钢铁研究学报(英文版)
首页
期刊介绍
编 委 会
投稿指南
期刊订阅
广告服务
留言板
联系我们
English
在线办公平台
在线期刊
当期目录
论文检索
过刊浏览
论文下载排行
论文点击排行
Email Alert
文章快速检索
高级检索
2011年 18卷 9期
刊出日期：2011-09-15
材料
工艺
工艺
1
CAO Yong-guo,WU Sheng-li,HAN Hong-liang,WANG Hong-wei,XUE Fang,LIU Xiao-qin
Mixed State and High Effective Utilization of Pilbara Blending Iron Ore Powder
Pilbara blending iron ore powder (PB powder) is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively, such as the macroscopic properties, microscopic properties, and high-temperature properties; the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was further validated through the sintering pot test and industrial production. The results show that: PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45%.
2011 Vol. 18 (9): 1-5 [
摘要
] (
2640
) [
HTML
0KB] [
PDF
0KB] (
14
)
6
YANG Wen,CAO Jing,WANG Xin-hua,XU Zhi-rong,YANG Jie
Investigation on Non-Metallic Inclusions in LCAK Steel Produced by BOF-LF-FTSC Production Route
The behavior of non-metallic inclusions in LCAK (low carbon aluminum killed) steel produced by BOF (basic oxygen furnace)-LF (ladle furnace) refining-FTSC (flexible thin slab continuous caster) production route was investigated. The results showed that, LF refining for LCAK steel could decrease the wT[O] significantly, and the inclusions were modified by Ca treatment, which prevented nozzle clogging efficiently. However, owing to the unstable casting condition in the earlier stage of casting, a severe reoxidation occurred, accompanied with mold slag entrapment. The transformation of non-metallic inclusions during the steelmaking process was Al2O3→MgO-Al2O3 type inclusion→MgO-Al2O3-CaO type inclusion with a CaS ring, and the mechanism of the transformation was proposed and discussed via thermodynamic and kinetic analysis. Besides, to avoid CaS precipitation, the product of w2[Al]×w3[S] in steel should be less than 2.0×10-10 at 1873 K, which remands higher desulfurization ratio during LF refining.
2011 Vol. 18 (9): 6-12 [
摘要
] (
2254
) [
HTML
0KB] [
PDF
0KB] (
56
)
13
HE Chun-lai,ZHU Rong,DONG Kai,QIU Yong-quan,SUN Kai-ming
Modeling of an Impinging Oxygen Jet on Molten Bath Surface in 150 t EAF
A transient three-dimensional mathematical model has been developed to analyze the three-phase flow in a 150 t EAF (electric arc furnace) using oxygen. VOF (multiphase volume of fluid) method is used to simulate the behaviors of molten steel and slag. Numerical simulation was conducted to clarify the transient phenomena of oxygen impingement on molten bath. When oxygen jet impinges on the surface of molten bath, the slag layer is broken and the penetrated cavity in molten steel is created. Simultaneously, the wave is formed at the surface of uncovered steel on which the slag layer is pushed away by jet. The result of numerical simulations shows that the area and velocity of uncovered steel created by impingement, jet penetration depth change from 0.10 m2, 0.0125 m/s, 3.58 cm to 0.72 m2, 0.1445 m/s, 11.21 cm, when the flow rate of an oxygen lance varies from 500 to 2000 m3/h. The results have been validated against water model experiments. More specially, the relation between the penetration depth and oxygen flow rate predicted by numerical simulation has been found to agree well with that concluded by water model.
2011 Vol. 18 (9): 13-20 [
摘要
] (
2175
) [
HTML
0KB] [
PDF
0KB] (
21
)
21
QIN Jian,,ZHANG Qing-dong,HUANG Ke-fu
Oblique and Herringbone Buckling Analysis of Steel Strip by Spline FEM
The tilted waves in steel strip during rolling and leveling of sheet metal can be classified into two different types of buckling, oblique and herringbone buckling, respectively. Numerical considerations of oblique and herringbone buckling phenomena are dealt with by the spline finite element method (FEM). It is pointed out that the shear stress due to residual strains caused by the rolling process or applied non-uniform loading is the main reason of oblique and herringbone buckle. According to the analysis of stress distribution in plane, the appropriate initial strain patterns are adopted and the corresponding buckling modes are calculated by the spline FEM. The developed numerical model provides an estimation of buckling critical load and wave configuration.
2011 Vol. 18 (9): 21-26 [
摘要
] (
2274
) [
HTML
0KB] [
PDF
0KB] (
23
)
27
ZHANG Yun,YANG Quan,WANG Xiao-chen
Control Strategies of Asymmetric Strip Shape in Six-High Cold Rolling Mill
It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile. To reduce asymmetric defects of strip shape as much as possible, some control strategies were proposed, including tilting and asymmetric bending of intermediate roll and work roll. The combinations of these three control strategies can effectively eliminate asymmetric strip shape defects. Finally, the closed-loop control model of asymmetric flatness at the last stand was given, and the flatness control system with the function of asymmetric strip shape control was also designed for cold tandem mill.
2011 Vol. 18 (9): 27-32 [
摘要
] (
2683
) [
HTML
0KB] [
PDF
0KB] (
36
)
材料
33
S Narayan,A Rajeshkannan
Influence of Carbon Content on Strain Hardening Behaviour of Sintered Plain Carbon Steel Preforms
Complete experimental investigation on the instantaneous strain hardening behaviour of powder metallurgy (P/M) preforms of pure iron, Fe-0.35%C, Fe-0.75%C and Fe-1.1%C was carried out. The strain hardening behaviour of the above-mentioned P/M sintered steel preforms with aspect ratio of 0.4 under triaxial stress state condition was determined by cold upsetting under nil/no and graphite lubricant conditions. The instantaneous strain hardening value (ni), strength coefficient (Ki), and the stress as a function of strain and densification were obtained and analyzed. Furthermore, a relation was obtained from a semi-log plot of stress against relative density and analyzed to study the hardening behaviour owing to densification as stress was a function of induced strain as well as densification in the P/M materials.
2011 Vol. 18 (9): 33-40 [
摘要
] (
1927
) [
HTML
0KB] [
PDF
0KB] (
17
)
41
MA Zheng-huan,ZHAO Xiang-juan,GE Chang-sheng,DING Tie-suo,LI Jun,XIAO Xue-shan
A New Resource-Saving, High Chromium and Manganese Super Duplex Stainless Steels 29Cr-12Mn-2Ni-1Mo-xN
A new family of resource-saving, high chromium and manganese super duplex stainless steels (DSSs), with a composition in mass percent, % of Cr 0.29, Mn 0.12, Ni 2.0, Mo 1.0, and N 0.51-0.68, has been developed by examining the effect of N on the microstructure, mechanical properties and corrosion properties. The results show that these alloys have a balanced ferrite-austenite relation. The austenite volume fraction decreases with the solution treatment temperature, but it increases with an increase in N content. The increases in nitrogen enhance the ultimate tensile strength (UTS) and reduce the ductility of the material slightly. The pitting corrosion potential increases first and then decreases with an increase in nitrogen content when the amount of N arrives to 0.68%. The yield stress and ultimate tensile strength of solution-treated samples were more than 680 and 900 MPa, the elongation of experimental alloys are higher than 30%, respectively, what is more, the pitting potentials were beyond 1100 mV.
2011 Vol. 18 (9): 41-46 [
摘要
] (
2363
) [
HTML
0KB] [
PDF
0KB] (
37
)
47
XIA Zhi-xin,ZHANG Chi,HUANG Qun-ying,LIU Shao-jun,LI Zhao-dong,YANG Zhi-gang
Effect of TaC Particles Dissolution on Grain Coarsening in Reduced Activation Steels
The effect of TaC on grains and packets coarsening in the reduced activation ferritic/martensitic (RAFM) steels was investigated. It was found that the combined effect of the austenitizing temperature and heating rate resulted in the heterogeneous austenite grain growth. When the austenitizing temperature was raised above 1423 K, the TaC particles disappeared, and the homogenous grains abruptly increased. The thermodynamic model for dissolution of TaC particles during austenitizing was applied to interpret the results.
2011 Vol. 18 (9): 47-52 [
摘要
] (
1968
) [
HTML
0KB] [
PDF
0KB] (
42
)
53
D Senthilkumar,I Rajendran
Influence of Shallow and Deep Cryogenic Treatment on Tribological Behavior of En 19 Steel
The influence of cryogenic treatment on the wear resistance of En 19 steel was studied. Furthermore, a comparative analysis on the effect of Deep Cryogenic Treatment (DCT, -196 ℃×24 h), Shallow Cryogenic Treatment (SCT, -80 ℃×5 h) and Conventional Heat Treatment (CHT) was done through dry sliding wear testing. The microstructures of CHT, SCT and DCT samples were also examined through scanning electron microscopy. The results indicated that the wear resistance of shallow and deep cryogenically treated samples is higher when compared to that of conventionally treated samples. X-ray diffraction pattern revealed that the transformation of retained austenite into martensite is responsible for the wear resistance improvement.
2011 Vol. 18 (9): 53-59 [
摘要
] (
2556
) [
HTML
0KB] [
PDF
0KB] (
25
)
60
ZHU Kai,,YANG Jian,WANG Rui-zhi,YANG Zhen-guo
Effect of Mg Addition on Inhibiting Austenite Grain Growth in Heat Affected Zones of Ti-Bearing Low Carbon Steels
To study the effect of Mg addition on inhibiting weld heat affected zones (HAZ) austenite grain growth of Ti-bearing low carbon steels, two steels with and without Mg treated were prepared using a laboratory vacuum. The welding testing was simulated by Gleeble 3500 thermomechanical simulator. The performance of HAZ was investigated that the toughness was improved from 33 to 185 J by adding 0.005% Mg (in mass percent) to the steel, and the fracture mechanism changed from cleavage fracture to toughness fracture. Through in-situ observation by a confocal scanning laser microscope, a significant result was found that the austenite grain of the steel with Mg treated was still keeping fine-grained structure after holding at 1400 ℃ and lasting for 300 s. This inhibition of austenite grain growth was mainly attributed to the formation of pinning particles after the addition of Mg. The obtained results propose a potential method for improving HAZ toughness of structure steels.
2011 Vol. 18 (9): 60-64 [
摘要
] (
2017
) [
HTML
0KB] [
PDF
0KB] (
62
)
65
M Yousefieh,M Shamanian,A Saatchi
Influence of Heat Input in Pulsed Current GTAW Process on Microstructure and Corrosion Resistance of Duplex Stainless Steel Welds
The high corrosion resistance of duplex stainless steel (DSS) is due to elements such as Cr, Mo and N, but also depends on the microstructure. The best general properties are obtained with approximately equal amounts of austenite and ferrite and the absence of third phases such as σ (sigma) and Cr2N. In the present work the effect of heat input variations on the microstructure and corrosion resistance of a DSS UNS S32760 in artificial sea water media were studied. The corrosion resistance in 3.5% of NaCl solution was evaluated by potentiostatic polarization tests at room temperature. It is found that the presence of sigma phase and Cr2N decreases the corrosion potential. The specimen with heat input of approximately 0.95 kJ/mm have the best corrosion characteristics, which is the result for the lack of deleterious phases such as sigma and Cr2N and balanced ferrite-austenite proportion.
2011 Vol. 18 (9): 65-69 [
摘要
] (
2160
) [
HTML
0KB] [
PDF
0KB] (
22
)
70
Fatih Hayat
Comparing Properties of Adhesive Bonding, Resistance Spot Welding, and Adhesive Weld Bonding of Coated and Uncoated DP 600 Steel
Zinc coated dual phase 600 steel (DP 600 grade) was investigated, utilisation of which has gradually increased with each passing day in the automotive industry. The adhesive bonding (AB), resistance spot welding (RSW), and adhesive weld bonding (AWB) joints of the zinc coated DP 600 steel were investigated. Additionally, the zinc coating was removed using HCL acid in order to investigate the effect of the coating. The microstructure, tensile shear strengths, and fracture properties of adhesive bonding (AB), resistance spot welding (RSW), and adhesive weld bonding (AWB) joints of the coated and uncoated DP 600 steel were compared. In addition, a mechanical-electrical-thermal coupled model in a finite element analysis environment was utilised. The thermal profile phenomenon was calculated by simulating this process. The results of the tensile shear test indicated that the tensile load bearing capacity (TLBC) values of the coated specimens among the three welding methods were higher than those of the uncoated specimens. Additionally, the tensile strength of the AWB joints of the coated and uncoated specimens was higher than that of the AB and RSW joints. It was determined that the fracture behaviours and the deformation caused were different for the three welding methods.
2011 Vol. 18 (9): 70-78 [
摘要
] (
2326
) [
HTML
0KB] [
PDF
0KB] (
21
)
钢铁研究学报(英文版)
编辑部公告
·
《钢铁研究学报》第二届青年编委招募
·
《钢铁研究学报》英文版“极端环境下材料的腐蚀和磨损”专刊征稿启事
·
《钢铁研究学报》英文版“钢铁冶金固废资源化利用”专刊征稿启事
·
《钢铁研究学报》英文版“多相多尺度冶金过程数值仿真”专刊征稿启事
·
《钢铁研究学报》英文版“人工智能在钢铁冶金及材料中的应用”专刊征稿启事
更多
作者指南
投稿须知
论文模板
标准规范
版权协议
读者会员登录
友 情 链 接
更多
版权所有 © 《钢铁研究学报(英文版)》编辑部
地址：北京市海淀区学院南路76号 邮政编码：100081
