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Recent Development of Air-Cooled Bainitic Steels Containing Manganese

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Journal of Iron and Steel Research International 2005年第2期12卷 1-10页

作者： FANGHong-sheng YANGFubao BAIBing-zhe YANGZhi-gang YINJiang TsinghuaUniversity Beijing100084China GeneralResearchInstituteforNonferrousMetals Beijing100088China baosteelgroupshanghaino.5steelco.td Shanghai200940China

The superiorities of air-cooled bainitic steels were described. A series of air-cooled bainitic steels containing manganese were developed and presented, which include low carbon granular bainitic steels, low carbon grain-boundary allotriomorphic ferrite/granular bainite dual phase steels, medium and medium high carbon bainite/martensite dual phase steel, low carbon carbide free bainite/martensite dual phase steels and casting bainitic steels. The development of ultra-low carbon bainitic steels in China was also introduced.

关键词： bainite bainitic steel strength toughness

Characterization of Nanocrystallizatin Surface Layer of 0.4C-1Cr Low Alloy Steel Prepared by Ultrasonic Particulate Peening

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材料热处理学报 2004年第05B期25卷 1257-1259页

作者： ZHANGJun-bao LIUYu-liang ZHAOXin-qi WUJie SONGHong-wei XIONGTian-ying BaosteelTechnologyCenter BaoshanIron＆SteelCO.LTD.ShanghaiChina InstituteofMetalResearch ChineseAcademyofSciencesShenyangChina

A nanostructured surface layer was fabricated in a quenched and tempered 0.4C-lCr low alloy steel by ultrasonic particulate peening technique. The microstructure of the nanocrystalline surface layer was characterized by means of TEM and Mossbauer spectroscopy. Experimental results reveal that both cementite and ferrite nanocrystals with an average size of 5 nm were formed in the surface layer of the steel, phase transformation of austenite and dissolution of cementite maybe occur in the process of ultrasonic paniculate peening.

关键词：显微结构超声波喷丸处理表面毫微结晶 0.4C-1Cr低合金钢

High temperature oxidation behavior of high speed steel for hot rolls material

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Journal of University of Science and Technology Beijing 2005年第2期12卷 166-171页

作者： LiZhou FangLiu ChangshengLiu DaleSun LisongYao SchoolofMaterialandMetallurgy NortheasternUniversityShenyang110004China TechnologyCenter BaoshanIron＆SteelCo.Ltd.Shanghai201900China

The oxidation characteristics of high speed steel (HSS) were studied at 500 to 800°C. The non-isothermal oxidation and isothermal oxidation (500, 575, 650, 725, 800°C) of HSS were investigated by thermo-gravimetric analysis (TGA). The microstruc- ture, morphology and oxide scale thickness of the isothermal oxidation samples were analyzed by optical microscope (OM), electron probe micro analyzer (EPMA), X-ray diffraction spectrum (XRD) and scanning electron microscope (SEM). The results indicate that the oxidation rate of HSS is very slow at 500 to 650°C, increasing gradually at 650 to 750°C, and drastically at 750 to 800°C, be- cause the phase transformation happens at about 750°C.

关键词： high speed steel high temperature oxidation isothermal oxidation non-isothermal oxidation oxide kinetics

High Temperature Oxidation Behavior of High Speed Steel for Roll in Water Vapor

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材料热处理学报 2004年第5期25卷 134-138页

作者： ZHOULi LIUFang LIUChang-sheng SUNDa-le CollegeofMaterial＆Metallurgy NortheasternUniversityShenyang110004China BAOSHANIron＆steelco. LTD.TechnologyCenterShanghai201900China

The oxidation behavior of high speed steel (HSS) was researched by high temperature thermo balance at 500 to 800 °C in water vapor. The morphology was observed by scanning electron microscope, the microstructure of oxide scale was analyzed by energy dispersive spectrometer and X-ray diffraction spectrum. The results indicate that the mass gain of HSS increases with oxidation temperature rising, the effect of oxidation temperature on the morphology is obvious, water vapor temperature only affects mass gain and affects hardly morphology of oxide scale at the same oxidation temperature. The relevant oxidation mechanisms are also discussed.

关键词：高速钢高温氧化等温氧化集中放大硬质合金

Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

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Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang Cheng Hao Tongtong Fu Dian Yu Jane Howe Kaiwen Chen Ning Yan Hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

Computer Aided Design of Heat Treatment for AISI P20+Ni Mold Steel with Good Machinability

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材料热处理学报 2004年第5期25卷 627-630页

作者： HUXin-bin GAOWen HEYan-lin LILin Dept.Mater.Sci.＆Eng. ShanghaiUniversity149YanchangRoadShanghai200072China Dept.Mater.Sci.＆Eng. ShanghaiUniversity149YanchangRoadShanghai200072China／Dept.MechanicalEngineeringHubeiPolytechnicUniversityWuhan430068China ShanghaiNo.5steelco. LTDofShanghaiBaosteelGroupCo.Shanghai200940China

Computer aided design of heat treatment for AISI P20 mold steel with good machinability is attempted to proceed by the commercial software package Thermo-Calc (TCP+DICTRA). Through experimental and theoretical analysis of phase transformation during heat treatment, further knowledge of designing proper heat treatment is obtained. Then the machinability of AISI P20+Ni steel under given heat treatment condition is studied and the influencing factors to their machinability are analyzed. It is shown that heat treatment designed by computer simulation of carbide transformation is applicable to AISI P20+Ni steel with good machinability; AISI P20+Ni steel with tempered sorbite treated by quenching & tempering has optimal machinability; normalizing at the temperature of 910°C & tempering can avoid cracking and result in acceptable machinability in small thickness module.

关键词：热处理 AISI P20+Ni模具钢可加工性计算机设计

Research and Development of X70 with an Acicular Ferrite Microstructure for West-East Pipeline Project

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工程科学（英文版） 2004年第4期2卷 36-39页

作者： ZhengLei GaoShan TechnicalCentreofBaoshanIron＆steelco.Ltd. Shanghai201900

It is introduced in this paper that a high strength and high toughness X70 pipeline steel with an ultra low acicular ferrite microstructure has been researched and developed at Baosteel according to the requirements of the West East Gas Pipeline(WEGTP) project. The developed steel has higher strength, higher toughness, lower ductile brittle transition temperature and higher dynamic tear resistance than the conventional X70 with ferrite and pearlite microstructure. The excellent properties of the steel are benefited from ultra-low carbon acicular ferrite consisting of interaction of very fine precipitated particles and high-density dislocation. And the steel has been applied on the WEGTP in China.

关键词： X70 微型结构高强度输气管道管线钢

Applications of Mass Customization Production Mode in Chinese Steel Industry

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工程科学（英文版） 2005年第2期3卷 35-40,48页

作者： ZhouShichun DingJianhua ChenChao BaoshanIron＆steelco. Ltd.Shanghai201900

In this paper, the conflict between individual needs of market and the efficient mass production requirement of manufacture under the background of market globalization is discussed, a trend that the main production mode for domestic steel industry should be the mass customization is pointed out, and the problems to be solved for domestic enterprise are analyzed. Summarizing the practice of Baosteel Co. LTD on the new production mode, the achievements and experiences are presented.

关键词：中国钢铁工业市场生产模型

Saving and Utilizing on Water Resources from Steel Making

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工程科学（英文版） 2005年第2期3卷 41-45,48页

作者： HuLiguang TheEnergyDepartmentofBaosteelIron＆steelco. Ltd.Shanghai201900

In this essay, the author gives some presentation of the water saving practices in Baosteel for years. Relying on water saving research program and by means of water utilization analysis, water consumption distribution balance test water from every sequence of production activities, Baosteel promotes the waste saving projects including waster water comprehensive utilization and water loss reduction. At the same time, the water utilization technology analysis work and management work have considerably strengthened and operation of saving on fresh water sources and waster water utilization has been put into practice with the purpose to decrease water loss per ton of steel making, while the quality of water is placed under guarantee, a number of new records of water consumption ratio comes into being constantly.

关键词：水资源炼钢节水水利用分析