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Search Results: 1 - 10 of 1240 matches for " Shanghai Baoshan Iron and Steel Complex "
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Diffusion Behaviour of Fe-Cu Interface of Copper Brazed Double-wall Steel Tubes
Yourong XU Deying WANG Qi JIN Yijian ZHOU Shanghai University of Science,Technology,Shanghai,ChinaFan HU Chao LIU Iron,Steel Research Institute of Baoshan Iron,Steel Complex,Shanghai,China,

材料科学技术学报 , 1993,
Abstract: By means of electron probe(EPMA),scanning electron microscope(SEM),and optical microscope (QM),the diffusion behaviour on the Fe-Cu interface of copper brazed double-wall steel tubes and the microstructure of the diffusion layer have been investigated.There are three kinds of metallurgical bonds between copper plating layer and steel substrate: (1)the Cu diffusing into steel substrate along grain boundary of ferrite;(2)the Cu diffusion into grain bulk of ferrite: (3)the Fe diffusing into Cu layer.The copper brazed double-wall steel tubes are formed by the combination of the diffusions mentioned above and this is the reason for excellent mechanical and technological properties of the copper brazed double-wall steel tubes.
AN EXPERT SYSTEM FOR COMPUTER AIDED ALLOY STEEL DESIGN—ASPRES
CHEN Yu,CHEN Nianyi Shanghai institute of Metallurgy,Academia Sinica,Shanghai,China PENG Ping,KONG Bingyu Iron and Steel Research Institute,Shanghai Baoshan Iron and Steel Complex,Shanghai,China professor,Shanghai Institute of Metallurgy,Academia Sinica,Shanghai,China
金属学报(英文版) , 1993,
Abstract: An alloy steel pattern recognition expert system,ASPRES,has been established for thepurpose of computer aided optimal design of alloy steel in compositions and process pa-rameters,Pattern recognition techniques are used to abstract inner relationship betweenmechanical properties and process variables.The ASPRES uses 2-dimensional graph asvisual knowledge to represent domain expertise of specific object.Forward and back-ward chaining can be utilized by researcher in predicting sample performances or givinghelpful suggestions about the chemical compositions and process parameters accordingto desired properties.
Effects of Nitrogen Concentration on Microstructure and Antibacterial Property of Copper-Bearing Austenite Stainless Steels

Zhixia ZHANG Laizhu JIANG Gang LIN Zhou XU School of Material Science,Engineering,Shanghai Jiao Tong University,Shanghai,China Technology Center,Baoshan Iron & Steel CoLtd,Shanghai,China,

材料科学技术学报 , 2008,
Abstract: Austenite antibacterial stainless steels have been found to have wide applications in hospitals and food indus-tries. In recent years epsilon copper precipitation in antibacterial stainless steels has obtained much research interest due to its antibacterial action. The objective of this study was to determine the effects of nitro-gen concentration on the precipitation of epsilon copper and antibacterial property. Two kinds of austenite antibacterial stainless steels containing copper and different nitrogen concentration (0.02 and 0.08 wt pct, re-spectively) were prepared and the microstructures were characterized by a combination of electron microscopy and thermodynamic analysis. A mathematical expression was deduced to predict the effect of nitrogen con-centration on the activity coefficient of copper, In(fCu/focu)=0.53524 4.11xN-0.48x2N. Higher nitrogen was found to increase the free energy difference of copper concentration distribution between precipitation phase and austenite matrix, stimulate the aggregation of copper atoms from austenite, increase the precipitation amount and consequently enhance the antibacterial property of steel.
CRITICAL VOID-GROWTH STATE AND RELATED FRACTURE TOUGHNESS IN BHW60 STEEL
BHW60钢的临界空穴扩张状态与相关的断裂韧性

ZHOU Li,ZHENG Changqing,LU Zhixian,DING Fulian Northwestern Polyechnical University,Xi'an Iron,Steel Research Institute,Shanghai Baoshan Steel Works,
周利
,郑长卿,卢智先,丁富连

金属学报 , 1993,
Abstract: 用扫瞄电镜在拉伸试样断口心部,测量了BHW60钢在20,-60,-100和-140℃下的临界空穴扩张比R_e/R_o,研究了它与宏观断裂韧性V_GC的关系以及热处理状态的影响结果表明:(1)同一温度下R_e/R_o的测量值大致遵循正态概率分布;(2)R_e/R_o随着温度降低直线减小; (3)R_e/R_o与V_GC的关系为V_GC=Cln(R_e/R_o),其中C≈3.5,与R—T空穴扩张模型符合得较好,H与温度和热处理状态无关
A REVIEW OF CHROMATE - FREE PASSIVATION TREATMENTS FOR ZINC OR ZINC ALLOY GALVANIZED- STEEL
镀锌(合金)钢板无/低铬钝化技术研究状况

QIAN Yu-hai,DAI Yi-gang,CHEN Hong-xing,HU Fan,LI Zi-gang Baoshan Iron,Steel Co Ltd,Technology Center,Shanghai,
钱余海
,戴毅刚,陈红星,胡凡,李自刚

腐蚀科学与防护技术 , 2004,
Abstract: Chromate conversion coatings produce a good corrosion resistance on zinc.However,because of the toxicity of chromate,the pressure to move away from passivation processes based on chromate is becoming ever more intense.Selection of alternatives to hexavalent chromium is of prime importance.The chromate-free passivation technique and its development on zinc or zinc alloy galvanized-steel is reviewed.
Deformation and fracture characteristics of ferrite/bainite dual-phase steels
铁素体/贝氏体双相钢的变形和断裂特性

CAI Minghui~ DING Hua~ ZHANG Jiansu~ LI Long~ TANG Zhengyou~ School of Materials,Metallurgy,Northeastern University,Shenyang Technology Center,Baoshan Iron & Steel Group Co,Shanghai National Institute for Materials Science,Japan,Tsukuba -,
蔡明晖
,丁桦,张建苏,李龙,唐正友

材料研究学报 , 2009,
Abstract: The deformation and fracture characteristics of a low carbon Si–Mn steel with ferrite/bainite dual–phase structure were investigated by thermo–mechanical controlled process (TMCP). The results showed that the curves of the instantaneous work–hardening factor n* value versus true strain ε are made up with three stages during uniform plastic deformation: n* value is relatively higher at stage I, decreases slowly with ε in stage II, and then decreases quickly with ε in stage III. Compared tothe equiaxed ferrite/bainite dual–phase steel, the quasi–polygonal ferrite/bainite dual–phase steel shows higher tensile strength and n*value in the low strain region. The voids or micro–cracks formed not only at ferrite–bainite interfaces but also within ferrite grains in the necked region, which can improve the property of resistance to crack propagation by reducing local stress concentration of the crack tips.
STRUCTURAL RELAXATION AS THE ORIGIN OF MAGNETIC PERMEABILITY DECAY IN AMORPHOUS ALLOY Fe_(76)Si_(10)B_(14)

ZHANG Yanzhong Shanghai Iron,Steel Research Institute,

金属学报 , 1985,
Abstract:
THREE NEW Fe-BASED MICROCRYSTALLINE ALLOYS WITH SUPERIOR MAGNETIC PROPERTIES
ZHANG Yanzhong,NIAN Suzhen Shanghai Iron,Steel Research Institute,
ZHANG Yanzhong
,NIAN Suzhen Shanghai Iron and Steel Research Institute

金属学报(英文版) , 1992,
Abstract: Three new Fe-based microcrystalline alloys,i.e.,Fe_(73.1)Cu_(1.2)Nb_(3.2)Si_(12 5)B_(10),Fe_(73)Cu_1Nb_(1.5)Mo_2Si_(12.5)B_(10) and Fe_(73)Cu_1Zr_3C_(0.5)Mo_Si_(12.5)B_(10),were developed with su-perior magnetic properties.e.g.,high relative initial permeability of μ_i~15×10~4,lowcoercivity of H_c1.0A/m,high effective permeability and low core losses in a consid-crable wide frequency range and high pulse-magnetic permeability under narrow pulse.The optimum value of relative effective permeability,μ_5~1 is 16×10~4 under condition off=1 kHz and H_m=0.4 A/m.The optimum values of core loss reach 57.9 30.2 and 68W/kg under condition of f=50.100.100 KHz and B_m=0.5,0.2,0.3 T,respectively.These three alloys have superior stability of magnetic properties.Initial permeabilitymay be not changed during heating at 130℃ up to 216 h.The main crystalline phaseis ordered phase Fe_((75)+y)Si_((25)-y) which is ultrafine particles of average size 10—20 nm.
EVALUATION OF PERMEABILITY STABILITY OF SEVERAL AMORPHOUS FERROMAGNETIC ALLOYS
几种非晶态铁磁合金的磁导率稳定性的估计

ZHANG Yanzhong Shanghai Iron,Steel Research Institute ZHANG Yanzhong senior engineer,Steel Research Institute,Shanghai Measuring,Testing Centre,Shanghai Iron and,
张延忠

金属学报 , 1989,
Abstract: 本文根据非晶态铁磁合金的磁导率衰减动力学的实验数据得到的经验公式,利用平均激活能和频率因子的实验值估计了预退火的非晶合金Fe_(76)Si_(10)B_(14),Fe_(40)Ni_(38)Mo_4B_(18)和(Fe_(0.1)Ni_(0.35)Co_(0.55))_(78)Si_8B_(14)的起始磁导率的相对稳定程度。计算结果表明,虽然不能实质上消除磁导率的不稳定性,但是大约在不超过100℃的温度范围内,磁导率相对稳定程度对实际应用是足够的。换句话说,在相当长时间内,磁导率衰减相当小。
THREE NEW Fe-BASED MICROCRYSTALLINE ALLOYS WITH SUPERIOR MAGNETIC PROPERTIES
具有优良磁性能的新型铁基微晶合金的研究

ZHANG Yanzhong,NIAN Suzhen Shanghai Iron,Steel Research Institure Correspondent,senior,engineer,Shanghai Iron,Steel research Institute,Shanghai,
张延忠
,年素珍

金属学报 , 1992,
Abstract: 本文报道三种新型铁基微晶合金Fe_(73)Cu_(1.2)Nb_(3.2)Si_(12.5)B_(10)(合金1),Fe_(73.1)Cu_1Nb_(1.5)Si_(1.25)B_(10)(合金2)及Fe_(73)Cu_1Zr_3C_(0.5)Si_(12.5)B_(10)(合金3),它们具有μ'_i≥5×10~4的高相对起始磁导率、Hc≤1.0A/m的低矫顽力、在相当宽频率范围内的高有效磁导率、低铁芯损耗和窄脉冲条件下的高脉冲磁导率。在f=1kHz和H_m=0.4A/m条件下,相对有效磁导率μ’_5的最佳值为16×10~4,超过了Yoshizawa报道的μ’_5=10×10~4。最佳铁损值为P_(5/50k)=57.9W/kg、P_(2/100k)=30.2W/kg和P_(3/100k)=68W/kg,也超过了Yoshizawa报道的P_(2/100k)=38.9W/kg。这些合金都具有优良的磁性稳定性;在130℃下保温216h后起始磁导率不变,合金的主晶相是Fe_(75+y)Si_(25-y)型有序固溶体,晶粒的平均直径为10~20nm。
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