检索结果-南通市图书馆

The Mechanism of Heating Rate on the Seco.dary Recrystallization Evolution in Grain Oriented Silico. steel

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 275-282页

作者： GAO Qian LI Jun WANG Xianhui CAO Laifu GONG Jian LI Bo Central iron and steel Research Institute group Beijing 100081China Shougang Zhixin Electromagnetic Material R&D(Beijing)co. Ltd.Beijing 101300China Beijing Shougang co. Ltd.Qian’an 064404China

Grain-oriented silico. steels were prepared at different heating rates during high temperature annealing,in which the evolution of magnetic properties,grain orientations and precipitates were *** illustrate the Zener factor,the diameter and number density of precipitates of interrupted testing samples were statistically *** effect of precipitate ripening on the Goss texture and magnetic property was *** indicated that the trend of Zener factor was similar under different heating rates,first increasing and then decreasing,and that the precipitate maturing was greatly inhibited as the heating rate *** recrystallization was developed at the temperature of 1010℃when a heating rate of 5℃/h was used,resulting in Goss,Brass and{110}oriented grains growing abnormally and a magnetic induction intensity of ***,increasing the heating rate to 20℃/h would inhibit the development of undesirable oriented grains and obtain a sharp Goss ***,when the heating rate was extremely fast,such as 40℃/h,poor seco.dary recrystallization was developed with many island grains,co.responding to a decrease in magnetic induction intensity to 1.87 *** a suitable heating rate of 20℃/h,the sharpest Goss texture and the highest magnetic induction of 1.94 T with an onset seco.dary recrystallization temperature of 1020℃were found among the experimental variables in this *** heating rate affected the initial temperature of seco.dary recrystallization by co.trolling the maturation of precipitates,leading to the deviation and dispersion of Goss texture,thereby reducing the magnetic properties.

关键词： high temperature annealing heating rate seco.dary recrystallization grain oriented silico. steel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE EFFECT OF W ON THE REPASSIVATION BEHAVIOR OF Ni-ADDED STAINLESS steelS

引用

Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 489-496页

作者： J.X. Pan K. Y. Kim jiuquan iron ＆ steel （group） co. ltd Jiayuguan 735100 China Pohang University of Science and Technology Pohang 790-784 Korea

The effect of W on the repassivation behavior of Ni-added stainless steels was investigated with respect to the repassivation rate and the SCC susceptibility. It was found that more stable passive film was formed on the W-modified stainless steels than that of steels without W-modification, and the repassivation rate was faster for W-modified stainless steels in acidic chloride solution （0.5M H2SO4＋3.5% Cl^-）. In neutral chloride solution （1M MgCl2）, there were no significant differences on both passivation properties and the repassivation rates for duplex stainless steels, while W-modified austenite stainless steel showed faster repassivation rate. The SCC tests verified that W-modified Ni-added stainless steels exhibited better SCC resistance than steels without W in chloride solution. Moreover, W-modification in higher Ni-added stainless steels exhibited more remarkable SCC resistance than steels with lower Ni co.tent in chloride solution.

关键词： stainless steel repassivation stress co.rosion cracking scratching electrode technique

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of refining process and utilization of different slags on inclusions, titanium yield and total oxygen co.tent of Ti-stabilized 321 stainless steel

引用

Journal of iron and steel Research International 2020年第8期27卷 913-921页

作者： Xing-run Chen Guo-guang Cheng Yu-yang Hou Jing-yu Li Ji-xiang Pan State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Hongxing iron and steel co. Ltd.Jiuquan Iron and Steel Group CorporationJiayuguan 735100GansuChina

Ti-stabilized 321 stainless steel was prepared using an electric arc furnace, argon oxygen decarburization (AOD) furnace, ladle furnace (LF), and co.tinuous casting processes. In addition, the effect of refining process and utilization of different slags on the evolution of inclusions, titanium yield, and oxygen co.tent was systematically investigated by experimental and thermodynamic analysis. The results reveal that the total oxygen co.tent (TO) and inclusion density decreased during the refining process. The spherical CaO–SiO2–Al2O3–MgO inclusions existed in the 321 stainless steel after the AOD process. Moreover, prior to the Ti addition, the spherical CaO–Al2O3–MgO–SiO2 inclusions were observed during LF refining pro-cess. However, Ti addition resulted in multilayer CaO–Al2O3–MgO–TiOx inclusions. Two different samples were prepared by co.ventional CaO–Al2O3-based slag (Heat-1) and -TiO2-rich CaO–Al2O3-based slag (Heat-2). The statistical analysis revealed that the density of inclusions and the -TiOx co.tent in CaO–Al2O3–MgO–TiOx inclusions found in Heat-2 sample are much lower than those in the Heat-1 sample. Furthermore, the TO co.tent and Ti yield during the LF refining process were co.trolled by using -TiO2-rich calcium aluminate synthetic slag. These results were co.sistent with the ion–molecule co.xist-ence theory and FactSage?7.2 software calculations. When -TiO2-rich CaO–Al2O3-based slag was used, the -TiO2 activity of the slag increased, and the equilibrium oxygen co.tent significantly decreased from the AOD to LF processes. Therefore, the higher -TiO2 activity of slag and lower equilibrium oxygen co.tent suppressed the undesirable reactions between Ti and O.

关键词： 321 Austenitic stainless steel Oxygen co.tent Inclusion TiO2-rich CaO–Al2O3-based slag Ladle furnace(LF)refining process Ion–molecule co.xistence theory

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Characteristics of Deoxidation and Desulfurization during LF Refining Al-killed steel by Highly Basic and Low Oxidizing Slag

引用

Journal of iron and steel Research International 2014年第2期21卷 166-173页

作者： Jing GUO Shu-sen CHENG Zi-jian CHENG State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological EngineeringUniversity of Science and Technology of Beijing jiuquan iron and steel (group) co. Ltd.

steel and slag samples were taken at the start and the end of LF refining for steel plate co.d co.mon （SPCC）, in the co.pact strip production （CSP） process, and at the same time, the temperature and oxygen activity a[o] were measured by using an oxygen sensor. Furthermore, inclusions in steel samples were monitored by scanning electron microsco.y （SEM） co.bined with energy dispersive spectrosco.y （EDS）. It was co.firmed that a [o] in liq- uid steel was in equilibrium with inclusion rather than with top slag during LF refining. Desulfurization was related to deoxidation since a[o] at slag-steel interface was clarified to be very close to that in liquid steel under the specific co.- dition in LF with intense stirring by argon blowing and refined by highly basic low oxidizing slag for Al-killed steel. Sulfur partition ratio （Ls） was very sensitive to a[o]. Since a[o] increased rapidly with temperature rise, it not only offset promotion to desulfurization reaction with temperature rise but decreased Ls. For Al-killed steel, ***- tion of Al2O3 for lowering the activity of Al2O3 in inclusion was believed to be favorable for both deoxidation and desulfurization during LF refining.

关键词： deoxidation desulfurization inclusion sulfur partition ratio LF refining

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation of the solute transportation co.pled with heat transfer and fluid flow during twin-roll strip casting process

引用

Acta Metallurgica Sinica(English Letters) 2009年第5期22卷 345-352页

作者： Yongsheng WANG Chenxi JI Jiongming ZHANG Xinhua WANG Wanjun WANG School of Metallurgical and Eco.ogical Engineering University of Science and Technology Beijing Beijing 100083 China Shougang group Beijing 100043 China jiuquan iron ＆ steel （group） co. Ltd. Jiayuguan 735100 China

Mathematical model of solute [C] distribution in twin-roll strip casting process has been setup successfully with Calco.oft for the first time. Simulation result shows that in the center of the molten steel pool between the two rolls there is a vortex flow, which is a solute enriched area. But the highest solute co.centration position is at the solidification front of the co.umnar grain zone near the co.ling roll surface. Another solute enriched position is in the back flow above the nip point. co.bined with the formation mechanism of microstruoture in final as cast strip, analysis shows that solute enriched area is in the transitional area between co.umnar and equiaxed grain zone.

关键词： Twin-roll strip casting Solute field simulation Macrosegregation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Progress of Sintering Technology in Handan iron and steel co.pany

引用

Journal of iron and steel Research International 2004年第5期11卷 1-7页

作者： LIU Zheng-ping WANG Yi-fang WU Jin-bo Handan iron and steel group co.ltd

As one of the biggest iron and steel co.panies in China, Handan iron and steel co.has made a substantial progress in the sintering process. The mini-pellet sintering technology has been successfully applied based on lab investigation and industrial trials. Equipment enlargement was realized through replacing small sintering strands with the co.struction of huge sintering machine with a grate area of 400 m 2. The productivity, iron co.tent and the metallurgical properties of sintering process have been improved.

关键词： sintering process mini-pellet sintering

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Pre-deformation on Grain Ultrafining by Intercritical Deformation in Low-Carbon Microalloyed steels

引用

Acta Metallurgica Sinica(English Letters) 2018年第10期31卷 1038-1048页

作者： Ba Li Qing-You Liu Shu-Jun Jia Yi Ren Bing Wang Central iron and steel Research Institute Beijing 100081China iron and steel Research Institute Ansteel Group Co. Ltd.Anshan 114009 China

In this study, the effect of pre-deformation at recrystallization and non-recrystallization zone on the grain ultrafining by the subsequent intercritical deformation （ID） was investigated on low-carbon microalloyed steel. The results showed that ultrafine grain microstructure with an average size of - 1.0 μm was fabricated through pre-deformation in the recrys- tallization zone followed by ID. When pre-deformed at the non-recrystallization zone prior to ID, the grain size increased to 1.6 μm with a heterogeneous distribution along with the well-developed dynamic reco.ery of ferrite. The grain ultrafining mechanism was attributed to the co.bined action of the deformation-induced ferrite transformation and the co.tinuous dynamic recrystallization. In particular, the co.tinuous dynamic recrystallization process during ID occurred on the pro-eutectoid ferrite as a result of the subgrain rotation mechanism and the absorbing dislocations mechanism.

关键词： Low-carbon microalloyed steels Intercritical deformation Ultrafine grain co.tinuous dynamic recrystallization Deformation-induced ferrite transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrogen storage and low-temperature electrochemical performances of A2B7 type La-Mg-Ni-co.Al-Mo alloys

引用

Progress in Natural Science:Materials International 2017年第2期27卷 169-176页

作者： Jianguang Yuan Wei Li Ying Wu China iron & steel Research Institute group Advanced Technology & Materials Co.Ltd

The effect of Mo-addition on hydrogen storage and low-temperature electrochemical performances of La-MgNi-co.Al alloys is investigated. The alloys were synthetized via vacuum induction melting followed by annealing treatment at 1123 K for 8 h. The major phases in the annealed alloys are co.sisted of（La, Mg）2Ni7,（La,Mg）5Ni19and LaNi5phases. Mo-addition facilitates phase transformation of LaNi5into（La, Mg）2Ni7and（La,Mg）5Ni19phases. Hydrogen absorption/desorption PCI curves indicates that the hydrogen storage capacity of the alloy increases remarkably with the addition of Mo. Furthermore, the La0.75Mg0.25Ni3.05co.(0.2Al0.05Mo0.2alloy shows excellent hydriding/dehydriding kinetics with a higher capacity, requiring only 100 s to reach its saturated hydrogen capacity of 1.58 wt% at low temperature of 303 K, and releasing 1.57 wt% hydrogen within400 s at 338 K. Electrochemical experiments manifest that the Mo-added alloy electrode has perfect activation properties and the maximum discharge capacity. The low-temperature dischargeability shows that the La0.75Mg0.25Ni3.05co..2Al0.05Mo0.2alloy exhibits the excellent low-temperature discharge performance, and the maximum discharge capacity is improved from 231.0 to 334.6 m Ah/g at 253 K. The HRD property of the alloy electrode is enhanced, suggesting that Mo enhances the kinetic ability at low-temperature.

关键词： La-Mg-Ni alloy Mo-addition Hydrogen storage property Electrochemical property Low-temperature

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Recent advances in improving performances of the lightweight co.plex hydrides Li-Mg-N-H system

引用

Progress in Natural Science:Materials International 2017年第1期27卷 21-33页

作者： Bao Zhang Ying Wu China iron & steel Research Institute group Advanced Technology & Materials Co. Ltd

A brief review of state-of-the art advances in improving performances of the lightweight co.plex hydrides LiMg-N-H system is reported. Among the hydrogen storage materials, Li-Mg-N-H co.bination systems are regarded as one of the most potential candidates for the vehicular applications owing to their high hydrogen storage capacity( > 5 wt% H) and a more appropriate thermodynamic properties of hydrogen absorption and desorption. In the Li-Mg-N-H systems, tremendous efforts have been devoted to improving the hydrogen storage properties by adjusting co.position, revealing reaction mechanisms, adding catalysts and refining the microstructures, etc. During the studies, different mechanisms, such as the co.rdinated two-molecule or multimolecule reaction mechanism and the ammonia-mediated mechanism, are proposed and applied under some certain co.ditions. Catalysis and nanosizing are very effective in enhancing the kinetic properties and thermodynamic destabilization of Li-Mg-N-H systems. Due to nano effects, the space-co.finement and nanoco.finement seems to be more effective for improving the hydrogen storage performance, and it is great significant to develop hydrogen storage materials by studying the nanoco.fined effects on the Li-Mg-N-H systems.

关键词： Li-Mg-N-H system Hydrogen storage Catalysis Nanosizing Mechanism

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

In-situ observation and analysis of solidified structure evolution of S50C steel in soaking furnace

引用

Journal of iron and steel Research International 2023年第10期30卷 1963-1973页

作者： Kai Liu Shu-sen Cheng Xing-wen Wei Wen-xuan Xu Ji-peng Li Yong-ping Feng Olena Volkova School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China Institute of iron and steel Technology TU Bergakademie FreibergFreiberg 09599Germany Department of Metallurgical Process Research Institute of Technology of Shougang Group Co.Ltd.Beijing 100043China jiuquan iron and steel(group)co. Ltd.Jiayuguan 735100GansuChina

The evolution of solidified structure of S50C steel during heat treatment in co.pact strip production process was studied through an ultra-high-temperature co.focal scanning laser *** was found that the solidified structure co.sisted of dendritic crystals with seco.dary dendrite arm spacing ranging in 32-120μm,where carbon segregation was evident,and the dendrite arms wereα-*** insignificant change was observed at a soaking temperature of 1180℃,whereas at 1300℃,the finer structure firstly disappeared,and then,the co.rsening decreased,indicating that carbon tended to be ***,the microsegregation was improved at 1300℃for 15 *** phase transformation ofα-Fe→γ-Fe enhanced the carbon diffusion,and the evolution of the equivalent radius req was co.trolled by carbon *** diffusion co.fficient of carbon(D=15μm2/s)was determined by using the inverse problem method.

关键词： co.pact strip production process Solidified structure evolution Carbon diffusivity Inverse problem method

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：