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Forging Penetration Efficiency of steel H13 Stepped Shaft Radial Forging with GFM Forging Machine

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Journal of Shanghai Jiaotong university(Science) 2012年第3期17卷 315-318页

作者：周旭东刘香茹邢建斌 School of Material Science and Engineering Henan University of Science and Technology School of Physics and Engineering Henan University of Science and Technology technical center Taiyuan Iron and Steel(Group) Co.Ltd.

The numerical thermal mechanical simulation of radial forging process of steel H13 stepped shaft with GFM(Gesellschaft fur Fertigungstechnik und Maschinenbau) forging machine was carried out by three-dimensional finite element co.e DEFORM *** to the effective plastic strain,the mean stress and the mean plastic strain distribution of the radial forging,the forging penetration efficiency(FPE) was studied throughout each *** results show that the effective plastic strain in the center of the forging is always greater than zero for the desirable larger axial drawing *** mean stress in the center of the workpiece is proposed to describe hydrostatic pressure in this *** is co.pressive strain layer beneath the surface of the workpiece to be found,while there is tensile strain co.e in the center of the *** results co.ld be a valuable reference for designing the similar forging operations.

关键词： radial forging forging penetration efficiency (FPE) stepped shaft finite element

Environmental-friendly Ramming Materials for Mud Package and Taphole of Large-scaled Blast Furnaces

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China's Refractories 2013年第4期22卷 5-8页

作者： XU Guotao LI Huaiyuan CHEN Xilai ZHANG Honglei R&D center Wuhan Iron & Steel(Group) Co. ironmaking Plant Wuhan Iron & Steel(Group) Co.

The co.positions, structures and properties of envi- ronmental-friendly ramming materials for mud package and taphole of large-scaled blast furnaces were studied. The results show that the formation of silica fibers makes structure of ramming materials dense. During the process of extruding mud and ramming materials, SiC is partly oxidized ; CaO , F% 03 and carbon penetrate towards the outer wall. The improvement of ramming materials can inhibit the penetration of molten slag, iron and carbon. The bulk density of environmental-friendly ramming ma- terials dried at 200 ℃ is 2.90 g · cm-3, the co.d co.- pressive strength of this kind of ramming materials dried at 200 ℃ is about 17. 0 MPa and fired at I 450 ℃ is about 39. 2 MPa.

关键词： blast furnace mud package taphole ramming material environmental-friendly

Extraction of Wind Stress from HF Radar Sea-Echo Doppler Spectra

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wuhan University Journal of Natural Sciences 1999年第1期4卷 73-75页

作者： Chen Xiaomei Liu Jing Wang Jianbo Zhang Ruikang Wang Dahai Wang Renhui Gui Jianian Chen Fangyu Department of Physics Wuhan University Wuhan 430072China technical center Wuhan Iron and Steel Co. Wuhan 430080China

This paper describes our preliminary results by using electron backscatter diffraction(EBSD) attachment in a scanning electron microsco.e. These studies revealed that the basal plane of 2H martensite originates from one {220} P plane of the parent phase, four variants A,B,C,D of a self acco.modating plate group originate from various {220} P planes of the parent phase. Their orientation relationships can be determined by EBSD technique. The structural information provided by EBSD technique together with the co.position information provided by energy dispersive X ray spectrometer leads to much co.vincible identification of micro area phases. By this method three phases were identified in as cast Al Cu Fe alloys with co.position near that of ico.ahedral quasicrystal(IQC), namely IQC, λ Al 13 Fe 4 and β phases. Two types of grains were found in an interstitial free steel recrystallized at 750℃.Among them the flat grains possess γ fibre microtexture benifitial to the co.d workability.

关键词： electron backscatter diffraction shape memory alloy interstitial free steel microtexture

Application of Artificial Neural Network to Predicting Hardenability of Gear steel

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Journal of iron and steel Research International 2006年第6期13卷 71-73页

作者： GAO Xiu-hua QI Ke-min DENG Tian-yong QIU Chun-lin ZHOU Ping DU Xian-bin State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China technical center Laiwu Iron and Steel Co Ltd Laiwu 271104 Shandong China

The prediction of the hardenability and chemical co.position of gear steel was studied using artificial neural networks. A software was used to quantitatively forecast the hardenability by its chemical co.position or the chemical co.position by its hardenability. The prediction result is more precise than that obtained from the traditional method based on the simple mathematical regression model.

关键词： artificial neural network (ANN) gear steel hardenability 20CrMnTiH

Effect of Zr-deoxidation on microstructure and mechanical behavior of microalloyed heavy plates with low impurity co.tent

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Journal of iron and steel Research International 2021年第2期28卷 190-200页

作者： Cheng-yang Hu Hang-yu Dong Kai-ming Wu R.D.K.Misra Lei Zhong Xing Jin Qiang Li Laboratory for Excellence in Advanced steel Research Materials Science and Engineering ProgramDepartment of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl Paso 79968TXUSA The State Key Laboratory of Refractories and Metallurgy International Research Institute for Steel TechnologyCollaborative Innovation Center for Advanced SteelsWuhan University of Science and TechnologyWuhan 430081HubeiChina Research Institute of Nanjing iron and steel co. Ltd.Nanjing 210035JiangsuChina

The significance of different deoxidation practises on the ductility and impact toughness of next generation of microalloyed heavy plates was elucidated to explore the best deoxidation practice in obtaining required mechanical properties,which was judged by the co.bined effects of co.position,size and number density of inclusions on the ductility of the experimental high-strength low alloy *** impurity co.tents,i.e.,total O+N+S co.tents,of 82×10^(-6)(Al-killed)and 118×10^(-6)(Zr-killed)have been induced to characterize both the *** was characterized using tensile and Charpy V-notch *** number,size and co.position of the inclusions were characterized using a field emission scanning electron microsco.e with an energy dispersive *** the Al-killed steel,the inclusion structure co.sisted of titanium nitrides,stringer calcium aluminates and elongated manganese sulfides,whereas in the Zr-killed steel,the inclusion structure co.sisted of mainly fine spherical oxide inclusions with sulphide *** impurity co.tent did not have a significant effect on the number density of inclusions,as with higher and lower impurity co.tent,the number of inclusions was 83.7 and 78.8 mm^(-2),***,the size distribution of the inclusions,especially the co.rse inclusions with their longest length greater than 8μm,differsmuch from each *** number density of co.rse inclusions differs from 0.8 to 1.1 mm^(-2) with processing,and in Al-killed steel,55.5% of the co.rse inclusions were titanium nitrides or manganese sulfides,whereas in Zr-killed steel,only 22.5% of the co.rse inclusions were titanium nitrides and manganese *** titanium nitrides were especially detrimental to the impact *** number density of them should be below 0.33 mm-2 in order to guarantee the best possible toughness in the steel in *** average crystallographic grain size detected by electron backscattered diffraction of Zr-killed steel(4

关键词： Microalloyed heavy plate Zr-killed technology Inclusion modification Mechanical property

Fabrication and Improving Properties of Lightweight Al_(2)O_(3)-MgO Castables for L adle Working Lining

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China's Refractories 2023年第1期32卷 6-13页

作者： WANG Zhiqiang LEI Zhongxing XU Guotao PENG Xiaoqian ZHU Boquan LIU Li GUO Zongqi Wugang Refractory co. Ltd.Wuhan 430080China R&D center of wuhan iron and steel co. Ltd.Baosteel Central Research InstituteWuhan 430080China wuhan University of Science and Technology Wuhan 430081China Xi’an University of Architecture and Technology Xi’an 710055ChinaAbstract

Three lightweight Al_(2)O_(3)-MgO castables were fabricated with tabular alumina or microporous co.undum as the aggregates,reactiveα-Al_(2)O_(3)micropowder,tabular alumina powder,and fused magnesia powder as the matrix,calcium aluminate cement as the binder,and MgO ultrafine powder(d50=5.4μm)and Al(OH)3 ultrafine powder(d50=8.2μm)as *** influence of aggregates and ultrafine powders on the properties,including pore size distribution,heat co.ductivity,thermal shock resistance,and slag resistance of lightweight refractory castables was *** results show that the inco.poration of microporous co.undum reduces the bulk density of Al_(2)O_(3)-MgO castables,and MgO and Al(OH)3 ultrafine powders further increases the proportion of micropores in castables,which is beneficial to reducing the heat co.ductivity,and improving the thermal shock resistance and slag resistance of ***,MgO ultrafine powder and Al(OH)3 ultrafine powder increase the fluidity and the strength of castables.

关键词： lightweight alumina-magnesia castables microporous co.undum ultrafine powder1

Improving the sintering performance of blends co.taining Canadian specularite co.centrate by modifying the binding medium

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 598-608页

作者： Feng Zhang De-qing Zhu Jian Pan Ya-ping Mo Zheng-qi Guo School of Minerals Processing and Bioengineering Central South University Changsha 410083 China Investment Management Department of wuhan iron and steel co.pany Limited Wuhan 430083 China

Canadian specularite co.centrate（CSC） possesses high total iron grade and low impurity co.tent. However, due to the poor granulating performance and weak reactivity of CSC at high temperature, the proportion of CSC used in sintering blends is restricted. In this research, the effects of fine limonite, slake lime, and bentonite particles on the granulation performance of blends co.taining a high ratio of CSC were studied through granulation test. Based on the test results, the effects of modification of the binding medium on the sintering performance of blends co.taining a high ratio of CSC were revealed by the sintering pot test. Both the granulation property and sintering performance of blends with a high proportion of CSC were improved by modifying the binding medium.

关键词： iron ore binding medium specula^ite co.centrate sintering performance

Monte Carlo study on abnormal growth of Goss grains in Fe-3%Si steel induced by seco.d-phase particles

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1397-1403页

作者： Dong-qun Xin Cheng-xu He Xue-hai Gong Hao Wang Li Meng Guang Ma Peng-fei Hou Wen-kang Zhang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Global Energy Interco.nection Research Institute Beijing 102211China Beijing R&D center East China Branch of Central Iron and Steel Research InstituteBeijing 100081China Department of Electrical Engineering New Materials Global Energy Interconnection Research InstituteBeijing 102211China technical center Taiyuan Iron and Steel(Group)Co.Ltd.Taiyuan 030003China

The selective abnormal growth of Goss grains in magnetic sheets of Fe-3%Si （grade Hi-B） induced by seco.d-phase particles （AlN and MnS） was studied using a modified Monte Carlo Ports model. The starting microstructures for the simulations were generated from electron backscatter diffraction （EBSD） orientation imaging maps of recrystallized samples. In the simulation, seco.d-phase particles were assumed to be randomly distributed in the initial microstructures and the Zener drag effect of particles on Goss grain boundaries was assumed to be selectively invalid because of the unique properties of Goss grain boundaries. The simulation results suggest that normal growth of the matrix grains stagnates because of the pinning effect of particles on their boundaries. During the onset of abnormal grain growth, some Goss grains with co.cave boundaries in the initial microstructure grow fast abnormally and other Goss grains with co.vex boundaries shrink and eventually disappear.

关键词： silico. steel grain growth seco.d phase particles Monte Carlo simulation

Tribological Behavior of In Situ TiC/Graphene/Graphite/Ti6Al4V Matrix co.posite Through Laser Cladding

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Acta Metallurgica Sinica(English Letters) 2021年第10期34卷 1317-1330页

作者： Zhanyong Zhao Lizheng Zhang Peikang Bai Wenbo Du Shaowei Wang Xiangyan Xu Qingnan Dong Yuxin Li Bing Han School of Materials Science and Engineering North University of ChinaTaiyuan 030051China technical center Taiyuan Iron and Steel(Group)Co.LtdTaiyuan 030003China National Key Laboratory for Remanufacturing Army Academy of Armored ForcesBeijing 100072China co.lege of Mechatronics Engineering North University of ChinaTaiyuan 030051China

The TiC/graphene/graphite/Ti6 Al4 V co.posite co.ting was prepared by laser *** microstructure and tribological behavior of the co.ting were *** in situ reaction between graphene and Ti occurred,and feathery TiC was *** feathery TiC was homogeneously distributed betweenα’acicular martensites which was refined with the addition of *** graphene was transformed into allotrope graphite under the laser *** TiC hard particles and the self-lubrication of graphene/graphite improved the wear resistance of co.posite *** wear rate and friction co.fficient of TiC/graphene/graphite/Ti6 Al4 V co.posite co.ting decreased with the increase in sliding speed,a mechanical mixing layer(MML)was formed on the wear surface of the co.posite co.ting under the frictional heat,which protected the substrate and reduced the *** of the self-lubricating properties of graphene/graphite,interlayer sliding occurred easily,which also effectively reduced *** wear rate of TiC/graphene/graphite/Ti6 Al4 V co.posite co.ting increased with the increase in load,but the friction co.fficient *** plastic deformation of subsurface layer was more serious under high load,and a stable self-lubricating MML with a protective effect was formed between the wear interfaces,which reduced the friction *** the increase in load,the wear mechanism changed from abrasive and oxidation wear to delamination,fatigue and oxidation wear.

关键词： Laser-processing Microstructure co.ting Titanium alloy Friction Wear mechanism