钢铁
Home
|
About Journal
|
Editorial Board
|
Instruction for Authors
|
Subscriptions
|
Advertisement
|
Contacts Us
|
Chinese
Office Online
Author Center
Peer Review
Editor Work
Office Work
Editor-in-chief
Journal Online
Forthcoming Articles
Current Issue
Archive
Read Articles
Download Articles
Email Alert
Quick Search
Advanced Search
2008 Vol. 43 No. 5
Published: 2008-05-15
综合论述
1
XU Jianyong
About Selection of Strip Cold Rolling Mill
With consideration of product mix, steel grade,varieties of products,production capacity, flatness control performance and the rationality of investment, choosing the right type of strip cold rolling mill and the configuration of the units are discussed. The development trend is also analysed based on 46 cold mills built in the world after 1980.
2008 Vol. 43 (5): 1-0 [
Abstract
] (
2448
) [
HTML
0KB] [
PDF
0KB] (
101
)
原料与炼铁
7
WU Shengli;SUN Guolong;LIU Peixiao;HAO Zhizhong;HAN Hongliang
Study on SelfCharacteristic and Rational Use Technique of Series of Ores in Baiyunebo
Baiyunebo iron ores from two different ore bodies are main raw material for Baotou I&R Co.. For these ores, the chemical composition was analyzed, size distribution was measured,mineral type and agglomeration characteristic at high temperature were studied. The rational technique for optimizing product structure of mine and improving the quality of sinters and pellets is suggested.
2008 Vol. 43 (5): 7-0 [
Abstract
] (
2605
) [
HTML
0KB] [
PDF
0KB] (
100
)
12
XU Hui;ZOU Zongshu;YU Aibing;
A Preliminary Numerical Simulation of Midrex Reduction Shaft Furnace
Based on the mass and energy balance of gas and solid phases, a onedimensional model of Midrex reduction process was developed. The model was able to satisfactorily reproduce the data from Gilmore Steel Corporated. Calculated results showed that, the temperature difference between solid and gas phases is small in the most part of reduction section of Midrex shaft furnace. The reactions are exothermal in the upper part of 1.18 meter in depth. The performance of the reactor was also analyzed under different temperature of reduction gas,gas flow rate,size of iron ore pellet and productivity of the reactor.
2008 Vol. 43 (5): 12-0 [
Abstract
] (
3425
) [
HTML
0KB] [
PDF
0KB] (
111
)
18
ZHANG Jinzhu;DENG Hailiang;AO Wanzhong;ZHAO Yueping
Influence of SiO2 and FeO Contents in Charge on Sinter Strength
The influence of composition of charge on sinter strength was studied by means of tumbling test, optical microscopy and Xray diffraction (XRD). The samples were prepared with sintering cup, and the production trial was conducted on Shuigang 65 m2 sintering machine based on the experimental results. It was shown that the SiO2 content has a major effect on the sinter strength. When the SiO2 content was 5.375.67%, the sinter had a higher strength.Both the MgO and FeO contents have some effect on the sinter strength. While the SiO2 content was 4.845.00%, the calcium ferrite was formed by decreasing both w(MgO) and w(FeO) and the sinter strength was improved.
2008 Vol. 43 (5): 18-0 [
Abstract
] (
4510
) [
HTML
0KB] [
PDF
0KB] (
111
)
炼钢
22
LI Donggang;CHI Hebing;SHAO Shijie
Analysis of AOD Top Lance Blowing Process at Baosteel
It was shown that during AOD refining with side and top blowing the decarburization speed was slower, the oxidation of chromium was a little bit severer and the bath heating rate was slower than expected.Thus， based on the simulation results, the oneoutlet top lance was replaced with three outlet lances.The one outlet lance,threeoutlet top lance with 11 degree inclination of outlets and three outlet top lance with 15 degree inclination were compared in terms of decarburization speed,chromium oxidation rate and bath temperature heating rate. The results showed: 1) With reasonable lance position, the three outlet top lance with 11 degree inclination is the most effective; 2) The one outlet top lance is the worst one; 3) The three outlet top lance with 15 degree inclination is not satisfactory due to unfavorable gas streams.
2008 Vol. 43 (5): 22-0 [
Abstract
] (
3197
) [
HTML
0KB] [
PDF
0KB] (
124
)
26
SHEN Chang;SONG Chao;SHU Hongfu;ZHANG Xiaofeng
Research of ULC Steel Production Route Combining RHLF Refining and CSP Line
The necessity of utilizing RHLF refining to produce ultra low sulfur and ULC steel for CSP line and controlling carbon and nitrogen content during deep desulfurization is described. The mass production of DDQIF steel in such a way can be realized with a maximum sequence casting heats of 12, with satisfactory quality of final products.
2008 Vol. 43 (5): 26-0 [
Abstract
] (
2672
) [
HTML
0KB] [
PDF
0KB] (
99
)
30
DUAN Mingnan;FENG Changbao;YANG Jianhua;YUAN Wei;YANG Ke
Thermal and Mechanical Couple Stress Analysis of Mould Copper for Slab Continuous Casting
With thermocouples set on the back of mold copperplate, the temperature distribution was measured.Considering the change of physical parameters of liquid steel,strand,copper and media on interface with temperature, the dynamic temperature field and couplestress of mould copper in range of threerow thermocouples were simulated by FEA soft ANSYS. The results provided a good reference for copper stress distribution and defect analysis.
2008 Vol. 43 (5): 30-0 [
Abstract
] (
2336
) [
HTML
0KB] [
PDF
0KB] (
104
)
35
LIU Shihong;WANG Xinhua;DAI Guanwen;LIANG Mei;LI Hong
Investigation on NonMetallic Inclusions in Hot Forging Steels of High Cleanliness
The Nonmetallic inclusions in hot forging structure steels during LF refining of which T［O］ was less than 0.0010%,were investigated. It was found that,with high basicity slag and strong diffusion deoxidation, the high Al2O3 inclusions formed by Al deoxidation were transformed into magnesium and calcium aluminates. For the steels with T［O］ below 0.0010% after VD degassing, it was difficult to find oxide inclusions in the steel. In high clean hot forging steels, many combined inclusions were found, in which, the central part was MnS, while the edge parts was TiN precipitated on the existed MnS particles.
2008 Vol. 43 (5): 35-0 [
Abstract
] (
2862
) [
HTML
0KB] [
PDF
0KB] (
109
)
40
LIU Xinsheng;ZHAO Dingguo;CUI Chengye
Research of Lamination on ColdRolled Strip
The lamination or “bubbling” on strip is occurred during cold rolling.The samples were studied by metallorgraphy and electron microscopy.With Scheil equation,the excess oxygen content of steel during solidification was caculated,which causes the precipitation of FeO inclusions at grain boundaries.In rolling,the continuity of steel is damaged causing lamination.Strong deoxidation and protective casting can reduce oxygen content avoid the stratified phenomenon.
2008 Vol. 43 (5): 40-0 [
Abstract
] (
3468
) [
HTML
0KB] [
PDF
0KB] (
130
)
压力加工
44
DENG Tianyong;XU Yunbo;WU Di;LIU Xianghua;WANG Guodong
Prediction of Recrystallization and MFS of X65 During Production by TSCRD
Based on temperature field simulated with finite element difference method, the 2D microstructure evolution and distribution profile was predicted and a model of mean flow stress with consideration of austenite grain size and recrystallization, and a technology of grain refinement rolling were put forward. There is only a little recrystallization due to low temperature during last several passes of finishing,so the austenite grain size can be refined by increasing reduction on first two passes of finishing or reducing temperature before finishing.
2008 Vol. 43 (5): 44-0 [
Abstract
] (
2682
) [
HTML
0KB] [
PDF
0KB] (
138
)
51
YU Bin;YUE Xiaoli;SHE Guangfu;LIAN Jiachuang;LIU Hongmin
MultiObjective Optimization Design and Application of BackUp Roll Contour for Hot Strip Mill
In order to improve service life of roll and control of strip flatness in hot rolling production，a multiobjective optimization design for backup roll contour was established based on production conditions and strip flatness control theory. Simulated calculation and production experiment showed that contact pressure distribution between rolls is evened; uneven wear of roll body is reduced; edge spalling of roll surface is prevented; and control effect of strip flatness is improved.The optimization roll contour is valuable and worth further spreading.
2008 Vol. 43 (5): 51-0 [
Abstract
] (
2627
) [
HTML
0KB] [
PDF
0KB] (
108
)
55
SU Yanping;YANG Quan;HE Anrui;WANG Xiaodong;BIAN Haitao
Calculation of Thermal Stress Affecting Strip Flatness During RunOut Table Cooling of ASP 1700 Strip Mill
A numerical analysis of the thermal stress generated during cooling of hot rolled strip on runout table of ASP1700 was performed by means of finite element program ABAQUS.For studying trend of flatness change during cooling of strip.The results demonstrated that temperature drop at strip edges leads to a residual stress distribution pattern with tensile at strip center and compressive stress at edges.Thus a trend of edge wave formation is observed as proved by the practice of skin pass rolling.A compensation control strategy, named slight center wave rolling, was proposed based on the FE analysis work to compensate the edge wave during the cooling, and adopted on ASP1700. The validity of this control strategy was confirmed by the practice.
2008 Vol. 43 (5): 55-0 [
Abstract
] (
2530
) [
HTML
0KB] [
PDF
0KB] (
123
)
61
ZHU Fuwen;HU Xianlei;ZHAO Zhong;LIU Xianghua
Analysis of Long Ear Disfigurement of Plate
In order to forecast the long ear disfigurement of plate with high precision, and correlate parameters of plan view control, on the base of theoretical analysis,the conception of tiny cell was brought forward,a forecasting model of long ear disfigurement was built. Using volume conversation law, the model proved that volume of long ear is formed from the tiny cells at the head, and it is best to use long ear volume at 0.2 times width of rolled piece from the edge as identification index of long ear disfigurement.The identification index then was uncoupled into the product of elongation percentage and length of tiny cells at the head.With quantitative model of tiny cells at the head,a forecasting model of long ear disfigurement was obtained. The model was applied to a 3000 mm plate mill,with good effects.
2008 Vol. 43 (5): 61-0 [
Abstract
] (
2466
) [
HTML
0KB] [
PDF
0KB] (
50
)
钢铁材料
66
ZHAO Haimin;HUI Weijun;NIE Yihong;DONG Han;WENG Yuqing;
Effect of Inclusion Size on HighCycle Fatigue Behavior of High Strength Spring Steel
The high cycle fatigue fracture behavior of three heats commercial spring steels 60Si2CrVA were studied by using rotating bar twopoint bending fatigue machine in the highcycle regime up to 107 cycles. The experimental results indicated that there is significant difference in the fatigue properties of steels, with same oxygen content. Further investigation revealed that this difference is mainly caused by the difference in inclusion size. That means, both fatigue life and fatigue strength increase with decreasing inclusion size. For D60, in which the average inclusion size is 44.4 μm the SN curve displays a continuous decline without conventional limit and fatigue failures originated mainly from large oxide inclusions.For A60,which has the smallest inclusion size of about 15.4 μm, all the fatigue cracks except two did not initiate from inclusions but from specimen surface and there was conventional limit. In the case of internal inclusioninduced fracture at cycles beyond 1×106, inclusions were found inside the fisheye and granular bright facets (GBF) were observed in the vicinity of inclusions.
2008 Vol. 43 (5): 66-0 [
Abstract
] (
2484
) [
HTML
0KB] [
PDF
0KB] (
98
)
71
CAI Dayong;DONG Haifeng;LIAO Bo;CHEN Libin;SHI Dongri
Experimental Study of Ferrite Rolling of a Low Carbon Steel
Low carbon steel strip is produced by ferrite rolling on Flexible Thin Slab Rolling Production Line (FTSR) at Tangshan Iron & Steel Group Co., Ltd. The mechanical properties, microstructure and texture of the strip were studied. The results showed that the microstructure of the strip is characterized by full recrystallized ferrite, of about 30 μm in grain size, and small amount of pearlite. Compared with the strip produced by conventional austenite rolling, the yield strength of the ferrite rolled strip was lower by about 20%,with same elongation and strain hardening exponent. The plastic strain ratios were 0.76,0.35 and 0.70 in transverse direction, longitudinal direction, and 45° direction respectively.The dynamic strain aging of low carbon steel is the main reason of low plastic strain ratios value of the ferrite rolled strip.
2008 Vol. 43 (5): 71-0 [
Abstract
] (
2596
) [
HTML
0KB] [
PDF
0KB] (
127
)
75
LI Yong;WANG Chunxu;TIAN Zhiling;LIU Xianmin;ZHANG Jinghai
Investigation on Microstructure and Mechanical Properties of a Low Alloyed UltraHigh Strength Steel
With ThermoCalc software the equilibrium phases of a low alloyed ultrahigh strength steel 30Cr3 for engine case were studied. By mechanical test, transmission electron microscopic(TEM), scanning electron microscopic (SEM) and XRD observation the performance of 30Cr3 steel was investigated. The results showed that at room temperature the structure components of 30Cr3 steel after equilibrium phase transformation are αFe and carbides (MC、M23C6、M7C3). 30Cr3 steel has good hardenability after normalization,of which microstructure is mainly martensite.During tempering εcarbide is precipitated in martensite laths.The tension strength and yield strength of 30Cr3 steel first rise up with a max.Tension strength of 1870 MPa at 250 ℃, then decline with tempering temperature; the impact energy and fracture toughness decline with increase of tempering temperature.
2008 Vol. 43 (5): 75-0 [
Abstract
] (
3340
) [
HTML
0KB] [
PDF
0KB] (
97
)
80
DONG Hao;ZHAO Yu;YU Xiaojun;LIAN Fazeng
Effect of Secondary Cold Rolling Reduction Rate on Magnetic Properties and Texture of Thin NonOriented Electrical Steel Sheets
The effect of cold rolling reduction rate on magnetic properties and texture of thin nonoriented electrical steel sheets were researched. The results showed that thin nonoriented electrical steel sheets with better magnetic properties could be produced with 55% reduction rate of secondary cold rolling. The portion of unfavorable γtexture components, especially {111}<112> and {111}<110> was increased when the rate of secondary cold rolling reduction was higher than 55%.The thin nonoriented electrical steel sheets manufactured with a rate of secondary cold rolling reduction of 55% had more {100} and Goss texture,and of which P1.0/400 could be reduced to 10.6 W/kg and B50 could reach to 1.68 T.
2008 Vol. 43 (5): 80-0 [
Abstract
] (
2574
) [
HTML
0KB] [
PDF
0KB] (
130
)
环保与能源
84
HU Changqing;ZHANG Chunxia;YIN Ruiyu
ByProduct Gases Utilization Mode and EcoIndustrial Transformation Conception for New Generation Steel Plant
Balance and utilization modes for byproduct gases of new generation steel plant and approaches to form ecoindustrial chains with power generation, cement industry and petrochemical industry are analysed. For a new generation steel plant of 9 Mt per year in capacity a power station of 900 MW could be built to realize electricity selfsupply and to play the function of energy conversion through full utilization of byproduct gases and integration to power generation, a cement plant of 3.5 Mt/a Portland cement and 800 kt/a cement fine could be constructed to chain with cement industry through recycling of metallurgical slag, and to provide 660 Mm3/a hydrogen for petrochemical industry to form ecoindustrial chain or for automobile as clean fuel to realize ecoindustrial transformation and to adapt and promote the development of circulative economy in China.
2008 Vol. 43 (5): 84-0 [
Abstract
] (
2580
) [
HTML
0KB] [
PDF
0KB] (
67
)
89
SHI Jie;WANG Deren;HE Yedong;QI Huibin
Study on Reduction of Oxide Scale on BRC3 HotRolled Steel Strip by Carbon Monoxide
Oxide scale on BRC3 hotrolled steel strip was investigated by scan electronic microscopy and Xray diffraction. The results showed that oxide scale consists of outmost hematite layer, intermediate magnetite layer and inner wustite layer.And a small amount of magnetite precipitates in wustite layer. During hightemperature reduction, all iron oxides are entirely transformed into wustite,then reduced by carbon monoxide. Finally a composite of white porous iron and some grey wustite is formed. It was found that the optimum parameters of reduction were:temperature was 750 ℃，carbon monoxide flow rate was 3 L/min and reaction time was 180 s.And the higher carbon monoxide flow rate,the higher reduction rate is.
2008 Vol. 43 (5): 89-0 [
Abstract
] (
2804
) [
HTML
0KB] [
PDF
0KB] (
107
)
装备与控制
93
R.Wechsler;P.Campbell;W.Blejde;R.Mahapatra;G.Gillen
Startup and Operation of Castrip Process at Nucor Crawfordsville
Some of the key process technologies of Castrip and details of first installation at Crawfordsville are described.Physical properties of typical Castrip products are discussed.
2008 Vol. 43 (5): 93-0 [
Abstract
] (
2309
) [
HTML
0KB] [
PDF
0KB] (
97
)
技术交流
96
WU Kangmian;CHENG Xiaojun;CHEN Xingguo;ZHOU Feng
Research on Yield Strength of ColdRolled Annealed and SkinPassed Steel Strip From CSP Hot Coil
The fact,that the yield strength of coldrolled, annealed, skinpassed strip produced from CSP hot coil is higher than expected is observed, which causes lower formability. Systematical research was done on recrystallization behavior, annealing and skinpass technology, coiling tension of TCM, hot rolling technology and chemical composition. Problems of high hardness and cracking during drawing were solved for CQ, DQ grade products.
2008 Vol. 43 (5): 96-0 [
Abstract
] (
3095
) [
HTML
0KB] [
PDF
0KB] (
126
)
101
ZHU Tao;PEI Chenxin;DONG Mei;SHENG Chang
Production of SemiProcessed NonOriented Electrical Steel With TSCR
The semiprocessed nonoriented electrical steel 50WB560 was successfully produced in batch by BOF, RH， LF,thinslab continuous casting and rolling (TSCR),first coldrolling, batchannealing and second coldrolling route. The results indicated that 50WB560 has P1.5/50 3.2 W/kg;B50 1.72 T, and the better satisfactory shape and surface quality,which is good for manufacture of highefficiency motors.
2008 Vol. 43 (5): 101-0 [
Abstract
] (
2764
) [
HTML
0KB] [
PDF
0KB] (
83
)
钢铁
News
·
·
·
·
·
More
Author Center
Instruction for Authors
Template
Copyright Agreement
Links
·
Links
More
Copyright © IRON AND STEEL
Supported by: Beijing Magtech
