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Review of precipitation strengthening in ultrahigh-strength martensitic steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 256-269页

作者： Zhihao Tian Chunlei Shang Chaolei Zhang Xiaoye Zhou Honghui Wu Shuize Wang Guilin Wu Junheng Gao Jiaming Zhu Xinping Mao Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute of steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China department of Materials Science and Engineering Shenzhen MSU-BIT UniversityShenzhen 518172China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China School of Civil Engineering Shandong UniversityJinan 250061China

Martensite is an important microstructure in ultrahigh-strength steels,and enhancing the strength of martensitic steels often involves the introduction of precipitated phases within the martensitic *** considerable research efforts devoted to this area,a systematic summary of these advancements is *** review focuses on the precipitates prevalent in ultrahigh-strength martensitic steel,primarily carbides(e.g.,MC,M_(2)C,and M_(3)C)and intermetallic compounds(e.g.,Ni Al,Ni_(3)X,and Fe_(2)Mo).The precipitation-strengthening effect of these precipitates on ultrahigh-strength martensitic steel is discussed from the aspects of heat treatment processes,microstructure of precipitate-strengthened martensite matrix,and mechanical ***,a perspective on the development of precipitation-strengthened martensitic steel is presented to contribute to the advancement of ultrahigh-strength martensitic *** review highlights significant findings,ongoing challenges,and opportunities in the development of ultrahigh-strength martensitic steel.

关键词： ultrahigh-strength martensitic steel precipitation strengthening mechanical property carbide intermetallic compound

Effect of Temperature and Strain Rate on Dynamic Properties of Low Silicon TRIP steel

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Journal of Iron and steel Research International 2006年第3期13卷 51-56页

作者： TIAN Rong LI Lin B C De Cooman WEI Xi-chen SUN Peng department of Materials Science and Engineering Shanghai UniversityShanghai 200072China Laboratory for Iron and steel making Ghent UniversityGhent B-9052Belgium

The dynamic tensile test of 0.11C-0.62Si-1.65Mn TRIP steel was carried out at different strain rates and test temperatures. The results show that both temperature and strain rate affect the retained austenite transformation. At high strain rates, the uniform elongation decreases, whereas the total elongation and energy absorption increase. The tensile strength is less strain rate sensitive. With raising test temperature, the tensile strength is reduced and the mechanical properties generally deteriorate, especially at 110℃,However, excellent mechanical properties were obtained at 50℃ and 75℃.

关键词： TRIP retained austenite dynamic tensile test strain rate tensile strength

Comparative Evaluation and Performance Analysis of Heat Exchangers Featured with Peened Surface

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Journal of Thermal Science 2025年第1期34卷 50-61页

作者： DINESHBABU Chinnadurai SHIVA SANKARAN Nallasamy VENKATESH RAJA Krishnan VENKATESH Rathinavelu department of Mechanical Engineering Kongunadu College of Engineering and Technology department of Mechanical Engineering Selvam College of Technology department of Mechanical Engineering Sona College of Technology department of Mechanical Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences (SIMATS)Saveetha University

Heat exchangers have the potential for various engineering applications,and their performance is enriched by surface *** proposed system enriches the heat exchanger's performance by adapting a peened stainless steel（SS） surface blasted with copper,grinding,sand,and *** influences peened SS surface modified with a copper blast,grinding,sandblast,and iron blast on the surface morphology of shell and tube heat exchanger surface（STHE） is analyzed via tungsten heated cathode electron gun featured scanning electron microscope and observed coarse grain *** SS surface featured STHE performance is experimentally evaluated by different flow rates（30,60,90,and 120 L/min） underwater fluid medium functioned by the temperature ranges of 25-75℃ and its results are compared with computational fluid dynamic（CFD）/heat transfer research（HTRI） analyzed *** 60 L/min flow rate was spotted as an optimum value for both shell and tube side *** STHE is operated with a 60 L/min flow rate under the different peened surfaces and evaluated its Stanton number,Nusselt number,logarithmic mean temperature difference（LMTD）,overall heat transfer coefficient,number of transfer units（NTU）,effectiveness,and exergy *** iron blasted SS peened surface was observed to have better SHTE performance like Stanton number（0.0012）,Nusselt number（2180）,reduced LMTD of 31℃,improved overall heat transfer co-efficient of 2400 W/（m2·K）,better NTU of 0.5532,good effectiveness value of 0.451 62,and hiked exergy efficiency of 10% respectively.

关键词： penned surface performance analysis shell and tube heat exchanger stainless steel

Production Planning System for the Whole steelmaking Process of Panzhihua Iron and steel Corporation

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Journal of Iron and steel Research International 2014年第S1期21卷 44-50页

作者： Jian-yu LONG Zhong ZHENG Xiao-qiang GAO Yong-min GONG College of Materials Science and Engineering Chongqing University College of Economics and Business Administration Chongqing University Vanadium-extracting and steel-making Plant Panzhihua Iron and steel (Group) Co.

A production planning system is designed for the whole steelmaking process, which includes desulfurization, vanadium extraction, steelmaking and continuous casting processes of Panzhihua Iron and steel Corporation. The system is composed of modeling module, data interface module, data analysis module, static planning module, re-planning module, plan evaluation module, plan simulation module and human-computer interaction module. The system is connected with the L3 system of steel plant by using the data interface module, which can receive the real time scheduling information to make the static plan and re-plan under production disturbances. The simulation and plan evaluation function of the system can assist decision-maker to check and modify the production plan. The simulation experiments with real process data show that the system can make a feasible, executable, and effective production plan, and deal with primary random disturbances during production process timely.

关键词： production planning replanning steelmaking-continuous casting vanadium extraction whole process of steel plant

Influence of coiling temperature on microstructure and mechanical properties of a hot-rolled high-strength steel microalloyed with Ti,Mo and V

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Journal of Iron and steel Research International 2022年第3期29卷 484-493页

作者： Zhi-xiang Fu Geng-wei Yang Ru-yang Han Yao-wen Xu Xin-ping Mao Si-qian Bao Gang Zhao Hubei Provincial Key Laboratory for New Processes of Iron making and steel making Wuhan University of Science and TechnologyWuhan430081HubeiChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Collaborative Innovation Center of steel Technology University of Science and Technology BeijingBeijing100083China

Influence of coiling temperature(CT)on the microstructure and mechanical properties of a hot-rolled high-strength steel microalloyed with Ti,Mo and V was *** precipitation behavior of nano-sized particles was investigated by theoretical calculation and quantitative *** the results revealed that V-enriched(Ti,Mo,V)C precipitated in the ferrite *** the CT decreased,the site fractions of Ti in(Ti,Mo,V)C changed little,the site fractions of Mo increased,and the site fractions of V decreased ***,the low CT could refine the microstructure and precipitated particles but suppress the precipitation of(Ti,Mo,V)C particles simultaneously,leading to the volume fraction of(Ti,Mo,V)C significantly decreasing,consequently causing an increment of grain refinement strengthening and a reduction in precipitation *** the CT was 600℃,the steel characterized by fine polygonal ferrite,a small amount of bainite and nano-sized(Ti,Mo,V)C precipitates exhibited the optimum mechanical properties with the ultimate tensile strength of 870 MPa,yield strength of 807 MPa and elongation to fracture of 17%.

关键词： Ti-Mo-V complex microalloying Coiling temperature Precipitation Strengthening mechanism Microstructure

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采用轻压下技术减少板坯中心偏析

钢铁 2004年第Z1期39卷 286-288页

作者： Jemin Park Hong-gu Ryu Seung-kwan Baek Shin-Eon Kang steel making department Gwangyang Works POSCO Steel Making Department Gwangyang Works POSCO Steel Making Department Gwangyang Works POSCO POSCO Research Laboratory

近来,为提高竞争力,提高API钢市场占有率,必须增加高质量API钢的产量,尽最大努力去满足消费者对产品质量的严格要求,尤其是生产耐酸钢.不仅要最大限度地控制钢中残留元素和夹杂物的含量,而且还要避免中心偏析.因此,POSCO正致力于开发生... 详细信息

近来,为提高竞争力,提高API钢市场占有率,必须增加高质量API钢的产量,尽最大努力去满足消费者对产品质量的严格要求,尤其是生产耐酸钢.不仅要最大限度地控制钢中残留元素和夹杂物的含量,而且还要避免中心偏析.因此,POSCO正致力于开发生产工艺,更新基础设备,以满足消费者的要求.在POSCO的Gwangyang工厂,由于受铸机条件限制,控制板坯中心偏析有一定难度.为了克服这一困难,Gwangyang工厂在1-3铸机上安装了动态轻压下设备.动态轻压下系统的操作条件处于优化阶段.轻压下设备上采用了动态二次冷却系统和热示踪模型,板坯中心偏析系数有了明显降低.

关键词：连铸轻压下二次冷却中心偏析

Effect of Indian Medium Coking Coal on Coke Quality in Non-recovery Stamp Charged Coke Oven

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Journal of Iron and steel Research International 2014年第7期21卷 673-678页

作者： H.P.Tiwari P.K.Banerjee V.K.Saxena S.K.Haldar Raw Material and Coke making Research Group Research and Development DivisionTata Steel Ltd.Jamshedpur 831001JharkhandIndia department of Chemical Engineering Indian School of Mines Coke Plants Tata Steel Ltd.Jamshedpur 831001JharkhandIndia

The maximum possibility of utilizing the Indian coking coals and inferior grade coking coal for producing metallurgical coke through non-recovery stamp charging tech_nology was investigated. Indian indigenous coals contained low percent of vitrinite （〈50%） and higher content of ash （〉15%） compared to imported coking coal. Therefore, the selection of appropriate proportion of different types of coals was a major challenge for coke makers. Coal blend selection criterion based on a single coefficient, named as composite coking potential （CCP）, was developed. The use of increased proportion of semi-soft coal （crucible swelling number of 2.5） and high ash （≥15%） indigenous coal in the range of 20%- 35% and 20%-65% respectively in the blends resulted in good quality of coke. Plant data of a non recovery coke oven were used for developing and validating the model. The results showed that the coke strength after reaction （CSR） varied in the range of 63.7%-67.7% and the M40 value was between 81.8 and 89.3 in both the cases.

关键词： Indian coking coal imported coking coal CCP CSR M40 non-recovery stamp charged coke making

Thermal Stability of Retained Austenite in TRIP steel After Different Treatments

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Journal of Iron and steel Research International 2008年第1期15卷 61-64页

作者： SHI Wen LI Lin Bruno C De Cooman Patrick Wollants YANG Chun-xia department of Material Science and Engineering Shanghai University Shanghai 200072 China Laboratory for Iron and steel making Department of Material Science and Engineering Technologiepark 903 BE-9052 Ghent Belgium department MTM KU Leuven Heverlee B-3001 Belgium

Thermal decomposition of retained austenite in TRIP steel was investigated by means of differential scanning calorimetry（DSC）.The decomposition curve was abnormal,and the decomposition temperature and the activation energy were measured by the Kissinger method,which were all higher than those in quenched *** thermal decomposition data of samples soaked in liquid nitrogen after TRIP treatment were all similar to those without additional low temperature *** indicated that there is a high thermal stability in retained austenite of the TRIP steel at low temperature,which was also proved by XRD analysis.

关键词： TRIP steel retained austenite thermal stability differential scanning calorimetry

Few-shot learning for screening 2D Ga2CoS4-x supported single-atom catalysts for hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 665-673页

作者： Nabil Khossossi Poulumi Dey department of Mechanical Engineering (ME) Delft University of Technology

Hydrogen generation and related energy applications heavily rely on the hydrogen evolution reaction（HER）,which faces challenges of slow kinetics and high *** electrocatalysts,particularly single-atom catalysts （SACs） on two-dimensional （2D） materials,are *** study presents a few-shot machine learning （ML） assisted high-throughput screening of 2D septuple-atomic-layer Ga2CoS4-xsupported SACs to predict HER catalytic ***,density functional theory （DFT）calculations showed that 2D Ga2CoS4is inactive for ***,defective Ga2CoS4-x（x=0–0.25）monolayers exhibit excellent HER activity due to surface sulfur vacancies （SVs）,with predicted overpotentials （0–60 mV） comparable to or lower than commercial Pt/C,which typically exhibits an overpotential of around 50 m V in the acidic electrolyte,when the concentration of surface SV is lower than 8.3%.SVs generate spin-polarized states near the Fermi level,making them effective HER *** demonstrate ML-accelerated HER overpotential predictions for all transition metal SACs on 2D *** DFT data from 18 SACs,an ML model with high prediction accuracy and reduced computation time was *** intrinsic descriptor linking SAC atomic properties to HER overpotential was *** study thus provides a framework for screening SACs on 2D materials,enhancing catalyst design.

关键词： Hydrogen production Electrocatalyst 2D material Density functional theory Machine learning Surface sulfur vacancy