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Numerical Simulation of Temperature Field and Thermal Stress Field of Work Roll During Hot Strip Rolling 被引量:13
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作者 LI Chang-sheng YU Hai-liang DENG Guan-yu LIU Xiang-hua WANG Guo-dong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第5期18-21,共4页
Based on the thermal conduction equations, the three-dimensional (3D) temperature field of a work roll was investigated using finite element method (FEM). The variations in the surface temperature of the work roll... Based on the thermal conduction equations, the three-dimensional (3D) temperature field of a work roll was investigated using finite element method (FEM). The variations in the surface temperature of the work roll during hot strip rolling were described, and the thermal stress field of the work roll was also analyzed. The results showed that the highest roll surface temperature is 593 ℃, and the difference between the minimum and maximum values of thermal stress of the work roll surface is 145.7 MPa. Furthermore, the results of this analysis indicate that temperature and thermal stress are useful parameters for the investigation of roll thermal fatigue and also for improving the quality of strip during rolling. 展开更多
关键词 hot strip mill ROLL temperature field thermal stress finite element method
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PROFILE AND FLATNESS CONTROL SYSTEM IN 1700mm HOT STRIP MILLS OF ANSTEEL 被引量:6
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作者 HE Anrui YANG Quan +1 位作者 CHEN Xianlin ZHAO Lin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第3期103-107,共5页
Varying contact-length backup roll and linearly variable crown work roll are provided for improving the mill performance of profile and flatness control. Integrated with theses technologies, relevant profile and flatn... Varying contact-length backup roll and linearly variable crown work roll are provided for improving the mill performance of profile and flatness control. Integrated with theses technologies, relevant profile and flatness control models are developed for hot strip mills on the basis of large amount of finite element calculation. These models include shape setup control model in process control system, bending force feedforward control model, crown feedback control model and flatness feedback control model in basis automation system. Such a profile and flatness control system with full functions is applied in 1 700 mm industrial hot strip mills of Ansteel. Large amount of production data shows that the crown precision with the tolerance of±18 μm is over 90%, the strip percentage which the actual flatness is within ±25 I-unit surpasses 96%, and general roll consume is reduced by 28% by using the profile and fiatness control system. In addition, schedule-free rolling is realized. 展开更多
关键词 hot strip mills Profile and flamess control Roll contour Schedule-free rolling
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Advanced run-out table cooling technology based on ultra fast cooling and laminar cooling in hot strip mill 被引量:8
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作者 刘恩洋 彭良贵 +3 位作者 袁国 王昭东 张殿华 王国栋 《Journal of Central South University》 SCIE EI CAS 2012年第5期1341-1345,共5页
In order to meet the severe requirements of market and reduce production costs of high quality steels,advanced run-out table cooling based on ultra fast cooling(UFC) and laminar cooling(LC) was proposed and applied to... In order to meet the severe requirements of market and reduce production costs of high quality steels,advanced run-out table cooling based on ultra fast cooling(UFC) and laminar cooling(LC) was proposed and applied to industrial production.Cooling mechanism of UFC and LC was introduced first,and then the control system and control models were described.By using UFC and LC,low-cost Q345B strips had been produced in a large scale,and industrial trials of producing low-cost dual phase strips were completed successfully.Application results show that the ultra fast cooling is uniform along the strip width and length,and does not affect the flatness of strips.The run-out table cooling system runs stably with a high precision,and makes it possible for the user to develop more high quality steels with low costs. 展开更多
关键词 hot strip mill ultra fast cooling laminar cooling run-out table cooling control model control system
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Remaining Useful Life Prediction for a Roller in a Hot Strip Mill Based on Deep Recurrent Neural Networks 被引量:10
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作者 Ruihua Jiao Kaixiang Peng Jie Dong 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2021年第7期1345-1354,共10页
Accurate estimation of the remaining useful life(RUL)and health state for rollers is of great significance to hot rolling production.It can provide decision support for roller management so as to improve the productiv... Accurate estimation of the remaining useful life(RUL)and health state for rollers is of great significance to hot rolling production.It can provide decision support for roller management so as to improve the productivity of the hot rolling process.In addition,the RUL prediction for rollers is helpful in transitioning from the current regular maintenance strategy to conditional-based maintenance.Therefore,a new method that can extract coarse-grained and fine-grained features from batch data to predict the RUL of the rollers is proposed in this paper.Firstly,a new deep learning network architecture based on recurrent neural networks that can make full use of the extracted coarsegrained fine-grained features to estimate the heath indicator(HI)is developed,where the HI is able to indicate the health state of the roller.Following that,a state-space model is constructed to describe the HI,and the probabilistic distribution of RUL can be estimated by extrapolating the HI degradation model to a predefined failure threshold.Finally,application to a hot strip mill is given to verify the effectiveness of the proposed methods using data collected from an industrial site,and the relatively low RMSE and MAE values demonstrate its advantages compared with some other popular deep learning methods. 展开更多
关键词 hot strip mill prognostics and health management(PHM) recurrent neural network(RNN) remaining useful life(RUL) roller management.
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Quantitative analysis on strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP technique 被引量:8
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作者 HaoYu YonglinKang +4 位作者 XueyingXiong KeluWang JieFu GuijiangChen LiejunLi 《Journal of University of Science and Technology Beijing》 CSCD 2004年第5期425-427,共3页
Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-t... Based on experimental data of positron annihilation technology, electrolyticdissolution technique, electron back-scattered pattern, etc. and by analysis the strengtheningfactors, the strengthening mechanism of ultra-thin hot strip of low carbon steel produced by CSP(Compact Strip Production) technique was investigated. The value of each strengthening mechanism andits contribution percentage to yield strength were achieved. The results show that refinementstrengthening is the predominant strengthening mode; precipitation strengthening and dislocationstrengthening are second to it, their contributions to yield strength are almost equal. 展开更多
关键词 CSP positron annihilation technology electrolytic dissolution technique electron back-scattered pattern strengthening mechanism hot strip
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Analysis of the thermal profile of work rolls in the hot strip rolling process 被引量:7
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作者 XuanliZhang JieZhang +2 位作者 XiaoyanLi HaixiaLi GangchengWei 《Journal of University of Science and Technology Beijing》 CSCD 2004年第2期173-177,共5页
A 2-dimension axisymmetric model was developed by the finite-differencemethod, which can be used to predict the transient temperature field and thermal profile of workrolls in the hot strip rolling process. To demonst... A 2-dimension axisymmetric model was developed by the finite-differencemethod, which can be used to predict the transient temperature field and thermal profile of workrolls in the hot strip rolling process. To demonstrate the accuracy and reliability of the solutiondeveloped, the calculation results were compared with the production data of a 1700 mm hot striprolling mill and good agreement was found between them. The effect of strip width and roll shiftingon the thermal expansion of the work rolls was studied. It is found that the strip width has markedeffect on the efficient thermal crown. Initially, when the rolling strip changes from narrow towide, a bigger efficient thermal crown can be quickly achieved; afterwards, when the rolling stripchanges from wide to narrow, not only the influence of uneven wear can be reduced but also theexcessive efficient thermal crown can be avoided. It is also found that the work roll shifting has adeterminate but not obvious effect on the reduction of the efficient thermal crown, and will makethe strip shape unstable without being used properly. 展开更多
关键词 hot strip rolling temperature field thermal crown finite-difference method
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Prediction of Rolling Load in Hot Strip Mill byInnovations Feedback Neural Networks 被引量:3
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作者 ZHANG Li ZHANG Li-yong +1 位作者 WANG Jun MA Fu-ting 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第2期42-45,51,共5页
Because the structure of the classical mathematical model of rolling load is simple, even with the self-adapting technology, it is difficult to accommodate the increasing dimensional accuracy. Motivated by this fact, ... Because the structure of the classical mathematical model of rolling load is simple, even with the self-adapting technology, it is difficult to accommodate the increasing dimensional accuracy. Motivated by this fact, an Innovations Feedback Neural Networks (IFNN) was presented based on the idea of Kalman prediction. The neural networks used the Back Propagation (BP) algorithm and applied it to the prediction of rolling load in hot strip mill. The theoretical results and the off-line simulation show that the prediction capability of IFNN is better than that of normal BP networks, namely, for the prediction of the rolling load in hot strip mill, the prediction precision of IFNN is higher than that of normal BP networks. Finally, a relative complete rolling load prediction system was developed on Windows 2003/XP platform using the OOP programming method and the SQL server2000 database. With this sys- tem, the rolling load of a 1700 strip mill was calculated, and the prediction results obtained correspond well with the field data. It shows that IFNN is valid for rolling load prediction. 展开更多
关键词 rolling load prediction INNOVATION neural network hot strip mill
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Element Tracking Strategies for Hot Strip Laminar Cooling Control 被引量:3
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作者 HANBin ZHANGZhong-ping +1 位作者 LIUXiang-hua WANGGuo-dong 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2005年第3期18-21,27,共5页
Feedforward control is the core to control function in the cooling process of hot strip. One of the most important tasks in feedforward control is to determine the arrival time of the strip at various locations on the... Feedforward control is the core to control function in the cooling process of hot strip. One of the most important tasks in feedforward control is to determine the arrival time of the strip at various locations on the runout table for effective control. Based on the principles of element tracking and tracking strategies for variable rolling speed and constant rolling speed, a simple diagonal tracking method for an existing hot strip mill was proposed and tested. The test results show that the proposed strategies are effective for improving tracking control. 展开更多
关键词 laminar cooling hot strip element tracking coiling temperature control
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Application of Cooling Water in Controlled Runout Table Cooling on Hot Strip Mill 被引量:2
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作者 LIUZheng-dong IVSamarasekera 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2004年第3期15-23,共9页
The controlled runout table cooling is essential in determining the final mechanical properties and flatness of steel strip.The heat of a hot steel strip is mainly extracted by cooling water during runout.In order to ... The controlled runout table cooling is essential in determining the final mechanical properties and flatness of steel strip.The heat of a hot steel strip is mainly extracted by cooling water during runout.In order to study the heat transfer by water jet impingement boiling during runout,apilot facility was constructed at the University of British Columbia.On this pilot facility,the water jet impingement tests were carried out under various cooling conditions to investigate the effect of processing parameters,such as cooling water temperature,water jet impingement velocity,initial strip temperature,water flow rate,water nozzle diameter and array of water nozzles,on the heat transfer of heated strip.The results obtained contribute to the optimization of cooling water during runout. 展开更多
关键词 cooling water controlled runout table hot strip mill
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Multi-objective optimization for draft scheduling of hot strip mill 被引量:2
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作者 李维刚 刘相华 郭朝晖 《Journal of Central South University》 SCIE EI CAS 2012年第11期3069-3078,共10页
A multi-objective optimization model for draft scheduling of hot strip mill was presented, rolling power minimizing, rolling force ratio distribution and good strip shape as the objective functions. A multi-objective ... A multi-objective optimization model for draft scheduling of hot strip mill was presented, rolling power minimizing, rolling force ratio distribution and good strip shape as the objective functions. A multi-objective differential evolution algorithm based on decomposition (MODE/D). The two-objective and three-objective optimization experiments were performed respectively to demonstrate the optimal solutions of trade-off. The simulation results show that MODE/D can obtain a good Pareto-optimal front, which suggests a series of alternative solutions to draft scheduling. The extreme Pareto solutions are found feasible and the centres of the Pareto fronts give a good compromise. The conflict exists between each two ones of three objectives. The final optimal solution is selected from the Pareto-optimal front by the importance of objectives, and it can achieve a better performance in all objective dimensions than the empirical solutions. Finally, the practical application cases confirm the feasibility of the multi-objective approach, and the optimal solutions can gain a better rolling stability than the empirical solutions, and strip flatness decreases from (0± 63) IU to (0±45) IU in industrial production. 展开更多
关键词 hot strip mill draft scheduling multi-objective optimization multi-objective differential evolution algorithm based ondecomposition (MODE/D) Pareto-optimal front
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Complete Mill Simulation of the Rolling Process of 1660 mm Hot Strip Continuous Mills 被引量:1
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作者 YingruiWANG ZhenshanCUI +1 位作者 YingjieWANG HongminLIU 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第6期649-656,共8页
The three-dimensional plastic deformations of strip are analyzed using the stream surface strip element method, the elastic deformations of rolls are analyzed using the influence coefficient method, the analyzing and ... The three-dimensional plastic deformations of strip are analyzed using the stream surface strip element method, the elastic deformations of rolls are analyzed using the influence coefficient method, the analyzing and computing model of shape and crown of 4-high mill was established by combining them, and the rolling process of 1660 mm hot strip continuous mills was simulated. The simulated results tally well with the experimental results. The modei and the method for simulation of shape analysis and control of hot strip mills were provided. 展开更多
关键词 hot strip mill Stream surface strip element method Shape CROWN Unit rolling pressure SIMULATION
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Effect of Load Distribution on Strip Crown in Hot Strip Rolling 被引量:1
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作者 HongshuangDI JianzhongXU +4 位作者 DianyaoGONG XianghuaLIU GuodongWANG XiaomingHE LiyingBA 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第3期330-334,共5页
In order to establish precision model, a software to calculate the strip crown of four-high hot rolling mill was developedby using affecting function method according to the strip crown calculation theory. The effect ... In order to establish precision model, a software to calculate the strip crown of four-high hot rolling mill was developedby using affecting function method according to the strip crown calculation theory. The effect of work roll diameter,unit width rolling load, roll bending force, work roll crown, initial strip crown and reduction, etc, on load distributioneffect rate was simulated by using the software. The results show that the load distribution effect rate increaseswith the increase of strip width, work roll diameter, unit width rolling load, roll bending force, work roll crown,initial strip crown and reduction. Based on the simulation results, base value of load distribution effect rate andfitting coefficients of six power polynomial of load distribution effect rate modification coefficient were determinedconsidering all of the above parameters. A simplified mathematical model for calculating load distribution effect ratewas established. 展开更多
关键词 hot strip rolling Four-high mill Affecting function Load distributionv Crown control
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Prediction of Rolling Load, Recrystallization Kinetics, and Microstructure During Hot Strip Rolling 被引量:1
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作者 XU Yun-bo YU Yong mei LIU Xiang-hua WANG Guo-dong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第6期42-46,共5页
The recrystallization kinetics and grain size models were developed for the C Mn and niobium containing steels to describe the metallurgical phenomenon such as softening, grain growth, and strain accumulation. Based o... The recrystallization kinetics and grain size models were developed for the C Mn and niobium containing steels to describe the metallurgical phenomenon such as softening, grain growth, and strain accumulation. Based on the recrystallization kinetics equations, the mean flow stress and the rolling load of each pass were predicted and the optimum rolling schedule was proposed for hot strip rolling. The austenite grain refinement is associated with the addition of niobium, the decrease of starting temperature of finish rolling, and the reduction of finished thickness. The mean flow stress curve with a continuous rising characteristic can be usually observed in the finish rolling of niobium containing steel, which is formed as a result of the heavy incomplete softening and strain accumulation. The predic ted rolling loads are in good agreement with the measured ones. 展开更多
关键词 hot strip rolling RECRYSTALLIZATION mean flow stress strain accumulation grain size
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Influence of copper on quality of hot strips by EAF-CSP process
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作者 WANG Yuanli, LIU Delu, SHAO Weiran, FU Jie, KANG Yonglin, ZHOU Deguang, and WANG Zhongbing 《Rare Metals》 SCIE EI CAS CSCD 2004年第1期63-63,共1页
Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study on influence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has been carried out. The results indicated that... Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study on influence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has been carried out. The results indicated that copper segregation and enrichment at interfacial layer between oxidized surface and steel matrix is the key factor, which results in microcracks and edge flaws on the strips. The primary considerations to prevent detrimental effects from Cu include controlling copper content in proper level, higher soaking temperature and non-oxidizable atmosphere during soaking. Copper sulfide precipitates with nanometers in size were observed, they may be beneficial to the properties of CSP products, and influence of Cu on quality of CSP hot strips is discussed. 展开更多
关键词 Cu segregation surface flaws CSP hot strips copper sulfide nano-scaled precipitates
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Shape Setup System for 1700 Hot Strip Mill
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作者 GUO Zhong-feng XU Jian-zhong LI Chang-sheng LIU Xiang-hua 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第5期27-30,共4页
Shape setup (SSU) system is the core technology for hot strip mill (HSM). A precise SSU system was used to improve the strip quality for HSM. The function of SSU, setup, and feedback was introduced. The main mathe... Shape setup (SSU) system is the core technology for hot strip mill (HSM). A precise SSU system was used to improve the strip quality for HSM. The function of SSU, setup, and feedback was introduced. The main mathematical models of roll gap profile and longitudinal strain difference are set up. Strip profile allocation strategy was researched according to the SSU system of a domestic 1 700 mm HSM. The SSU system was put into practical use and the measurement results showed that strip flatness variation and strip profile variation could be controlled in target scope. 展开更多
关键词 SSU hot strip mill shape strip profile FLATNESS
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Development and future prospect of hot strip rolling technology at Baosteel
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作者 Huang Chuanqing Zhang Wenxue 《Baosteel Technical Research》 CAS 2008年第3期38-48,共11页
Since the 2050 mm hot strip mill was put into operation in 1989, Baosteel has made great achievements in increasing productivity, developing new process technologies and steel products and improving product quality. I... Since the 2050 mm hot strip mill was put into operation in 1989, Baosteel has made great achievements in increasing productivity, developing new process technologies and steel products and improving product quality. In the past 18 years from 1989 to 2007 ,Baosteel has constructed five hot strip mills with a total annual capacity of 19.8 Mt. Indices for technology standards, product categories and steel grades, product quality, both technically and economically, take the lead domestically or reached the world class level. As there are many hot strip mills that expected to be put into operation by the end of 2010 ,the overall annual capacity will exceed 30 Mt ,and the product will cover grain oriented (GO) Si steels and alloyed steels. 展开更多
关键词 hot strip rolling pipeline steel 05 steel sheet tinned sheet container steel sheet Si steel
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Analysis of the change of roll thermal crown in 1750 mm hot strip mill
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作者 MA Zhanfu~(1)),LI Ziwen~(2)) and ZHAO Xicheng~(1)) 1) Xi’ an University of Architecture and Technology,Xian 710055 Shanxi,China 2) Xinijang Bayi Iron &steel Co.,Ltd.,Wulumuqi 830022,Xinjiang,China 《Baosteel Technical Research》 CAS 2010年第S1期34-,共1页
Studied the distributing of roll temperature and the change rule of thermal crown in 1 750 hot strip mill,the result of the test showed that the change of roll thermal crown was affected by the condition of roll cooli... Studied the distributing of roll temperature and the change rule of thermal crown in 1 750 hot strip mill,the result of the test showed that the change of roll thermal crown was affected by the condition of roll cooling and equipmentthe roll thermal crown was obviously improved after altering the pipe and water nib of cooling equipment.From the rule of roll thermal crown changing with the number of strip rolling know that the thermal crown of work roll of Standi is the largest,and Stand 6 is the smallest one in a period of rolling. 展开更多
关键词 hot strip mill ROLL roll cooling thermal crown
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Influence of copper on quality of hot strips by EAF-CSP process
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作者 YuanliWang DeluLiu +4 位作者 WeiranShao JieFu YonglinKang DeguangZhou ZhongbingWang 《Journal of University of Science and Technology Beijing》 CSCD 2004年第1期57-61,共5页
Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study oninfluence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has beencarried out. The results indicated that c... Electron microscopy and X-ray Energy Dispersive Spectroscopy (XEDS) study oninfluence of Cu on low carbon hot strips produced by CSP (Compact Strip Production) process has beencarried out. The results indicated that copper segregation and enrichment at interfacial layerbetween oxidized surface and steel matrix is the key factor, which results in microcracks and edgeflaws on the strips. The primary considerations to prevent detrimental effects from Cu includecontrolling copper content in proper level, higher soaking temperature and non-oxidizable atmosphereduring soaking. Copper sulfide precipitates with nanometers in size were observed, they may bebeneficial to the properties of CSP products, and influence of Cu on quality of CSP hot strips isdiscussed. 展开更多
关键词 Cu segregation surface flaws CSP hot strips copper sulfide nano-scaledprecipitates
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Computer Simulating Calculation on the Microstructure Evolutions during Hot Strip Rolling of C-Mn Steels
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作者 Zhenyu LIU Guodong WANG and Qiaing ZHANG(Northeastern University, Shenyang, 110006, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第3期221-224,共4页
The program to predict the microstructure evolutions during hot strip rolling of C-M n steels has been developed in this paper, BV using this program, the microstructure changes with the processing parameters were ana... The program to predict the microstructure evolutions during hot strip rolling of C-M n steels has been developed in this paper, BV using this program, the microstructure changes with the processing parameters were analysed in detail. showing not only a good agreement of prediction with the measured values, but also entirely possibility to optimize hot strip rolling precess by computer simulation 展开更多
关键词 MN Computer Simulating Calculation on the Microstructure Evolutions during hot strip Rolling of C-Mn Steels FIGURE
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Designing of Hot Strip Rolling Mill Control System
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作者 Yajun Wu 《World Journal of Engineering and Technology》 2016年第3期413-417,共6页
Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. The arithmetic of coiling tension and the control process is introduced. ... Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. The arithmetic of coiling tension and the control process is introduced. The frame of the tension adjusting system is given. The coiler control system hardware is designed. The system is designed scientifically with steady control and meets demand of the market. 展开更多
关键词 hot strip Rolling COILER Tension Control
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