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Journal of iron and steel Research International 2011年第S1期18卷 615-620页

作者： DONG Rui-feng 1,2,LI De-gang 1,2,YAN Bo 2,WANG Guo-dong 1 (1.The State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110004,china 2.Baotou iron and steel (group) Co ltd.Compact Strip Production Plant,Baotou 014010,china) Northeastern Univ State Key Lab Rolling & Automat Shenyang 110004 Peoples R China Baotou iron & steel Grp Co ltd Compact Strip Prod Plant Baotou 014010 Peoples R China

The effects of technological parameters on microstructures and properties of low cost hot rolled dual-phase steel was researched by design different finish rolling temperature,mid cooling temperature between laminar cooling and UFC (ultra fast cooling) and stable UFC rate on the same gauge strips with the same chemistry composition during the manufacture *** is the key for controlling coil temperature to control finish rolling temperature and mid cooling temperature between laminar cooling and UFC that based on stable UFC rate *** lower finish rolling temperature,with mid cooling temperature between laminar cooling and UFC,the better to form martensite *** foundation of developing the similar productions on the similar product line was *** is good to technological advancement of developing high affixation value production as hot rolled DP steel,TRIP steel *** CSP line.

关键词： finish rolling temperature mid cooling temperature between laminar cooling and UFC hot rolled dual-phase steel microstructures and properties

Intelligent Control on Hot Strip Coiling Temperature

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International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 147-150页

作者： Heping Liu Yanlong Zhao(Information Engineering School, University of Science and Technology Bejing, Beijing 100083, china)(Handan iron & steel (group) Co, Handan 056015, china) Information Engineering School University of Science and Technology Beijing Beijing 100083 China Handan iron and steel (group) Co. Handan 056015 China

A new intelligent control scheme for hot strip coiling temperature is presented. In this scheme, the prediction mode1 of finishing temperature and the presetting model of main cooling zone are establish based on BP neural network, the feed-forward open-loop control model of main cooling zone is constructed based on T-S fuzzy neural network, a new improved structure of T-S fuzzy neural network is developed, and the feedback close-loop control model of precision cooling zone is obtained based on fuzzy control. The effectiveness of the proposed scheme has been demonstrated by computer simulation with a satisfactory result.

关键词： coiling temperature control laminar cooling fuzzy control neural network, fuzzy neural network

Chemistry Design of B-Containing Ultra-Heavy Plate steels Aided by Thermo-Calc Calculation

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Journal of iron and steel Research International 2011年第S1期18卷 242-245页

作者： PAN Tao 1,WANG Xiao-yong 1,WANG Hua 2,LI Yun 2,SU Hang 1,YANG Cai-fu 1 (1.Division of structural materials,Central iron and steel Research Institute,Beijing 100081,china 2.Anshan iron and steel Co ltd.Anshan 114001,Liaoning,china) Cent iron & steel Res Inst Div Struct Mat Beijing 100081 Peoples R China Anshan iron & steel Co ltd Anshan 114001 Liaoning Peoples R China

Effect of N-bonding elements on dissolution and precipitation of B in micro B-treated ultra-heavy plate steels has been investigated,utilizing Thermo-Calc thermo-dynamic software and experimental *** calculation results show that Titanium or excessive Aluminum content is effective to bond Nitrogen,preventing BN from forming and thus keeping boron in solid solution in austenite,while Vanadium is *** experiment has also revealed that slight amount of solution Boron by addition of Ti or a little excessive Aluminum is helpful to improve hardenability of the steels.

关键词： boron hardenability thermo-Calc ultra-heavy plate aluminum

Abnormality of magnetic behavior and core loss of nanocrystalline Fe_(73.5)Cu_1Nb_3Si_(15.5)B_7 alloy

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Science china(Technological Sciences) 2010年第2期53卷 343-347页

作者： DONG BangShao1, ZHI QiZheng2, LI DeRen1, LU ZhiChao1 & ZHOU ShaoXiong1 1 Central iron & steel Research Institute, Advanced Technology & Materials Co., ltd., Beijing 100081, china 2 School of Materials & Metallurgy, Northeastern University, Shenyang 110004, china Central iron & steel Research Institute Advanced Technology & Materials Co. Ltd. Beijing China School of Materials & Metallurgy Northeastern University Shenyang China

The correlation between microstructure and magnetic properties of Fe73.5Cu1Nb3Si15.5B7 alloy annealed at 360°C—620°C has been investigated. The best static and dynamic soft magnetic properties have been obtained after annealing at 500°C and 550°C for 1 h, respectively. The dependence of annealing temperature on coercivity has shown three magnetic hardenings for the studied alloys annealed at 460°C, 530°C and 620°C, respectively. And the plot of core loss as a function of annealing temperature manifests a peak at 530℃, and this peak increases with increasing magnetic induction at low frequencies. This effect can probably be attributed to the precipitation of a new phase.

关键词： nanocrystalline coercivity magnetic hardening core loss

Technical Study on Ultra-Low Sulfur steel Production in Ansteel

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Journal of iron and steel Research International 2011年第S1期18卷 567-571页

作者： XU Xiang-yang (No.1 steelmaking Plant of Angang steel Co ltd.,Anshan 114031,china) 1 steelmaking Plant Angang steel Co ltd Anshan 114031 Peoples R China

Based on the fact of long period deep desulfurization treatment in LF,the relationships among top slag constituent in LF,molten steel constituent,stirring ability of blowing argon,molten steel temperature and desulphurization rate were *** the experiments,the parameters about treatment technology of top slag in LF,the [Als] content in molten steel,slag charge match,molten steel temperature and the argon flow for stirring have been *** desulphurization treatment period in LF can be shortened by 5～8 *** target sulfur content in molten steel can be controlled below 30 ppm within one LF treatment period which is only 36 *** LF treatment period of ultra-low sulfur steel can primarily match with the continuous casting period,multi-heat continuous casting can be ensured.

关键词： ultra-low sulfur steel LF deep desulphurization treatment

Analysis on the Microstructure and Performance Evolvement of Alloyed Tool steel Hot Rolling Strip Produced by CSP Technology

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Journal of iron and steel Research International 2011年第S1期18卷 621-624页

作者： CHEN Jing-hu 1,2,JIE Xiao-hua 1 (1.Faculty of Materials and Energy,Guangdong University of Technology,Guangzhou510006,Guangdong,china 2.Technology Center of Guangzhou steel group Co ltd.,Guangzhou510380,Guangdong,china) Guangdong Univ Technol Fac Mat & Energy Guangzhou 510006 Guangdong Peoples R China Guangzhou steel Grp Co ltd Ctr Technol Guangzhou 510380 Guangdong Peoples R China

This thesis determinates the microstructure and inclusions of the alloyed tool steel by CSP processing with the help of *** results show that the slab microstructures are the fine branched crystalline grains and the branch width has little disparity from the surface to the central *** the product,the grain microstructures are fine pearlites and few ferrites with the pearlite space 0.4μm to 0.2μm.

关键词： compact strip production alloyed tool steel microstructure grain

Novel Fe-based amorphous magnetic powder cores with ultra-low core losses

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Science china(Technological Sciences) 2010年第5期53卷 1290-1293页

作者： ZHANG Liang1,2,LI DeRen1,2,LU ZhiChao1,2,LU CaoWei1,2,LIU TianCheng1,2,GUO Feng2,LIU KaiHuang1,WANG Jun 2 & ZHOU ShaoXiong1,2 1 Central iron and steel Research Institute,Beijing 100081,china 2 Advanced Technology and Materials Co.,ltd.,Beijing 100081,china Central iron and steel Research Institute Beijing China Advanced Technology and Materials Co. Ltd. Beijing China

Amorphous magnetic alloy powders were prepared from bulk metallic glasses Fe74Cr2Mo2Sn2P10Si4B4C2 with supercooled liq-uid region of 32 K by water *** magnetic powder core precursor was produced from a mixture of the amorphous alloy powder with addition of insulation and bonding materials by mold compacting at room *** annealing the core precursor,the amorphous magnetic core exhibits superior magnetic properties as compared with molypermalloy powder *** initial permeability up to 1 MHz was about 80,the flux density at 300 Oe was 1.06 T and the core loss at 100 kHz for Bm=0.1 T was only 329 kW/*** ultra-low core loss is attributed to the combination of relatively high resistivity and the amorphous structure of the Fe-based amorphous *** the outstanding magnetic properties,the Fe-based amorphous magnetic powder core had a much lower cost which renders the powder cores a potential candidate for a variety of industrial applications.

关键词： Fe-based amorphous powder water atomization amorphous powder core ultra-low core loss

Characteristics of Hot Ductility in steels Containing Nb,Ti

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Journal of iron and steel Research International 2011年第S1期18卷 372-376页

作者： SONG Hai-wu 1,QI Chang-fa 1,AI Xing-hui 2 (1.Technology Center of Tangshan iron and steel group Company ltd.Tangshan 063016,Hebei,china 2.Department of Metallurgy,Tangshan Vocational College of Science and Technology,Tangshan 063001,Hebei,china) Tangshan iron & steel Grp Co ltd Ctr Technol Tangshan 063016 Hebei Peoples R China Tangshan Vocat Coll Sci & Technol Dept Met Tangshan 063001 Hebei Peoples R China

The hot ductility was measured for a series of steels containing Nb and/or Ti with Gleeble-3500 thermo-mechanical *** is found that the effect of austenitizing temperature on hot ductility of Nb-containing steel is *** the austenitizing temperature rises up,the shape of embrittling curve (SEC) from V-shape gradually changes to U-shape,and the range of embrittling temperature widens out and the embrittling degree *** SEC of Nb-containing steel is U-shaped and the embrittling temperature range is about 600-1050℃.The initial temperature of embrittlement on the right is nearly independent of carbon *** SEC of Ti-containing steel is N-shaped and two lowest points are at about 600℃ and the A-F transformation *** SEC of Nb-Ti-containing steel is basically the superposition of two shapes mentioned *** crack on straightening in continuous casting belongs to intergranular fracture,and the crack on rolling (crack expansion) belongs to transgranular fracture.

关键词： hot ductility crack Nb-containing steel Ti-containing steel

Research on the Welding Process of 590MPa Grade High Strength Automobile Beam steel

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Journal of iron and steel Research International 2011年第S1期18卷 983-986页

作者： ZHANG Wu,HU Xue-wen,LIU Yong-gang,YANG Xing-liang,ZHANG Jian (Technological Center,Maanshan iron & steel Co.,ltd.,Maanshan243000,Anhui,china) Maanshan iron & steel Co ltd Ctr Technol Maanshan 243000 Anhui Peoples R China

590 MPa automobile beam steel strips are used mainly to manufacture the longitudinal beam of ***’s welding properties are critical to the safety of *** microstructure and mechanical properties of welding joints processed by CO 2 arc welding with different welding parameters were *** results showed that the welding joints were weak when welding heat input were small and the non metal inclusions were found in the weld joints when welding heat input are *** quality of the welding joints is good enough at 170A of the arc current and 24V of the arc *** the other welding parameters fixed,the incomplete fusion defect occurred in the welding joint with backward welding,but the quality of the welding joint is good with forward welding.

关键词： automobile beam steel CO 2 arc welding welding process

Improvement in the Oxidation Resistance of Tungsten by Sol-Gel Derived Al_2O_3 Coating

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稀有金属材料与工程 2012年第S1期41卷 303-305页

作者： Fan Ailing1,Meng Lingsheng1,Huang Lang1,2,Ma Jie1 1 College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,china 2 Department of Safety and Environment,Xinyu iron&steel group Co.ltd.Xinyu 338001,china Beijing Univ Technol Coll Mat Sci & Engn Beijing 100124 Peoples R China Xinyu iron & steel Grp Co ltd Dept Safety & Environm Xinyu 338001 Peoples R China

An Al2O3 coating was prepared from aluminum isopropoxide as precursor on tungsten *** dependences of crystalline and phase in Al2O3 coating on temperature were *** results show the coatings being compact,uniform and crack-free can be obtained by suitable *** main phase of coating is α-*** to the uncoated specimens,the ones with coatings synthesized by sol-gel process provide excellent oxidation resistance at high temperature.

关键词： sol-gel process tungsten filament Al2O3 coating