 程知松.双半径椭圆孔型在大圆钢轧制中的构成方法[J].轧钢,2006(1):60-63
[23] 姜文宝.双圆弧椭圆孔型设计的新方法[J].轧钢,1996(6):47-49
[24] 赵选民.试验设计方法[M].北京:科学出版社,2006
[25] 许永顺,柳建韬,聂明等.金属热变形应力-应变曲线数学模型的研究与应用[J].应用科学学报,1997,15(4):379-384
[26] V.Schulze, O.Vohringer.Influence of alloying elements on the strain rate and temperature dependence of the flow stress of steel[J]. Metallurgical and Materials Transactions A,2000 31(3)
[27] 宋维锡.金属学[M].北京:冶金工业出版社,1989
[28] 杨慧.20CrMnTi 钢的温热变形行为及其数学建模[J].上海交通大学学报,2005(11)
[29] 任福臻.轧制力能参数的计算[J].有色金属加工,1993(6)
[30] M.R. Barnett , J.J. Jonas. Distinctive Aspects of the Physical Metallurgy of warm Rolling[J].ISLJ International,1999 (9):856-873
[31] V. E. Ignatenko, A. I. Marshakov, V. A. Marichev, Yu. N. Mikhailovskii.Effect of cathodic polarization on the corrosion cracking rate in pipe steel[J].Protection of Metals, 2000,36(2)
[32] C. L. Perofi, N. Kapaj. Roll pass design for round pass[J].Ann.CIRP1990,39(3):283-286
[33] Shivpuri R, Shin W.A Methodology for Roll Pass Optimization for Multi-pass Rolling Shape[J] .Int. J. Mach. Tools Shape, Int. J. Mach. Tools Manufacture. ,1992 , 32 (5):671-685
[34] T Lguchi, D R J Owen, G Qliu. An Analysis of Rolling Processes by Dynamic Explicit Method[J].Proc. Of the 7th international conference on steel rolling, 1998:266-271
[35] 山口クガ.Application of computer-aided roll pass design for bar rolling.神户特钢技报,1988,35(2):41
[36] Jahazi M, Egbali R. The influence of hot rolling parameters on the microstructure and mechanical properties of an ultrahigh strength steel[J].Journal of Materials Processing Technology,2000,103(2),276-279
[37] H.C.Kwon, YTIm. Interactive computer-aided-design system for roll pass and profile design in bar rolling[J].Journal of Materials Processing Technology,2002,12(3):399-402
[38] 斋藤好弘,于松.在棒材轧制中方-椭圆,方-菱、圆-椭圆孔型系的宽展和延伸的计算法[J].冶金丛刊,1991(2):29-39
[39] 周晓冬.双圆弧椭圆孔型设计新方法[J].江苏冶金,2006(10):22-23
[40] 王廷溥.轧钢工艺学[M].北京:冶金工艺出版社,1989
[2] Xiaojun Zhu.Nature of large(Ti,Nb)(C,N)particles precipitated during the solidification of Ti, Nb HSLA steel[J].Journal of University of Science and Technology Beijing,2007,14(2):112
[3] M.Diahazi, X.L.He, J.J.Jonas. Nb(CN) Precipitation and Austenite Recrystallization in Boron-Containing High-Strength Low-Alloy Steels[J].Metal Trans,1992(23):2013.
[4] I. B. Timokhina, A. I. Nosenkov, A. O. Humphreys. Effect of alloying elements on the microstructure and texture of warm rolled steels[J].ISIJ International,2004,44(4):717-724
[5] 范长刚,董翰,雍歧龙等.低合金超高强度钢的研究进展[J].机械工程材料,2006, 30(8):1-4
[6] 张朝生,张志勤.日本节能型钢材的开发[J].钢铁,1997(9):72~75
[7] 王剑志,赵长华,易健.40Cr、20CrMnTi 力学性能及淬透性研究[J].特钢技术 2004(4):1-4
[8] 叶晓瑜.非调质钢在油井管中的发展[J].金属世界,2007(06)
[9] 任海鹏,马洪悌,刘春明等.非调质油井管钢的开发应用[J].钢铁,2002(01)
[10] 武祥斌.20CrMnTiH 的研制与开发[J].江苏冶金,2005, 33(1):32-34
[11] 牛士珍.40Cr 棒材力学性能研究[J].河北冶金,2006(01):25-27
[12] 解振林.非调质钢的研究、应用及其最新进展[J]. 河北理工学院学报,2002(02)
[13] K. F. Kennedy, T. Altan. Computer-aided analysis of metal flow stresses and roll pass design in rod rolling[J].Iron and Steel Engineer,1983 (6):50-53
[14] 刘相华,胡贤磊,杜林秀等.轧制参数计算模型及其应用[M].北京:化学工业出版社
[15] 张云祥,赵嘉蓉,魏钢城等.计算流动应力的一种生产统计模型[J] .钢铁.2005.5
[16] H.S.Kim,YT.Im.A study on automation of roll pass and roll profile design in shape rolling[J].Proceeding of the Second Symposium on Rolling,1997:607-627
[17] Y.L. Tian, H.J. Zou W.Z. Guo.An integrated knowledge representation model for the computer-aided conceptual design of mechanism[J]. The International Journal of Advanced Manufacturing Technology, 2006,28(5-6)
[18] 许云祥.型钢孔型设计[M]. 北京:冶金工业出版社,1993
[19] R. Ebrahimi, S. H. Zahiri, A. Najafizadeh. Mathematical modeling of the stress-strain curves of Ti-IF at high temperature[J].Journal of Materials Processing Technology,2006,171(22):301-305
[20] WANG Ling-yun, FAN Yong-ge. Flow stress and softening behavior of wrought magnesium alloy AZ31B at elevated temperature[J].Trans. Nonferrous Met. Soc. China.2003(4):332-335
[21] 赵松筠,唐文林.型钢孔型设计[M].北京:冶金工业出版社,2000
[22] 程知松.双半径椭圆孔型在大圆钢轧制中的构成方法[J].轧钢,2006(1):60-63
[23] 姜文宝.双圆弧椭圆孔型设计的新方法[J].轧钢,1996(6):47-49
[24] 赵选民.试验设计方法[M].北京:科学出版社,2006
[25] 许永顺,柳建韬,聂明等.金属热变形应力-应变曲线数学模型的研究与应用[J].应用科学学报,1997,15(4):379-384
[26] V.Schulze, O.Vohringer.Influence of alloying elements on the strain rate and temperature dependence of the flow stress of steel[J]. Metallurgical and Materials Transactions A,2000 31(3)
[27] 宋维锡.金属学[M].北京:冶金工业出版社,1989
[28] 杨慧.20CrMnTi 钢的温热变形行为及其数学建模[J].上海交通大学学报,2005(11)
[29] 任福臻.轧制力能参数的计算[J].有色金属加工,1993(6)
[30] M.R. Barnett , J.J. Jonas. Distinctive Aspects of the Physical Metallurgy of warm Rolling[J].ISLJ International,1999 (9):856-873
[31] V. E. Ignatenko, A. I. Marshakov, V. A. Marichev, Yu. N. Mikhailovskii.Effect of cathodic polarization on the corrosion cracking rate in pipe steel[J].Protection of Metals, 2000,36(2)
[32] C. L. Perofi, N. Kapaj. Roll pass design for round pass[J].Ann.CIRP1990,39(3):283-286
[33] Shivpuri R, Shin W.A Methodology for Roll Pass Optimization for Multi-pass Rolling Shape[J] .Int. J. Mach. Tools Shape, Int. J. Mach. Tools Manufacture. ,1992 , 32 (5):671-685
[34] T Lguchi, D R J Owen, G Qliu. An Analysis of Rolling Processes by Dynamic Explicit Method[J].Proc. Of the 7th international conference on steel rolling, 1998:266-271
[35] 山口クガ.Application of computer-aided roll pass design for bar rolling.神户特钢技报,1988,35(2):41
[36] Jahazi M, Egbali R. The influence of hot rolling parameters on the microstructure and mechanical properties of an ultrahigh strength steel[J].Journal of Materials Processing Technology,2000,103(2),276-279
[37] H.C.Kwon, YTIm. Interactive computer-aided-design system for roll pass and profile design in bar rolling[J].Journal of Materials Processing Technology,2002,12(3):399-402
[38] 斋藤好弘,于松.在棒材轧制中方-椭圆,方-菱、圆-椭圆孔型系的宽展和延伸的计算法[J].冶金丛刊,1991(2):29-39
[39] 周晓冬.双圆弧椭圆孔型设计新方法[J].江苏冶金,2006(10):22-23
[40] 王廷溥.轧钢工艺学[M].北京:冶金工艺出版社,1989