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Simplified Weighted Velocity Field for Prediction of hot strip rolling Force by Taking into Account Flattening of Rolls

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Journal of Iron and Steel Research International 2014年第7期21卷 637-643页

作者： Dian-hua ZHANG Jian-zhao CAO Jiu-jing XU Wen PENG De-wen ZHAO State Key Laboratory of rolling and Automation Northeastern University

The weighted velocity field was simplified for analysis of hot strip rolling. Using the field and GM （geometric midline） yield criterion, the deformation power, friction power and shear power were obtained respectively. Summing the partial power contributions, the total deformation power for strip rolling was presented. Then, by minimizing the power function, the rolling force was obtained; meanwhile, considering the effect of roll elastic flattening, iterative calculation of the roll radius was carried out until the radius was convergent. On line data were corn pared with the calculated results to verify the model accuracy. It was indicated that the calculated rolling forces were basically in agreement with the measured ones since the maximum error was less than 10.0%. Moreover, the effects of various rolling conditions such as thickness reduction, friction factor and shape factor, upon separating force, location of neutral angle, and stress state coefficient were discussed systematically.

关键词： hot strip rolling rolling force simplified weighted velocity field GM yield criterion elastic flattening analytical solution

Prediction of rolling Load, Recrystallization Kinetics, and Microstructure During hot strip rolling

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Journal of Iron and Steel Research International 2007年第6期14卷 42-46页

作者： XU Yun-bo YU Yong mei LIU Xiang-hua WANG Guo-dong State Key Laboratory of rolling and Automation Northeastern University Shenyang 110004 Liaoning China

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.

关键词： hot strip rolling recrystallization mean flow stress strain accumulation grain size

Effect of Load Distribution on strip Crown in hot strip rolling

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Journal of Materials Science & Technology 2004年第3期20卷 330-334页

作者： HongshuangDI JianzhongXU DianyaoGONG XianghuaLIU GuodongWANG XiaomingHE LiyingBA StateKeyLaboratoryofrollingandAutomation NortheasternUniversityP.O.Box105Shenyang110004China hotstriprollingGroupofBAOSTEEL Shanghai201900China

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.

关键词： hot strip rolling Four-high mill Affecting function Load distributionv Crown control

Designing of hot strip rolling Mill Control System

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World Journal of Engineering and Technology 2016年第3期4卷 413-417页

作者： Yajun Wu School of Application Technology University of Science and Technology Liaoning Anshan China

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.

关键词： hot strip rolling Coiler Tension Control

Development and future prospect of hot strip rolling technology at Baosteel

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维普期刊数据库

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Baosteel Technical Research 2008年第3期2卷 38-48页

作者： Huang Chuanqing Zhang Wenxue hot strip rolling Plant Baosteel Branch Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China

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.

关键词： hot strip rolling pipeline steel 05 steel sheet tinned sheet container steel sheet Si steel

Development and Application of Process Modeling Technology for 2050 hot strip rolling Mill at Baosteel

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Development and Application of Process Modeling Technology f...

Off-line Simulation of PFC for hot rolling strip

技术创新与循环经济——第二届宝钢学术年会

作者： LIU Zhengdong~1,TANG Guangbo~1,CHENG Jiefeng~1,GAN Yong~1,WANG Wei~2,ZHANG Pijun~2 (1.ISM,Central Iron and Steel Research Institute,Beijing 100081,China 2.Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China)

＜正＞An integrated process modeling system had been built,in which thermal,mechanical and metallurgical processes during hot strip rolling were numerically coupled *** structure of the process models was briefly introduced in this *** developed process models can be used to simulate the thermal, mechanical and metallurgical processes evolutions of the whole hot rolling process,from reheating furnace to cooling after coiling,and to predict the mechanical properties of the final product of the 2050 hot strip rolling mill at *** system was verified and optimized against more than 1000 industrial coils of about 10 steel grades and runs on - line *** difference between predicted and measured temperature and strength is±20℃（on-line） and±21 MPa（off-line） respectively.

关键词： hot strip rolling process modeling microstructure evolution on-line application

来源： cnki会议评论

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cnki会议

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Journal of Materials Science & Technology 2003年第5期19卷 502-504页

作者： XiangvceiKONG HezhouYE JianzhongXU GuodongWANG LiyingBA XiaorningHE StateKeyLaboratoryofrolling&Automation NortheasternUniversityShenyang110004China BaoSteelCo.Ltd Slaanghai20-0941China

In order to improve the quality of the strip for the hot continuous rolling, the high accuracy set-up control must be applied to production. In the paper, we analyze the RFC (profile and flatness control) system and simulate the set-up process. Calculation results are in agreement to the actual measurements. It is the basis on the developing model.

关键词： hot strip rolling strip shape PFC CVC mill

Prediction of Mechanical Properties of hot Rolled strip by Using Semi-Parametric Single-Index Model

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Journal of Iron and Steel Research International 2013年第7期20卷 9-15页

作者： ZHAO Yong-hong WENG Yang PENG Ning-qi TANG Guang-bo LIU Zheng-dong College of Mathematics Sichuan University Institute for Structural Materials Central Iron and Steel Research Institute

A semi-parametric single-index model based approach was proposed for prediction of mechanical properties of hot rolled strip. Based on industrial production data, a semi-parametric single-index model was developed by choo-sing the appropriate kernel function and window width to predict the yield strength, tensile strength and elongation. When data samples are limited, compared with regression method and neural network method, the prediction results show that the semi-parametric single-index model based method is more adaptive and the prediction performance is superior to those by both regression and neural network methods.

关键词： hot strip rolling mechanical property prediction regression analysis neural network~ semi-parametricsingle-index model

Synthetical Control of AGC/LPC System Based on Neural Networks Internal Model Control

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Journal of University of Science and Technology Beijing 2001年第1期8卷 75-77页

作者： Hu He, Xiaodong Luan, Yikang Sun Information Engineering School, University of Science and Technology Beijing, Beijing 100083, China Information Engineering School Univ. of Sci. and Technology Beijing Beijing 100083 China

One synthetical control method of AGC/LPC system based on intelligence control theory-neural networks internal model control method is presented. Genetic algorithm (GA) is applied to optimize the parameters of the neu... 详细信息

关键词： hot strip rolling AGC looper neural networks internal model control GA