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New Type Austenite Dynamic Recrystallization of Microalloyed Forging Steels 38MnVS During Forging Process

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Journal of Iron and Steel Research International 2013年第5期20卷 57-60页

作者： ZHANG Tong-bo SHEN Yong LIU Pan YONG Qi-long bao yao-zong Xinxing Pipes Group Co. Ltd. Great Wall Motor Co. Ltd. Central Iron and Steel Research Institute

Hot compression tests of microalloyed forging steels 38MnVS were carried out on the Gleeble-3800 thermo-mechanical simulator at the deformation temperatures from 950 to 1 150 ℃ with the strain rates ranging from 0.1 to 10 s^（-1）. The effects of the deformation temperature and strain rate on the austenite dynamic recrystallization and microstructural changes were researched. The experimental results show that the dynamic recrystallization accelerated with the increase of the deformation temperatures and the decrease of the strain rate. The activation energy of dynamic recrystallization was calculated, which was about 275.453 kJ/mol. The relation between the dynamic recrystallization and the Z-parameter was investigated, and the state chart of the dynamic recrystallization of the microalloyed forging steel 38MnVS was made according to the experimental data and the deformation parameters.

关键词： microalloyed forging steel activation energy dynamic recrystallization austenite grain size state chart 38MnVS

Explore the Strengthening Mechanisms of the Ultra-Low Carbon and Low Alloy Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 346-349页

作者： LIU Pan 1,2,LI Hong-mei 1,2,LIU Rong-pei 1,bao yao-zong 2 (1.Kunming University of Science and Technology Kunming,Yunnan 650093,China 2.Central Iron and Steel Research Institute,Beijing 100081,China) Kunming Univ Sci & Technol Kunming 650093 Yunnan Peoples R China Cent Iron & Steel Res Inst Beijing 100081 Peoples R China

Room temperature tensile tests were carried on the hot-rolled state ultra-low carbon and low alloy cabainite and martensite steels which were get by different finishing temperatures and different cooling *** used the Scanning Electron Microscopy (SEM),Electron Backscattered Diffraction (EBSD) and X-Ray Diffractometer (XRD) to identify the metallographic structure and analyse the precipitated *** inherent mechanism of high strength of ultra-low carbon and low alloy bainite and martensite steels was discussed,and the analysis indicated that the reinforcement of ultra-low carbon and low alloy bainite and martensite steels was mainly produced by the superposition of the dislocation strengthening,solution strengthening and grain refinement strengthening.

关键词： ultra-low carbon low alloy bainite martensite steel dislocation strengthening solution strengthening fine-grain strengthening precipitation strengthening

The new type austenite dynamic recrystallization of the microalloyed forging steels 38MnVS6 during forging process

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The new type austenite dynamic recrystallization of the micr...

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

2013年钒钛微合金化高强钢开发与应用技术交流会

作者： He Yi-Gui Tan Li Wei Yuan-Sheng Liu Pan Liu Dong-Lin Zhou Zhan bao yao-zong Central Iron & Steel Research Institute Jiangsu Suzhou Steel Group Co. Ltd Great Wall Motor Company Limited

Hot compression tests of microalloyed forging steels 38MnVS6 were carried out on the Gleeble-3800 thermo-mechanical simulator at the deformation temperatures from 950℃ to 1150℃ at the strain rates ranging from 0.1s-1 to *** effects of the deformation temperature and strain rate on the austenite dynamic recrystallization and microstructural changes were *** experimental results show that the dynamic recrystallization accelerated with the increase on the deformation temperatures and the decrease of the strain *** activation energy of dynamic recrystallization was calculated,it is about 275.453KJ/*** relation between the dynamic recrystallization and the Z-parameter was investigated,and the state chart of the dynamic recrystallization of the microalloyed forging steel 38MnVS6 was made according to the experimental data and the deformation parameters.

关键词： microalloyed forging steels activation energy dynamic recrystallization the austenite grain size state chart of the dynamic recrystallization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng bao Na yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

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钒对直接切削用非调质钢动态再结晶的影响

钢铁 2015年第6期50卷 63-68页

作者：满廷慧高鹏张泽华魏元生周湛包耀宗昆明理工大学材料科学与工程学院云南昆明650093 钢铁研究总院特殊钢研究所北京100081 武汉科技大学材料与冶金学院湖北武汉470081 长城汽车股份有限公司技术研究院河北保定071000 江苏苏钢集团有限公司技术中心江苏苏州215151

在Gleeble-3800热模拟试验机上进行热变形试验,研究不同钒质量分数的直接切削用非调质钢在变形温度为950~1 150℃,应变速率为0.1~10 s-1,变形量为60%的单道次压缩的奥氏体再结晶过程,计算得出V1钢的动态再结晶激活能Qd比V2钢提高了79.61... 详细信息

在Gleeble-3800热模拟试验机上进行热变形试验,研究不同钒质量分数的直接切削用非调质钢在变形温度为950~1 150℃,应变速率为0.1~10 s-1,变形量为60%的单道次压缩的奥氏体再结晶过程,计算得出V1钢的动态再结晶激活能Qd比V2钢提高了79.617 k J/mol,增加钒质量分数具有抑制奥氏体动态再结晶发生的作用。根据试验模拟结果并结合实际生产情况,确定V1钢和V2钢最佳的热加工工艺参数。

关键词： V元素动态再结晶激活能动态再结晶状态图

终锻温度对Nb-V-Ti复合非调质钢组织及性能的影响

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钢铁研究学报 2017年第1期29卷 58-61页

作者：程勇周湛周志伟刘栋林徐海峰包耀宗江苏苏钢集团江苏苏州215151 华中科技大学材料科学与工程学院湖北武汉430074 钢铁研究总院特殊钢研究所北京100081

通过金相、扫描、透射电镜研究不同锻造工艺下V-Ti、Nb-V-Ti两种微合金化非调质钢的微观组织结构及力学性能。结果显示:添加Nb能够显著提高非调质钢的奥氏体粗化温度,有效阻止奥氏体晶粒的快速长大,细化非调质钢晶粒,降低珠光体层片间距... 详细信息

通过金相、扫描、透射电镜研究不同锻造工艺下V-Ti、Nb-V-Ti两种微合金化非调质钢的微观组织结构及力学性能。结果显示:添加Nb能够显著提高非调质钢的奥氏体粗化温度,有效阻止奥氏体晶粒的快速长大,细化非调质钢晶粒,降低珠光体层片间距,使渗碳体呈粒状或球状分布;另外,添加的Nb促进V-Ti非调质钢中细小含铌碳化物的弥散析出,细化基体组织,同时提高非调质钢的强度。因此,Nb-V-Ti复合微合金化非调质钢经过未再结晶区变形后可获得均匀细小的铁素体-珠光体双相组织,且在相对较低的温度进行形变处理能够有效改善Nb-V-Ti微合金非调质钢的强韧性。

关键词：微合金非调质钢铌未再结晶区终轧工艺

锻造工艺对铌-钒微合金非调质钢显微组织的影响

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机械工程材料 2015年第1期39卷 29-31,38页

作者：何沂桂满廷慧谭利詹肇麟雍岐龙包耀宗昆明理工大学材料科学与工程学院昆明650093 钢铁研究总院北京100081 江苏苏钢集团有限公司技术中心苏州215151

在Gleeble-3800型热模拟试验机上对铌-钒微合金非调质钢进行热压缩试验,采用光学显微镜和扫描电镜研究了变形(锻造)工艺对试验钢显微组织的影响。结果表明:变形量为15%的低温(850℃)锻造能促进铌-钒非调质钢的组织细化,增加铁素体含量;... 详细信息

在Gleeble-3800型热模拟试验机上对铌-钒微合金非调质钢进行热压缩试验,采用光学显微镜和扫描电镜研究了变形(锻造)工艺对试验钢显微组织的影响。结果表明:变形量为15%的低温(850℃)锻造能促进铌-钒非调质钢的组织细化,增加铁素体含量;减小冷却速率有利于先共析铁素体的生长,铌的加入使试验钢的再结晶终止温度提高,起到细化组织的作用,同时碳氮化物的析出促进了先共析铁素体的形成,使铌-钒微合金非调质钢的组织得到改善。

关键词：锻造工艺铌非调质钢显微组织

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin Jiang bao-Xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride Ni catalysts Carbonate Metal-carbonate interface