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
2009年 16卷 6期
刊出日期：2009-11-15
材料
工艺
工艺
1
Sheng-fu ZHANG Liang-ying WEN Chen-guang BAI Gui-bao QIU Feng WANG
Cold Model Study of Coal Gas Component Concentration Distribution in Blast Furnace Raceway
Primary distribution of coal gas in blast furnace raceway has an important effect on combustion of coke and pulverized coal injection, as well as whole ironmaking process. According to practical production parameters of No. 5 blast furnace in Chongqing iron & steel Co. LTD, the theoretical calculation model recommended by Nomura is adopted to determine penetration depth, height and width of raceway. Three-dimensional cold model of blast furnace raceway is established. Coal gas component concentration distribution of vertical section and cross section in blast furnace raceway is simulated using natural gas.
2009 Vol. 16 (6): 1-6 [
摘要
] (
2147
) [
HTML
0KB] [
PDF
0KB] (
21
)
7
LI Jie Jian-Hong MA Yu-Lai GAO Qi-jie ZHAI
Columnar to equiaxed transition of metals during solidification by using electric current pulse
A new approach of applying the Electric Current Pulse (ECP) with parallel electrodes to promotion of the transition from columnar to equiaxed crystals and improvement of macrosegregation was introduced. And the experiments of application of ECP in the different stage of solidification have been carried out. The results show that applying ECP in both the initial and the late stage of solidification can promote the columnar to equiaxed transition (CET). Analysis shows that during solidification application of ECP induce a large number of nuclei around the upper surface, which subsequently showers down into the melt and impinges growth front of the columnar crystal. Therefore the CET occurs. In addition, this method is also employed to influence the solidification processing of bearing steel, the results show that the structrue is changed from columnar to equaixed, indicating that ECP can enhance the homogeneity of structure and composition of bearing steel.
2009 Vol. 16 (6): 7-12 [
摘要
] (
2127
) [
HTML
0KB] [
PDF
0KB] (
28
)
13
王根矶 杜海军 赵德文 王国栋
Application of Geometric Midline Yield Criterion for Strip Drawing
In this paper, a new linear yield criterion expressed by the geometric midline of error triangle between Tresca and Twin shear stress yield loci on the π-plane in Haigh-Westergaard space is introduced. The criterion is written in terms of the principal values of stress deviator and called GM yield criterion for short. Together with a Cartesian coordinate velocity field different from Avitzur’s, the GM criterion is used to get a analytical solution for strip drawing .With working example of the strip drawing through wedge-shaped die, the calculated results of relative drawing stress by the GM criterion are compared with those by Mises criterion from Avitzur formula. It turns out that the calculated results according to analytical solution of present paper are in good agreement with the numerical solution by Avitzur formula
2009 Vol. 16 (6): 13-16 [
摘要
] (
2171
) [
HTML
0KB] [
PDF
0KB] (
24
)
17
QIU Ping XIAO Hong
Temperature field for improvement of internal quality of stretching round billet
Base on rigid-plastic theory, using a coupled thermo-mechanical model, the stretching process of a circular section billet is simulated by means of FEM software Deform-2D. Through the distribution of internal stress fields of stretching round billet, it is revealed that the shear stress field is the main factor to induce Mannesmann’s effect. The simulation results show that a reasonable distribution of the temperature field may improve the interior quality of the circular section billet in the stretching process.
2009 Vol. 16 (6): 17-22 [
摘要
] (
2341
) [
HTML
0KB] [
PDF
0KB] (
32
)
材料
23
M. Mostafavi
As cast acicular ductile aluminum cast iron
The effects of 2.2% Ni and 0.6% Mo additions on the kinetics, microstructure and mechanical properties of ductile aluminum cast iron were studied in the as-cast and tempered conditions. Test bars machined from cast to size samples, were used for mechanical and metallurgical studies. The results showed that the addition of Ni and Mo to the base iron produces an upper bainitic structure resulting in an increase in strength and hardness. The same trend was shown when the test bars tempered from 300oC in the range of 300 to 400oC. The elongation increased with increasing the temperature from 300 to 400oC. The carbon content of the retained austenite also increased with increasing temperature. The results also showed that the kinetics, microstructure and mechanical properties of this iron are similar to Ni-Mo alloyed silicon ductile iron.
2009 Vol. 16 (6): 23-28 [
摘要
] (
2302
) [
HTML
0KB] [
PDF
0KB] (
41
)
29
A.Akhbarizadeh M A Golozar A Shafeie M Kholghy
Effects of austenizing time on wear behavior of D6 tool steel after deep cryogenic treatment
The effects of the prior austenite grain size in deep cryogenic treatment on the hardness, the structural change and the wear resistance of D6 tool steel were investigated. The wear resistance of the cryogenically treated samples was determined using the pin-on-disk wear machine. The microstructural characteristics and phases present in heat-treated samples were determined bye use of SEM and XRD techniques. The results showed that the retained austenite is completely transformed to martensite during the cryogenic treatment. Besides, there is an optimum grain size in which the maximum wear resistance and hardness are obtained.
2009 Vol. 16 (6): 29-32 [
摘要
] (
2941
) [
HTML
0KB] [
PDF
0KB] (
31
)
33
CHEN Ji-ping KANG Yong-lin HAO Ying-min LIU Guang-ming XIONG Ai-ming
Microstructure and Properties of Ti and Ti+Nb Ultra-Low Carbon Bake Hardening Steels
Hot rolling, cold rolling and continuous annealing processes of Ti bearing and Ti+Nb stabilized ultra low carbon bake hardening(ULC-BH) steels were experimentally studied. The microstructure and texture evolution, as well as the morphology, size and distribution of the second phase precipitates during the hot rolling, cold rolling and continuous annealing were also analyzed. The results showed that the size of NbC precipitates in Ti+Nb stabilized ULC-BH steel was smaller than that of TiC precipitates in Ti bearing ULC-BH steel, this caused the average grain size of Ti+Nb stabilized ULC-BH steel to be finer than that of Ti bearing ULC-BH steel, for the yield strength, the former was higher than the latter, but for the r value which reflecting the deep drawing performance, the former was lower than the latter.
2009 Vol. 16 (6): 33-40 [
摘要
] (
2514
) [
HTML
0KB] [
PDF
0KB] (
23
)
41
Fahrettin Ozturk S Toros S Kilic
Tensile and Springback Behavior of DP600 Advanced High Strength Steel at Warm Temperatures
In recent years, the use of advanced high strength steels in automotive industry has been increased remarkably. From advanced high strength steels, dual-phase (DP) steels have gained a great attention due to a combination of high strength and good formability. However, high strength usually increases springback behavior of material which creates problem for the parts during the assembly. In this study, uniaxial tensile deformation and springback behaviors of DP600 advanced high strength steel were investigated at rolling (0o), diagonal (45o), and transverse (90o) directions in the temperature range from room (RT) to 300 oC. All tests were performed at 25 mm/min deformation speed. A V-shape die (60o) was used for springback measurements. Results indicate that the formability and springback of the material were decreased with increasing the temperatures. The material showed complex behaviors at different directions and temperatures.
2009 Vol. 16 (6): 41-46 [
摘要
] (
2837
) [
HTML
0KB] [
PDF
0KB] (
20
)
47
A.H.Meysami R.Ghasemzadeh S H Seyedein M R Aboutalebi R Ebrahimi M Javidani
Physical simulation of hot deformation, and microstructural evolution for 42CrMo4 steel prior to direct quenching
Direct quenching and tempering (DQ-T) of hot rolled steel section has been widely used in steel mill for the sake of improvement of mechanical properties and energy saving. Temperature history and microstructural evolution during hot-rolling plays a major role on the properties of direct quenched and tempered products. The mathematical and physical modeling of hot forming processes is becoming a very important tool for design and development of required products as well as to predict the microstructure and the properties of the components. These models were mostly applied to predict austenite grain size (AGS), dynamic, meta-dynamic and static recrystallization in the rods immediately after hot rolling and prior to DQ process. In this paper the hot compression tests were carried on 42CrMo4 steel in the temperature range of 900 - 1100°C and the strain rate range of 0.05 - 1 s- 1 in order to study the high temperature softening behavior of the steel. For the exact prediction of flow stress, the effective stress - effective strain curves were obtained from experiments under various conditions. On the basis of experimental results, the dynamic recrystallization fraction (DRX), AGS, hot deformation and activation energy behavior were investigated. It was found that the calculated results were in a good agreement with the experimental flow stress and microstructure of the steel for different conditions of hot deformation.
2009 Vol. 16 (6): 47-47 [
摘要
] (
3070
) [
HTML
0KB] [
PDF
0KB] (
27
)
52
ZHANG Liang Wei DU Xiao-gang Li
Effect of Environmental Factors on Electrochemical Behavior of X70 Pipeline Steel in Simulated Solution
Potentiodynamic polarization measurement was used to investigate effects of temperature, dissolved oxygen concentration and pH on the electrochemical behavior of X70 pipeline steel in simulated solution according to the orthogonal testing method. The results showed that temperature, dissolved oxygen concentration and pH had great influence on corrosion current density (icorr) of X70 steel. Corrosion current density of X70 steel was most influenced by dissolved oxygen concentration in simulated solution. The corrosion degree of X70 steel was least under the environment of low temperature, deficit oxygen and weak acid.
2009 Vol. 16 (6): 52-57 [
摘要
] (
2121
) [
HTML
0KB] [
PDF
0KB] (
41
)
58
LIU Qing-you SUN Xin-jun JIA Shu-jun ZHANG Lu-lin HUANG Guo-jian REN Yi
Austenitization Behaviors of X80 Pipeline Steels With High Nb and Micro-Ti Treatment
The austenitization behaviors of two high Nb-containing X80 pipeline steels with different Ti contents, including the dissolution of microalloying precipitates and the austenite grain growth behaviors, were investigated by using physical-chemical phase analysis method and optimal microstructure observation. The results illustrate that most Nb can be dissolved into austenite during the soaking at 1180℃, but very little amount of Ti can be dissolved. It is found that during soaking, the austenite grain growth rate is initially high, and then it decreases after 1h soaking; moreover, the austenite grains grow up more rapidly at temperatures above 1180℃ than at temperatures below 1180℃. It is shown that the steel with 0.016%Ti content has a larger austenite grain size than the steel with 0.012%Ti under the same soaking conditions, which has been explained by considering the particle size distribution.
2009 Vol. 16 (6): 58-62 [
摘要
] (
2122
) [
HTML
0KB] [
PDF
0KB] (
68
)
63
GUO Jia SHANG Cheng-jia YANG Shan-wu WANG Ying WANG Lian-wei HE Xin-lai
Effect of carbon content on the mechanical properties and weather resistance of high performance bridge steels
The influence of carbon content on the mechanical properties of high yield strength bridge steel has been investigated. The results show that, the excellent mechanical properties and corrosion resistance were obtained for the steel with carbon content between 0.03 wt.%-0.05 wt.%. According to these results, a weathering bridge plate steel with 0.045 wt.% carbon content has been developed. The appropriate control cooling process has to be taken due to the results of CCT and TTT to ensure both microstructure and mechanical properties. Continuous cooling transformation (CCT) curve of the new developing steel presents that when accelerated cooled is faster than 5℃/s, the intermediate transformation products can be formed. The isothermal transformation test (TTT) displays that the intermediate transformation temperature range in 600℃~530℃. Yield strength of the new developing steels reached 500MPa, the elongation and toughness of which are both excellent.
2009 Vol. 16 (6): 63-63 [
摘要
] (
2257
) [
HTML
0KB] [
PDF
0KB] (
19
)
70
PEI Zhong-ye;HAN Wei;ZHAO Gang;CHEN Xing-fu;LI Jun-tao;TIAN Yan-wen
Effect of Cooling Rate on Microstructure and Mechanical Properties of K465 Superalloy
K465 superalloy, as a material for production of turbine nozzle, shows high mechanical properties as well as microstructure stability in critical and severe service conditions. The alloy gains its appropriate microstructure and strength through solid solution strengthening mechanism. Heat treatment parameters such as: time and temperature of homogenization, partial solution and aging temperatures, and cooling rate from solid solution affect the microstructure of the alloy. Among these parameters cooling rate from solid solution is the most effective. Therefore, in this study the effect of cooling rate on microstructure and mechanical properties (tensile and stress properties) were investigated. For this purpose, three different cooling rates were applied on the cast K465 specimens after solution treatment at 1210℃ for 4 h. Microstructures of the specimens then were studied using optical and electron microscopy. Also, tensile tests were performed at room temperature and stress rupture tests were performed under the condition of 975℃ and 230 MPa. It was found out that with increasing cooling rate the size of the γ' precipitates decreases and the mechanical properties of specimens increases. Also, it was shown that the shape and volume fraction of primary γ' particles are largely influenced by the cooling rate following solution treatment at 1210℃ for 4 h.
2009 Vol. 16 (6): 70-74 [
摘要
] (
2693
) [
HTML
0KB] [
PDF
0KB] (
14
)
75
ZHANG Bing;TAO Chun-hu;LU Xin;LIU Chang-kui;HU Chun-yan;BAI Ming-yuan
Recrystallization of a Single Crystal Nickel-Base Superalloy
A series of experiments of investigating the recrystallization of single crystal DD3 superalloy were carried out. The threshold temperature for recrystallization and the effect of annealing temperature on recrystallization were studied. The results show that the threshold temperature for recrystallization of the shotpeened DD3 samples is between 1 000 ℃ and 1 050 ℃ under the condition of annealing for 2 h, and the recrystallization depth increases with the rise of the annealing temperature. Below 1 150 ℃, the recrystallization depth increases slowly with the temperature climbing, while above 1 150 ℃, the recrystallization depth increases quickly with the rise of the temperature. The solution of the γ′ phase is a critical factor of the recrystallization behavior of DD3 superalloy. In addition, the kinetics and microstructural evolution of recrystallization at 1 200 ℃ were also studied. It is found that the recrystallization progresses rapidly at 1 200 ℃ through the growth of fully developed recrystallized grains, and the recrystallization process on the shotpeened surface is similar to that of wrought materials, including nucleation of recrystallization, growth of new grains into the matrix, and growth of new grains by swallowing up each other.
2009 Vol. 16 (6): 75-79 [
摘要
] (
2545
) [
HTML
0KB] [
PDF
0KB] (
16
)
80
JIN Hui-Ming Lin-Nan ZHANG
Influence of Nanometric Ceria Sol-gel Coating on Oxidation Behavior of Chromium at 1000℃
Isothermal oxidation behavior of chromium with and without nanometric sol-gel CeO2 coating is studied at 1000℃ in air. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to examine the surface morphology and microstructure of their oxide films. It is found that ceria coating greatly improves the anti-oxidation property of chromium. Laser Raman spectrometer and X-ray diffraction spectrometer (XRD) are also used to study the stress level in oxide films formed on ceria-coated and ceria-free Cr. Secondary ion massive spectrum (SIMS) is used to examine Cr, O and Ce element distribution in depth in oxide films. Results show that nano-ceria application greatly reduces the growing speed and grain size of Cr2O3 film, and his fine grain-sized Cr2O3 film probably has better high temperature plasticity, i.e. oxide film relieves part of the compressive stress by means of creeping. Meanwhile, CeO2 changes the oxide film growing mechanism from predominant cation outward diffusion to anion inward diffusion. XRD and Raman testing results both show the stress declination effect due to nano-CeO2 application, and their discrepancy is analyzed concerning to the rare earth effect.
2009 Vol. 16 (6): 80-85 [
摘要
] (
2163
) [
HTML
0KB] [
PDF
0KB] (
24
)
86
DONG Hao;ZHAO Yu;YU Xiaojun;LIAN Fazeng
Effects of Sn Addition on Core Loss and Texture in Non-oriented Electrical Steels
The effects of Sn addition on core loss and texture of nonoriented electrical steels were investigated. Experiments revealed that the core loss of nonoriented electrical steels could be obviously decreased and the intensity of {111} texture and {112} texture of final annealed specimens could be markedly reduced by Sn addition. The reasons for reducing core loss and the intensity of unfavorable texture were analyzed.
2009 Vol. 16 (6): 86-89 [
摘要
] (
2303
) [
HTML
0KB] [
PDF
0KB] (
18
)
90
QI Yuhong;Philippe Lours;Yannick Le Maoult
Spallation process of Thermally Grown Oxides by in-situ CCD Monitoring Technique
In cooling process of FeCrAl alloy oxidized at 1 300 ℃, the effect of cooling speed and exposure time on oxide spalled area fraction and successive variety of the spalled region were studied by investigating evolvement of the thermally grown oxide using insitu CCD monitoring technique. The results showed that oxide spallation can be restrained by controlling cooling speed and the critical temperature drop of spallation initiation which is closely related to the oxide thickness or exposure time, and the spallation process of a little region may be described in more detail as two routes: from the oxide/substrate interface microdecohesion, microbuckles, buckle spreading, buckle crack to spallation and from the interface microdecohesion, microbuckles, buckle crack and spallation to the residual oxide decohesion and spallation.
2009 Vol. 16 (6): 90-90 [
摘要
] (
2007
) [
HTML
0KB] [
PDF
0KB] (
10
)
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
