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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

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

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

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

The Applications and Practice of Front Ultra Fast Cooling Technology in C-Mn steel

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Journal of iron and steel Research International 2011年第S1期18卷 576-580页

作者： ZUO Jun 1,LIU Yong 2,ZHANG Kai-hua 1,YE Xiao-yu 1,LI Wei-ping 2,HUANG Xu-jing 2 (1.PanGang group Research Institute Co,ltd.Chengdu,611731,Sichuan,china 2.PanGang group Panzhihua steel & Vanadium Co,ltd.Panzhihua,617067,Sichuan,china) PanGang Grp Res Inst Co ltd Chengdu 611731 Sichuan Peoples R China PanGang Grp Panzhihua steel & Vanadium Co ltd Panzhihua 617067 Sichuan Peoples R China

Ultra Fast Cooling is a new technology which used to control the hot-rolling strip cooling in recent years on the international *** can achieve fast and accurate temperature control in the hot-rolled strip production process to obtain corresponding transformation microstructure and ideal mechanical *** article describes the technical principle and layout of ultra fast cooling in hot-rolled as well as cooling *** the effect of front ultra fast cooling technology in C-Mn steel and obtained consequent on the industrial produced low-cost Q345 hot rolled steel in Panzhihua iron and steel.

关键词： ultra fast cooling controlled rolling and controlled cooling Q345 low-cost

Development and Production of X120 Strip With Excellent Toughness in Shougang steel

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Journal of iron and steel Research International 2011年第S1期18卷 908-914页

作者： ZHANG Yong-qing 1,LI Ming 2,LI Yong-dong 1,JIN Wei 2,ZHU Guo-sen 1,LI Yan-feng 3,TIAN Peng 3,WANG Quan-li 1,WU Xin-lang 2,WANG Xue-qiang 2 (1.Shougang Research Institute of Techonolgy,Beijing,china 2.Qian’an iron and steel Company of Shougang group,Hebei Province,china 3.North china Petroleum steel Pipe Co.,ltd. Shougang Res Inst Techonolgy Beijing Peoples R China Qianan iron & steel Co Shougang Grp Qianan Hebei Province Peoples R China N china Petr steel Pipe Co ltd Shouguang City Shandong Peoples R China

In this paper,the product designs,mechanical properties and microstructure of ultra-high strength linepipe steel in grade X120 strip with a thickness of 16mm have been shown and analyzed *** tensile test results with different directions,including transverse,longitudinal and 30° to the rolling direction,showed that the yield strength and ultimate tensile strength reach and exceed 900MPa and 1000MPa respectively,which are far higher than requirements of X120,such as 827MPa and *** the other hand,as shown from the test results of Charpy impact tests at different temperatures from 20 ℃ to-60 ℃,the absorbed energies and fracture shear area at-60℃ are about 200J and 100% respectively,which is very exciting and *** order to clarify the strengthening mechanism and effect of X120 strip further,microstructure has been observed through *** of the metallography revealedthat the microstructure was composed of lower bainitewith a size of 1um and fine M/A *** X120 strip was formed into 1420 mm diameter spiral welded pipe in Huabei pipe *** results showed that ultra-high strength and high toughness linepipe could be achieved through reasonable alloy composition design and optimized rolling processes.

关键词： linepipe steel ultra-high strength excellent toughness ultra-fined bainite X120

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热速处理对ZA42合金微观组织的影响

特种铸造及有色合金 2003年第2期23卷 13-15页

作者：李成栋田学雷耿浩然边秀房李保伟山东大学济南钢铁集团铸钢厂

采用热速处理试验、DTA热分析和TEM方法对ZA42合金熔体结构特征进行了研究 ,考察了热速处理对熔体结构特征的影响。结果表明 ,该合金在 810℃左右有热效应变化 ,随着快速冷却温度的增高 ,熔体结构趋于均匀 ,作为过渡相的灰相含量增加 ;... 详细信息

采用热速处理试验、DTA热分析和TEM方法对ZA42合金熔体结构特征进行了研究 ,考察了热速处理对熔体结构特征的影响。结果表明 ,该合金在 810℃左右有热效应变化 ,随着快速冷却温度的增高 ,熔体结构趋于均匀 ,作为过渡相的灰相含量增加 ;同时合金中α

关键词： ZA42合金热速处理熔体结构

Clinical Development of Jingming Acupoint

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Clinical Development of Jingming Acupoint

Filtration Technology—An Effective Way to Improve Quality of Heavy iron Castings

Academic Conference of the Tenth Anniversary of World Federation of Acupuncture-Moxibustion

作者： Yu Qingzhang Zhou Shengming (Hospitial of jinan No . 2 Machine-Tool group Co. ltd. jinan Shangdong 250022 P . R . china )

＜正＞Jingming acupoint is the confluence of the Five Channels: Hand-Taiyang, Foot-Taiyang, Foot-Yangming, Yingqiao, Yangqiao, whose location is at the upper outside sunken place of angulus oculi medialis or at the point of caruncula lacrimalis of angulus oculi medialis. The authors use 3 methods: needling,, massaging and eye drip on this acupoint and have got very good results in acute lumbar sprain, lumbar intervertebral disc, headache;vertigo;hemiplegy due to apoplexy in several hundred cases. Such applications are not recorded in Chinese traditional medical books. In them the main

关键词：

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Filtration Technology—An Effective Way to Improve Quality o...

Analysis and Control on Fracture of 20Mn2A High Tensile steel for Round Link Chain

第69届世界铸造会议暨2010中国铸造活动周

作者： ~* Zhang Kefeng Zhu Jianxun jinan Shengquan group Share-holding Co. ltd. jinan 250204 china

＜正＞Higher quality is required to heavy iron castings in recent years,so that strict control of casting defect is *** most common casting defect is *** technology is a very effective way to eliminate this defect, and the technology has been applied to more and more heavy iron *** technology for heavy iron castings is discussed in this paper:filtration mechanism,parameter of design,some points for attention,application examples,etc.

关键词： inclusion filtration filter heavy iron casting

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Journal of iron and steel Research International 2011年第S1期18卷 898-902页

作者： CAO Shu-wei 1,2,KANG Yong-lin 1,3,ZHAO Xian-ping 2,YANG Chang-chun 1 (1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,china 2.Technology Center of Anyang iron & steel group Co.,ltd.,Anyang 455004,Henan,china 3.State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,china) Univ Sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China Anyang iron & steel Grp Co ltd Ctr Technol Anyang 455004 Henan Peoples R China Univ Sci & Technol Beijing State Key Lab Adv Met & Mat Beijing 100083 Peoples R China

Based on the phenomenon of brittle fracture occurred during tensile test for 20Mn2A high strength circular chain used in coal mines,the fracture property is regarded as intercrystalline brittle one after macroscope observation and metallographic *** is analysed that the intercrystalline brittle fracture is due to high tempering temperature and limited processing site where final products are piled together after heat treatment,which lead to a lower cooling rate of internal chain,with Si,Mn and P etc elements segregating and enriching in the austenite grain boundary and forming high tempering *** these circular chains are tempered again for one hour at 670℃,and oil-cooled rapidly,due to the reversibility of high temper brittleness for structural alloy steel,the high temper brittleness can be eliminated and products are completely qualified after tensile inspection.

关键词： high strength circular chain metallographic examination brittle fracture high tempering brittleness improvement measures