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Research of DCR co.lant Spray co.trol Model in Baosteel

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Research of DCR Coolant Spray Control Model in Baosteel

A data-driven approach to RUL prediction of tools

第十届国际轧钢大会

作者： li Xiujun~1,Zhang Xibang~2,wei Xiao~1 (1.steel Sheet cold rolling plant,baoshan iron & steel co.,ltd.,shanghai 200431,china 2.School of Mechanical Engineering,University of Science and Technology Beijing, Beijing 100083,china)

＜正＞The DR material has its characteristics such as very thin specification,strong intensity, high flatness and surface *** has produced with the double cold reduction（DCR） technology for several years in *** this paper,we present the slicing water and co.ling synthesis co.trol object function and establish a set of co.lant spray synthesis co.trol model,which has been applied in the productive practice of Baosteel DCR *** makes the co.lant supply of mill not only satisfy the request of slicing water to assure surface quality of strip steel but also get effective co.ling to assure flatness quality of strip steel,and it gets substantial eco.omic return and has further extend application value.

关键词： double cold reduction slicing water co.ling flatness

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Advances in Manufacturing 2024年第1期12卷 6-18页

作者： wei li liang-Chi Zhang Chu-Han Wu Yan Wang Zhen-Xiang Cui Chao Niu Department of Mechanical Engineering University College LondonLondonWC1E 7JEUK Shenzhen Key Laboratory of Cross-Scale Manufacturing Mechanics Southern University of Science and TechnologyShenzhen518055GuangdongPeople’s Republic of China SUSTech Institute for Manufacturing Innovation Southern University of Science and TechnologyShenzhen518055GuangdongPeople’s Republic of China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055GuangdongPeople’s Republic of China School of Mechanical and Manufacturing Engineering The University of New South WalesKensingtonNSW2052Australia baoshan iron&steel co. Ltd.Shanghai200941People’s Republic of China

An effective and reliable prediction of the remaining useful life(RUL)of a tool is important to a metal forming process because it can significantly reduce unexpected maintenance,avoid machine shutdowns and increase system *** study proposes a new data-driven approach to the RUL prediction for metal forming processes under multiple co.tact sliding *** data-driven approach took advantage of bidirectional long short-term memory(BLSTM)and co.volutional neural networks(CNN).A pre-trained lightweight CNN-based network,WearNet,was re-trained to classify the wear states of workpiece surfaces with a high accuracy,then the classification results were passed into a BLSTM-based regression model as inputs for RUL *** experimental results demonstrated that this approach was able to predict the RUL values with a small error(below 5%)and a low root mean square error(RMSE)(around 1.5),which was more superior and robust than the other state-of-the-art methods.

关键词： Remaining useful life(RUL) Bidirectional long short-term memory(BLSTM) Data-driven approach Metal forming

Modeling Study of the Particle Pinning Effect on the Grain Boundary Movement

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Journal of iron and steel Research International 2011年第S1期18卷 342-345页

作者： WANG Xue-lun 1,FU li-ming 2,WANG wei 3,JIA Zhi-xin 1 (1.Rizhaosteel Technology Center,Rizhao iron and steel co.ltd.Rizhao 276806,china 2.School of Materials Science and Engineering,shanghai Jiaotong University,shanghai 200240 china 3 Department of Structural steels,Baosteel Research Institute,shanghai 201900,china) Rizhao iron & steel co.ltd Rizhaosteel Technol Ctr Rizhao 276806 Peoples R China shanghai Jiao Tong Univ Sch Mat Sci & Engn Shanghai 200240 Peoples R China Baosteel Res Inst Dept Struct Steels Shanghai 201900 Peoples R China

In this work,based on the classical grain boundary (GB) formula and the principle of work-energy co.version,a new physically-based model has been developed to predict the particle pinning force co.cerning the interaction between seco.d phase particles (SPPs) and the moving *** effect of particles pinning on the GB movement is *** modeling results can be applied to quantitatively determine the critical numbers of SPPs required for co.plete pining the grain growth,such as the critical SPPs number of the unit GB area,the critical number for single grain stagnation,the critical volume fraction of particles at a given particle *** predictions are in good agreement with the experimental results by Gladman.

关键词： the seco.d-phase particle pinning force physical-based model

Effect of co.ling method on TiN precipitation behavior of high-titanium high-strength steel during solidification

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Journal of iron and steel Research International 2024年第7期31卷 1692-1703页

作者： Xue-jian Zhang Guang-wei Yang Yong Wan Yong-hong Wen Chuan-sheng Tang Ming-qi liu li-jie Tian Key Laboratory of Metallurgical Emission Reduction and Resources Recycling Anhui University of TechnologyMa'anshan 243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243002AnhuiChina Baosteel Central Research Institute Baoshan Iron and Steel Co.Ltd.Shanghai 201999China

Metallographic microsco.y,scanning electron microsco.y 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 co.ling *** results showed that TiN in the center of the experimental steels mainly existed in three forms:single,co.posite(Al2O3-TiN),and multi-particle *** began precipitating at around 1497℃(solidification fraction of 0.74).From the end of melting to solidification for 180 s,the co.ling rates in the center of the experimental steels for furnace co.ling,air co.ling,refractory mold co.ling,and cast iron mold co.ling tended to stabilize at 0.17,0.93,1.65,and 2.15℃/s,*** size of TiN in the center of the experimental steel co.led using furnace co.ling was mainly co.centrated in the 5-15 pm *** co.trast,the size of TiN in the center of the experimental steels co.led using air co.ling,refractory mold co.ling,and cast iron mold co.ling were mainly co.centrated in the 1-5 pm *** addition,their density of TiN in the center of the experimental steels is signif-icantly higher than that of the furnace-co.led experimental *** and kinetic precipitation models of TiN established predicted the growth size of TiN in a high-titanium high-strength steel when the solidification co.ling rates are not below 0.93℃/s.

关键词： High-titanium steel co.ling method TiN Thermodynamics Kinetics

Optimizing temperature co.fficient of Sm2co.7-type magnets through adjusting the isothermal aging process

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Journal of Rare Earths 2024年第11期42卷 2097-2104页

作者： Chao Wang Die Hu Qiangfeng li Yikun Fang Meng Zheng Lei Wang Hongsheng Chen Lei Zhao Haizhou Wang Minggang Zhu wei li Division of Functional Materials Research Central Iron and Steel Research Institute shanghai Aerospace co.trol Technology Institute Beijing Advanced Innovation Center for Materials Genome Engineering Central Iron and Steel Research Institute Beijing Key Laboratory of Metal Materials Characterization Central Iron and Steel Research Institute

The high-temperature magnetic perfo rmance and micro structure of Sm1-xGdx(co.alFe0.09Cu0.09Zr0.025)7.2（x=0.3,0.5） magnets were *** the isothermal aging time decreasing from 11 to 3 h,the temperature co.fficient of intrinsic co.rcivity in the temperature range of 25-500℃,β25-500℃,was optimized from -0,167%/℃ to-0.112%/℃ for x=0.3 *** noticeable enhancement（～33%） of temperature stability is co.related with the increased co.tent of 1:5H cell boundary phase and its relatively high Curie temperature as ***,for the x=0.5 magnet,it is found that the presence of Sm5co.9phases and wider nanotwin variants hinder the formation of 1:5H cell boundary *** insufficient 1:5H is not beneficial to the proper redistribution of Cu in cell boundary,making the x=0.5 magnet difficult to achieve higher temperature ***,the approach of adjusting the isothermal aging process can offer guidance for attaining superior magnetic performance in the temperature range from 25 to 500℃ for Gd-substituted Sm2co.7-type magnets.

关键词： Isothermal aging process Rare earths Sm2co.7-type magnets Temperature co.fficient of intrinsic co.rcivity

High Magnetic Property and Toxicity of Particulate Matter Generated during Welding and Cutting Processes

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Environment & Health 2024年第6期2卷 381-389页

作者： wei Cui Zizhen Ma Yuanzheng Chen Shuya li Di Wu Xiu Chen Yuankai Shao Yuzhe liu Qing li Jianmin Chen shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China shanghai Institute of Eco.Chongming(SIEC) Shanghai 200062China National Engineering Laboratory for Mobile Source Emission co.trol Technology China Automotive Technology&Research Center Co.LtdTianjin 300300China

Magnetic particulate matter(PM)has raised increasing co.cern due to its abundant presence in ambient air and negative health ***,there is still a lack of co.prehensive understanding of their emission sources and *** here report the observation of high magnetic property and toxicity of PM generated during typical welding and cutting ***,formed during high-temperature operation with less oxygen pressure,was revealed to be the major magnetic *** averaged saturation magnetization and magnetic susceptibility values of fine PM(PM_(2.5))from welding processes are 1.4−4.2 times greater than those of PM emitted from other unintended emission sources,including iron and steel plants and brake wear,while they are 2.0−5.7 times greater for the cutting ***,PM_(2.5)from welding and cutting processes are nearly 3.5−4.5 times more neurovirulent and 2.1−7.0 times more likely to induce oxidative stress than those from other magnetic sources in the nerve cells ***,all of these magnetic PM_(2.5)exhibit greater negative health effects than typical atmospheric PM_(2.5)co.lected in shanghai urban *** new findings suggest that appropriate occupational protection measures should be implemented for the welding and cutting process to reduce adverse health impacts.

关键词： pollutant emission magnetic property particulate matters magnetite welding and cutting

Effect of annealing parameters on mechanical properties of cold-rolled martensitic steel sheets

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Baosteel Technical Research 2012年第1期6卷 3-6页

作者： ZHU Xiaodong1,2),li Xufei1,2) and DU Peifang1,2) 1) Auto steel Division,Research Institute,baoshan iron & steel co.,ltd.,shanghai 201900,china 2) State Key Laboratory of Development and Application Technology of Automotive steels (Baosteel),shanghai 201900,china Auto steel Division Research Institute Baoshan Iron & Steel Co. Ltd. Shanghai 201900 China State Key Laboratory of Development and Application Technology of Automotive steels(Baosteel) Shanghai 201900 China

cold-rolled martensitic steel sheets produced on co.tinuous annealing lines with water quenching facility,have advantages of high strength and low alloying element *** are in good acco.dance with the trend of light-weighting and fuel saving for automotive *** this article,a cold-rolled martensitic steel is studied to investigate the effect of annealing parameters on its mechanical *** is found that the quenching temperature and the slow co.ling speed as well as the overageing temperature have significant influence on the strength of the experimental *** temperature zone at which the austenite deco.position is slow or has not started may be chosen as the quenching temperature to ensure the steel’s strength *** slow co.ling speed also influences the steel’s strength greatly.A high co.ling rate will lead to significantly higher *** would decrease the steel’s tensile strength but would increase its yield strength.

关键词： martensitic steel cold-rolled steel sheet co.tinuous annealing

Deformation Uniformity of cold-Rolled Q235 steel Rebar by FEM in Bending and rolling Processes

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Journal of iron and steel Research International 2012年第8期19卷 37-42页

作者： SUI Feng-li1, CHEN Qi-wei1, ZHU Guo-hui1, liU Bao-dong2 (1. Anhui Key Laboratory of Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, Anhui, china 2. Dongyang steel Making co.ltd. Shenyang 110026, liaoning, china) [a] Anhui Key Laboratory of Materials and Processing School of Materials Science and Engineering Anhui University of Technology Maanshan 243002 Anhui China [b] Dongyang steel Making co.ltd Shenyang 110026 Liaoning China

An analytic model based on ANSYS/LS-DYNA has been developed on the cold rolling process for Q235 steel rebar with 12 mm in diameter. The elastic-plastic finite element method (FEM) and the cold deformation resistance model of Q235 steel were adopted in this model. Deformation uniformity of the final product has been analyzed using this model. The results indicate that the uniformity of the final product is obtained only as the centerline of the bending rolls is vertical to the centerline of the driven roll and parallel to the centerline of the drive roll in the whole rolling process. Besides, the number of the bending rolls must even realize the co.tinuous bending and reverse bending process. Also, the number of the bending rolls must match the deformation degree of the workpiece in the cold rolling process. The validity of this finite element model was verified by the size and distribution of grains from the billet to the rebar in a practical cold rolling process.

关键词： deformation uniformity Q235 steel rebar finite element method cold rolling mechanical descaling

Bagaryatsky取向的铁素体/渗碳体相界结构模拟

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上海交通大学学报 2005年第1期39卷 14-17页

作者：王志成李伟郭正洪戎咏华张弛上海交通大学材料科学与工程学院上海200030 宝山钢铁股份有限公司技术中心产品研究所上海201900

近似重位点阵模拟的结果表明,具Bagaryatsky取向的铁素体/渗碳体界面上的台阶并非本征结构,即台阶无特定宽度与高度.这种结构台阶不仅导致两相界面能可在一定范围内波动,而且导致铁素体/渗碳体无宏观的惯习面,有利于珠光体在生长时根据... 详细信息

近似重位点阵模拟的结果表明,具Bagaryatsky取向的铁素体/渗碳体界面上的台阶并非本征结构,即台阶无特定宽度与高度.这种结构台阶不仅导致两相界面能可在一定范围内波动,而且导致铁素体/渗碳体无宏观的惯习面,有利于珠光体在生长时根据动力学条件发生弯曲.

关键词：铁素体渗碳体界面近似重位点阵结构台阶界面能