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Demand of Electric Power and Its Forecasting in Iron and Steel Complex 被引量:1
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作者 ZHOU Dian-min GAO Feng QIAO Wei 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第5期21-24,共4页
A systematic study on the electrical load forecasting for large-scale iron and steel companies was made. After analyzing the electrical load's characteristics, an algorithm framework for the load forecasting in iron ... A systematic study on the electrical load forecasting for large-scale iron and steel companies was made. After analyzing the electrical load's characteristics, an algorithm framework for the load forecasting in iron and steel complex was formulated based on model combination and scheme filtration. The algorithm features data quality self- adaptation, convenient forecasting model extension, easy practical application, etc. , and has been successfully applied in Baoshan Iron and Steel Co Ltd, Shanghai, China, resulting in great economic benefit. 展开更多
关键词 load forecasting steel production model combination scheme filtration
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Effect of silicon and prior deformation of austenite on isothermal transformation in low carbon steels 被引量:2
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作者 Minghui CAI Hua DING +1 位作者 Jiansu ZHANG Long LI 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2009年第2期100-109,共10页
Isothermal transformation (TTT) behavior of the low carbon steels with two Si contents (0.50 wt pct and 1.35 wt pct) was investigated with and without the prior deformation. The results show that Si and the prior ... Isothermal transformation (TTT) behavior of the low carbon steels with two Si contents (0.50 wt pct and 1.35 wt pct) was investigated with and without the prior deformation. The results show that Si and the prior deformation of the austenite have significant effects on the transformation of the ferrite and bainite. The addition of Si refines the ferrite grains, accelerates the polygonal ferrite transformation and the formation of M/A constituents, leading to the improvement of the strength. The ferrite grains formed under the prior deformation of the austenite become more homogeneous and refined. However, the influence of deformation on the tensile strength of both steels is dependent on the isothermal temperatures. Thermodynamic calculation indicates that Si and prior deformation reduce the incubation time of both ferrite and bainite transformation, but the effect is weakened by the decrease of the isothermal temperatures. 展开更多
关键词 Low carbon steel Si content Prior deformation of austenite Ferrite transformation Bainite transformation
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ABSTRACTS——From Journal of Iron and Steel Research(in Chinese)
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作者 YANG Li hong YANG Wen yuan +2 位作者 ZHENG Cong jie CUI Jian JIANG Xiao fang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2002年第2期1-6,共6页
The electrochemical nature of reaction between melt and slag in a closed system was worked out. Experimental results demonstrated that both the rate and reaction extent increase when the electronic conductor or voltag... The electrochemical nature of reaction between melt and slag in a closed system was worked out. Experimental results demonstrated that both the rate and reaction extent increase when the electronic conductor or voltage was applied between melt and slag. The bigger the contact area of the conductor with melts is, the faster the reaction rate is. With the increase of applied voltage which is beneficial for electron's migration between metal and slags, the rate and extent of reaction increase. 展开更多
关键词 metal slag reaction ELECTROCHEMISTRY electronic conduction
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GB/T20887.2-2010 Continuously Hot Rolled High Strength Steel Sheet and Strip for Automobile-Part2:High Hole Expansion Steel
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作者 涂树林 李玉光 +2 位作者 杨渊 孙忠明 黄锦花 《China Standardization》 2013年第5期82-86,共5页
With the increasing requirements for reducing the weight and emission of automobiles, the automobile manufacturers turn to use the high strength steel. Car chassis as an important component has complex shape and is di... With the increasing requirements for reducing the weight and emission of automobiles, the automobile manufacturers turn to use the high strength steel. Car chassis as an important component has complex shape and is difficult to form. As the strength of design steel strength increases from about 400MPa to 590MPa, the steel hole expansion rate becomes a crucial indicator which needs to be over 75%. 展开更多
关键词 高强度钢板 汽车制造商 钢带 GB 热轧 扩孔 排放要求 组成部分
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Improved Relative-transformation Principal Component Analysis Based on Mahalanobis Distance and Its Application for Fault Detection 被引量:8
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作者 SHI Huai-Tao LIU Jian-Chang +4 位作者 XUE Peng ZHANG Ke WU Yu-Hou ZHANG Li-Xiu TAN Shuai 《自动化学报》 EI CSCD 北大核心 2013年第9期1533-1542,共10页
主要部件分析(PCA ) 广泛地在过程工业被使用了,它能维持最大的差错察觉率。尽管许多问题在 PCA 被处理了,一些必要问题仍然保持未解决。这研究以下列方法为差错察觉性能改进 PCA。第一,一个相对转变计划基于 Mahalanobis 距离(MD )... 主要部件分析(PCA ) 广泛地在过程工业被使用了,它能维持最大的差错察觉率。尽管许多问题在 PCA 被处理了,一些必要问题仍然保持未解决。这研究以下列方法为差错察觉性能改进 PCA。第一,一个相对转变计划基于 Mahalanobis 距离(MD ) 被介绍消除数据的尺寸的效果而不是无尺寸的标准化,并且改进精确性和差错察觉的即时性能。理论推导证明那相对转变能直接基于 MD 消除尺寸的效果并且在结果显示出的相对空间,分析和模拟给 PCA 的合理解释它的优势和有效性。第二,一个改进摆平的预言错误(SPE ) 统计数值被给改进标准化 PCA 的差错察觉表演,它能使标准化基于 PCA 的差错察觉方法成为对实际工业过程合适的更多。最后,二个改进方法被联合更有效地检测差错。建议方法被使用在热连续滚动过程检测 looper 系统的单个差错和多差错,模拟结果以易感知,精确性和差错察觉的即时性能为差错察觉性能表明这些改进的有效性。 展开更多
关键词 故障检测率 主成分分析 马氏距离 应用 分析基 转化 故障检测方法 实时性能
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Effects of pre-strain and baking parameters on the microstructure and bake-hardening behavior of dual-phase steel 被引量:3
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作者 Chun-fu Kuang Shen-gen Zhang +2 位作者 Jun Li Jian Wang Hua-fei Liu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第8期766-771,共6页
In a typical process, C-Mn steel was annealed at 800℃ for 180 s, and then cooled rapidly to obtain the ferrite-martensite microstructure. After pre-straining, the specimens were baked and the corresponding bake-harde... In a typical process, C-Mn steel was annealed at 800℃ for 180 s, and then cooled rapidly to obtain the ferrite-martensite microstructure. After pre-straining, the specimens were baked and the corresponding bake-hardening (BH) values were determined as a function of pre-strain, baking temperature, and baking time. The influences ofpre-strain, baking temperature and baking time on the microstructure evolution and bake-hardening behavior of the dual-phase steel were investigated systematically. It was found that the BH value apparently increased with an increase in pre-strain in the range from 0 to 1%; however, increasing pre-strain from 1% to 8% led to a decrease in the BH value. Furthermore, an increase in baking temperature favored a gradual improvement in the BH value because of the formation of Cottrell atmosphere and the precipitation of carbides in both the ferrite and martensite phases. The BH value reached a maximum of 110 MPa at a baking temperature of 300℃. Moreover, the BH value enhanced significantly with increasing baking time from 10 to 100 min. 展开更多
关键词 dual-phase steel PRE-STRAIN baking treatment MICROSTRUCTURE HARDENING
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Influence of rapid heating process on the microstructure and tensile properties of high-strength ferrite–martensite dual-phase steel 被引量:2
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作者 Pei Li Jun Li +2 位作者 Qing-ge Meng Wen-bin Hu Chun-fu Kuang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第9期933-941,共9页
Three low-carbon dual-phase (DP) steels with almost constant martensite contents of 20vo1% were produced by intercritical annealing at different heating rates and soaking temperatures. Microstructures prepared at lo... Three low-carbon dual-phase (DP) steels with almost constant martensite contents of 20vo1% were produced by intercritical annealing at different heating rates and soaking temperatures. Microstructures prepared at low temperature (1043 K, FH1) with fast-heating (300 K/s) show banded ferrite/martensite structure, whereas those soaked at high temperature (1103 K, FH2) with fast heating reveal blocky martensite uniformly distributed in the fine-grained ferrite matrix. Their mechanical properties were tested under tensile conditions and compared to a slow-heated (5 K/s) reference material (SH0). The tensile tests indicate that for a given martensite volume fraction, the yield strength and total elongation values are noticeably affected by the refinement of ferrite grains and the martensite morphology. Metallographic observations reveal the formation of microvoids at the ferrite/martensite interface in the SH0 and FH2 samples, whereas microvoids nucleate via the fracture of banded martensite particles in the FH1 specimen. In addition, analyses of the work-hardening behaviors of the DP microstructures using the differential Crussard-Jaoul technique demonstrate two stages of work hardening for all samples. 展开更多
关键词 high-strength steel MARTENSITE FERRITE HEATING MICROSTRUCTURE tensile properties grain refinement
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Temperature field analysis and its application in hot continuous rolling of Inconel 718 superalloy 被引量:2
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作者 Fengli SUI Liqing CHEN +2 位作者 Xianghua LIU Lintao WANG Wei LI 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2009年第2期81-90,共10页
A coupled thermo-mechanical model containing metal flow and temperature field for calculating temperature variation has been developed on fourteen-pass hot continuous rolling of round rod for Inconel 718 alloy using 3... A coupled thermo-mechanical model containing metal flow and temperature field for calculating temperature variation has been developed on fourteen-pass hot continuous rolling of round rod for Inconel 718 alloy using 3D elastic-plastic finite element method (FEM). The temperature of characteristic analysis points in the intermediate cross-section of the workpiece has been simulated at initial temperature ranging from 960 to 1000 ℃ and initial velocity in range of 0.15-0.55 m·s^-1. Based on finite element analysis and microstructural observation in cylindrical hot compression experiments, the appropriate hot continuous rolling technologies have been designed for rod products with different diameters. For a real rolling practice, the simulated surface temperature was examined and is in good agreement with the measured one. 展开更多
关键词 Hot continuous rolling Elastic-plastic finite element method(FEM) Coupled analysis Temperature field Inconel 718
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High Efficient Technology of Steelmaking With Low Silicon Hot Metal on Large Converter 被引量:2
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作者 JIANG Xiao-fang WANG Ming-lin +3 位作者 YANG Wen-yuan GAN Yong WANG Ying-jun YU Zu-da 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2007年第6期27-31,52,共6页
To resolve the difficulty in slag formation during steelmaking with low silicon hot metal and to increase productivity, a new 5-hole lance was developed by increasing oxygen flow from 50 000 m^3/h to 60 000 m^3/h. Syn... To resolve the difficulty in slag formation during steelmaking with low silicon hot metal and to increase productivity, a new 5-hole lance was developed by increasing oxygen flow from 50 000 m^3/h to 60 000 m^3/h. Synthetic slag was added to adjust the slag composition. The problems such as difficulty in dephosphorization and slag adhesion to oxygen lance and hood were settled. Steel production and metal yield were increased and the nozzle life was prolonged through these techniques. 展开更多
关键词 CONVERTER hot metal low silicon content synthetic slag NOZZLE
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Study on grain refinement of interstitial-free steel during continuous frictional angular extrusion 被引量:1
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作者 YAN Bo HUANG Yan JIAO Sihai 《Baosteel Technical Research》 CAS 2012年第4期55-61,共7页
To explore the application of severe plastic deformation for grain refinement in steel production, a new method called continuous frictional angular extrusion (CFAE) was applied to refine the grain of interstitial-f... To explore the application of severe plastic deformation for grain refinement in steel production, a new method called continuous frictional angular extrusion (CFAE) was applied to refine the grain of interstitial-free steel. The deformation was carried out at room temperature and individual sheet specimens were processed in different number of passes. An overall grain size of 200nm was achieved after 8 passes and the proportion of high-angle boundaries to the total boundaries was more than 60%. Through the characterization of high resolution EBSD, X-ray diffraction (XRD) and hardness testing,this paper discussed the evolution of microstructures and textures during deformation and explored the development direction of the method. 展开更多
关键词 severe plastic deformation continuous frictional angular extrusion (CFAE) interstitial-free steel ultrafine grained structure TEXTURE EBSD XRD
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Wetting between molten iron and prereduced ilmenite with carbon
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作者 王玉明 袁章福 +3 位作者 赵宏欣 熊绍锋 姜伟忠 李肇毅 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第5期924-929,共6页
An interfacial study between molten iron and the prereduced ilmenite with carbon was conducted at different melting temperatures by the sessile droplet method.The wetting characteristics between molten iron and the pr... An interfacial study between molten iron and the prereduced ilmenite with carbon was conducted at different melting temperatures by the sessile droplet method.The wetting characteristics between molten iron and the prereduced ilmenites with carbon were investigated by measuring contact angle of the droplet of molten iron on the prereduced ilmenite substrate.The images of the interface were also examined by the optical microscope and SEM equipped with EDS.The volume of molten iron increased with the melting temperature increasing when titania or high-content titania slag was used as the substrate.The contact angle decreased with the melting temperature increasing and it was independent on time at constant temperature.The contact angle was positively correlated with the reduction degree of the ilmenite,but the work of adhesion was negatively correlated with it.Higher smelting temperature was beneficial to the separation of iron and Ti oxides.The permeability of molten iron into the prereduced ilmenite with carbon was more obvious with reduction degree increasing owing to the high porosity of prereduced ilmenite. 展开更多
关键词 molten iron prereduced ilmenite WETTING interfacial permeability contact angle carbon reduction
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Application of Feedforward and Feedback Control Strategy for Wire Rod Hot Rolling Line
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作者 ZHU Hong-xiang HAO Xiao-hong +3 位作者 WEN Zhia HU Ze-qiang ZHANG Yao-gen CHEN Hu-qiu 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2005年第5期21-23,共3页
The feedforward and feedback control strategy of water flowrate based on the analysis of thermal process in water cooling box was proposed, and the control strategy was applied to wire rod hot rolling at Baosteel Co. ... The feedforward and feedback control strategy of water flowrate based on the analysis of thermal process in water cooling box was proposed, and the control strategy was applied to wire rod hot rolling at Baosteel Co. The operation has proved that the strategy can control water flowrate in the cooling water box reasonably to ensure the temperature requirement of the wire discharged from the cooling water box. 展开更多
关键词 WIRE FEEDFORWARD FEEDBACK controlled cooling
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Simulation and Training Package on Corex Process
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作者 XU Hai-chuan QI Yuan-hong +2 位作者 YAN Ding-liu ZHOU Yu-sheng CAO Chuan-gen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2002年第1期16-18,共3页
The flow behaviors in a gas solid contactor with inclined perforated plates that form a zigzag path were experimentally studied. In this contactor solid particles slide down along the inclined perforated plates by th... The flow behaviors in a gas solid contactor with inclined perforated plates that form a zigzag path were experimentally studied. In this contactor solid particles slide down along the inclined perforated plates by the upflowing gas. This structure, called as 'z path moving bed', has some of the advantages of both moving and fluidized beds. The discharge rate of solid particles, inclination angle of the perforated plate, aperture ratio of the perforated plate, size of particles and gas velocity were chosen as parameters for experimental conditions. The stable operation conditions were certained for the particles and apparatus used. The pressure drop, bed height and residence time distribution of particles were measured versus gas velocity. 展开更多
关键词 z path moving bed gas solid reactor fluidized bed
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Generation reason and corrosion characteristicof cavity of tinplate alloy layer
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作者 黄久贵 李宁 周德瑞 《Journal of Central South University of Technology》 2004年第4期362-366,共5页
The surface morphology of alloy layer of tinplate was studied by means of scanning electron microscopy. By using the layer on layer debonding technology of glow discharge spectrum, the contents of C and O at the bound... The surface morphology of alloy layer of tinplate was studied by means of scanning electron microscopy. By using the layer on layer debonding technology of glow discharge spectrum, the contents of C and O at the boundary of alloy layer and black plate were analyzed. And the corrosion characteristic of cavity of tinplate alloy layer was studied on-line and in-situ by means of electrochemical atomic force microscope. The corrosion depth of cavity of alloy layer in-situ after different corrosion time was measured. The results show that the cavity of alloy layer is a critical factor causing rapid decline of corrosion resistance of tinplate, and the formation of cavity of alloy layer is due to incorrect pretreatment of black plate before electrotinning. The cavity of alloy layer is the internal factor causing pitting corrosion of tinplate when the tinplate is applied to food packaging material. And the dynamic equation of pitting corrosion generated in the cavity of alloy layer conforms to logarithm law. 展开更多
关键词 tinplate alloy layer scanning electron microscopy glow discharge spectrum electrochemical atomic force microscope corrosion resistance
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Study on direct cold rolling of hot rolled austenitic stainless steel SUS 304 with oxide scale
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作者 He Shen Shen Jicheng 《Baosteel Technical Research》 CAS 2008年第1期18-21,共4页
The austenitic stainless steel SUS 304 with oxide scale was directly cold rolled at different reductions of 10%, 20% and 30% respectively. It was proved that the surface quality (lower surface roughness) of the cold... The austenitic stainless steel SUS 304 with oxide scale was directly cold rolled at different reductions of 10%, 20% and 30% respectively. It was proved that the surface quality (lower surface roughness) of the cold rolled products was achieved after subsequent annealing and pickling possesses, compared to the conventional hot rolled No. 1 product, whereas the grain size, mechanical and corrosion-resistant properties were comparable to those of the No. 1 product. 展开更多
关键词 austenitic stainless steel cold rolling oxide scale
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Analysis of Corrosion Behavior of ZrO_(2)-C Slag-line Materials in Continuous Casting
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作者 TIAN Chen ZHI Jianjun +6 位作者 GAN Feifang FAN Zhengjie GAO Hua YUAN Lei LIU Guoqi YU Jingkun LI Hongxia 《China's Refractories》 CAS 2023年第3期10-13,共4页
In view of the service failure and low continuous casting production efficiency due to the corrosion of refractories at the slag-line in submerged entry nozzles,a submerged entry nozzle for low-carbon aluminum killed ... In view of the service failure and low continuous casting production efficiency due to the corrosion of refractories at the slag-line in submerged entry nozzles,a submerged entry nozzle for low-carbon aluminum killed steel continuous casting in one steel plant was sampled and taken as the research object to analyze the causes and the mechanism of refractory corrosion at the slag-line.The results show that the core issue of the corrosion and necking of the slag-line materials is that the slag-line material are eroded,dissolved,and reacted by the mold flux gradually.Therefore,it is important to suppress or avoid the contact and reaction between the mold flux and slag-line materials. 展开更多
关键词 continuous casting submerged entry nozzle slag-line slag corrosion resistance
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Effect of cooling method on TiN precipitation behavior of high-titanium high-strength steel during solidification
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作者 Xue-jian Zhang Guang-wei Yang +4 位作者 Yong Wan Yong-hong Wen Chuan-sheng Tang Ming-qi Liu Li-jie Tian 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第7期1692-1703,共12页
Metallographic microscopy,scanning electron microscopy and TiN growth thermodynamic and kinetic equations were used to investigate the morphology,quantity,and size of TiN in the center of high-titanium high-strength s... Metallographic microscopy,scanning electron microscopy and TiN growth thermodynamic and kinetic equations were used to investigate the morphology,quantity,and size of TiN in the center of high-titanium high-strength steels under different solidification cooling rates.The results showed that TiN in the center of the experimental steels mainly existed in three forms:single,composite(Al2O3-TiN),and multi-particle aggregation.TiN began precipitating at around 1497℃(solidification fraction of 0.74).From the end of melting to solidification for 180 s,the cooling rates in the center of the experimental steels for furnace cooling,air cooling,refractory mold cooling,and cast iron mold cooling tended to stabilize at 0.17,0.93,1.65,and 2.15℃/s,respectively.The size of TiN in the center of the experimental steel cooled using furnace cooling was mainly concentrated in the 5-15 pm range.In contrast,the size of TiN in the center of the experimental steels cooled using air cooling,refractory mold cooling,and cast iron mold cooling were mainly concentrated in the 1-5 pm range.In addition,their density of TiN in the center of the experimental steels is signif-icantly higher than that of the furnace-cooled experimental steel.Thermodynamic and kinetic precipitation models of TiN established predicted the growth size of TiN in a high-titanium high-strength steel when the solidification cooling rates are not below 0.93℃/s. 展开更多
关键词 High-titanium steel Cooling method TIN THERMODYNAMICS Kinetics
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Pitting corrosion initiated by SiO_(2)-MnO-Cr_(2)O_(3)-Al_(2)O_(3)-based inclusions in a 304 stainless steel
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作者 Jin-zhen Hu Shi Li +2 位作者 Ji Zhang Ying Ren Li-feng Zhang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第9期2281-2293,共13页
The influence of the aluminum content on the pitting corrosion of a 304 stainless steel by a Cl−solution was investigated.The number,area,and composition of non-metallic inclusions were modified by the addition of alu... The influence of the aluminum content on the pitting corrosion of a 304 stainless steel by a Cl−solution was investigated.The number,area,and composition of non-metallic inclusions were modified by the addition of aluminum in the steel,which was responsible for the variation of the corrosion degree of the 304 stainless steel.Inclusions detection,corrosion test,electrochemical test,thermodynamic calculation,and first-principles calculation were performed to evaluate the pitting corrosion of the stainless steel.The initiation of the pitting corrosion by three types of inclusions,including(Mn,Si,Cr,S)O,(Mn,Al,Cr)O,and Al_(2)O_(3)were in-situ observed.After corroding for 880 min,the corrosion index of(Mn,Si,Cr,S)O,(Mn,Al,Cr)O,and Al_(2)O_(3)was 0.38%,0.02%,and 0.00%min−1,respectively.With the increase in aluminum content in the steel,the pitting potential of the stainless steel was 0.131,0.304,and 0.338 V,respectively,indicating that a higher aluminum content in the steel was beneficial to improving the pitting corrosion resistance of the 304 stainless steel. 展开更多
关键词 Pitting corrosion 304 stainless steel Non-metallic inclusion First-principles calculation Galvanic corrosion
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Achieving Fine-Grained Microstructure and Superior Mechanical Property in a Plain Low-Carbon Steel Using Heavy Cold Rolling Combined with Short-Time Heat Treatment
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作者 Yuxuan Liu Shichang Liu +4 位作者 Liming Fu Huanrong Wang Wei Wang Mao Wen Aidang Shan 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2023年第10期1719-1734,共16页
A new thermomechanical process consisting of heavy cold rolling(HCR)and short-time heat treatment(STH)is developed to fabricate fine-grained martensite microstructure in a low-cost plain low-carbon steel.To achieve th... A new thermomechanical process consisting of heavy cold rolling(HCR)and short-time heat treatment(STH)is developed to fabricate fine-grained martensite microstructure in a low-cost plain low-carbon steel.To achieve the optimal mechanical properties after STH,three different ferrite-pearlite(F-P)dual-phase microstructures are prepared via hot rolling(HR),HR and austenitizing,and HR and HCR.The microstructure evolution and the comprehensive mechanical properties of the alloy during STH are then investigated.We find that the volume fractions of transformed martensite after STH increase with decreasing grain sizes of the pre-STH F-P dual phases.The rapid heating and short-time holding of STH promote grain nucleation and inhibit grain growth,resulting in microstructure refinement.The formation of martensites with different morphologies and different carbon concentrations in the HR and HCR+STH alloy is identified,owing to the inhomogeneous carbon distribution by STH.Tensile experiments demonstrate that STH greatly improves the comprehension mechanical properties of the alloy.Excellent mechanical properties,with a yield strength of 1224 MPa,a tensile strength of 1583 MPa,a uniform elongation of 4.0%and a total elongation of 7.3%are achieved in the HR and HCR+STH alloy.These excellent mechanical properties are principally attributed to the microstructure refinement and martensite formation induced by STH,with a yield strength improvement of 134%and a tensile strength improvement of 150%relative to the HR alloy. 展开更多
关键词 Heat treatment MICROSTRUCTURE Plain low-carbon steel Mechanical properties
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Flatness Control Based on Dynamic Effective Matrix for Cold Strip Mills 被引量:24
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作者 LIU Hongmin HE Haitao +1 位作者 SHAN Xiuying JIANG Guangbiao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2009年第2期287-296,共10页
Steel strips are the main of steel products and flatness is an important quality indicator of steel strips. Flatness control is the key and highly difficult technique of strip mills. The bottle-neck restricting the im... Steel strips are the main of steel products and flatness is an important quality indicator of steel strips. Flatness control is the key and highly difficult technique of strip mills. The bottle-neck restricting the improvement of flatness control techniques is that the research on flatness theories and control mathematic models is not in accordance with the requirement of technique developments. To build a simple, rapid and accurate explicit formulation control model has become an urgent need for the development of flatness control technique. This paper puts forward the conception of dynamic effective matrix based on the effective matrix method for flatness control proposed by the authors under the consideration of the influence of the change of parameters in roiling processes on the effective matrix, and the concept is validated by industrial productions. Three methods of the effective matrix generation are induced: the calculation method based on the flatness prediction model; the calculation method based on the data excavation in rolling processes and the direct calculation method based on the network model. A fuzzy neural network effective matrix model is built based on the clusters, and then the network structure is optimized and the high-speed-calculation problem of the dynamic effective matrix is solved. The flatness control scheme for cold strip mills is proposed based on the dynamic effective matrix. On stand 5 of the 1 220 mm five-stand 4-high cold strip tandem mill, the industrial experiment with the control methods of tilting roll and bending roll is done by the control scheme of the static effective matrix and the dynamic effective matrix, respectively. The experiment result proves that the control effect of the dynamic effective matrix is much better than that of the static effective matrix. This paper proposes a new idea and method for the dynamic flatness control in the rolling processes of cold strip mills and develops the theory and model of the flatness control effective matrix method. 展开更多
关键词 cold strip mill flatness control dynamic effective matrix CLUSTER fuzzy neural network
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