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Oxygen transfer phenomenon between slag and molten steel for production of IF steel

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Journal of Iron and Steel Research International 2020年第4期27卷 402-408页

作者： yun-qing Ji Chun-yang Liu hui-xiang yu Xiao-xuan Deng Fu-xiang Huang Xin-hua Wang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Steelmaking Plant Beijing Shougang Co.Ltd.Qian’an 100041HebeiChina Research Institute of Technology Shougang Group Co.Ltd.Beijing 100043China

FeO-containing slag originated from the basic oxygen furnace to the ladle is a major reoxidation source during the following secondary *** slag reduction treatment(slag treatment)is one of the common countermeasures adopted to eliminate the steel contamination by FeO *** oxygen transfer phenomenon between molten steel and slag was studied during the industrial production of interstitial-free(IF)steel,the measured and calculated oxygen activities in steel were compared,and the Fe–O equilibrium at the slag–molten steel interface was investigated by thermodynamic *** slag treatment,the oxygen potential is higher in the molten steel than in the pre-deoxidation slag;this causes oxygen transfer from the molten steel to the slag,decreasing the efficiency of slag *** on this,a two-step slag deoxidation process was *** second step further reduced the FeO *** the other hand,the CaO/Al2O3(C/A)ratio in the refining slag must be controlled,because it affects the FeO activity and inclusion absorption capacity of the *** results suggest that the C/A ratio of 1.2–1.5 and the FeO content of\6%are beneficial to refine IF steel.

关键词： Oxygen transfer IF steel Deoxidation Slag treatment Refining slag

Characteristics and Metallurgical Effects of Medium Basicity Refining Slag on Low Melting Temperature Inclusions

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Journal of Iron and Steel Research International 2015年第7期22卷 573-581页

作者： hui-xiang yu Xin-hua WANG Jing ZHANG Wan-jun WANG School of Metallurgical and Ecological Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Wide Plate and Coil Plant Nanjing Iron and Steel Co.Ltd.

Recently, large sized CaO-Alz 03 inclusions with low melting temperature have been the main reason for lowering mechanical properties of high strength low alloy （HSLA） steel plates. New philosophy, i.e. refining by top slag with relatively low basicity and Al2O3 content, was proposed to control such kind of inclusions. Firstly, the characteristics of refining slag, such as component activities and sulphide capacity （Cs） of CaO-Al2O3-SiO2-MgO slag, were studied through thermodynamic calculation. Then, slag-metal equilibrium experiments were carried out in laboratory to investigate the exact chemical composition of refining slag together with thermodynamic analysis. Finally, industrial trials were done to verify the desulphurization ability and inclusions control in steel refined by the new slag. Thermodynamic calculations indicated that the slags with basicity of 3.5 and Al2O3 content of 200/oo and basicity of 5.0 and Al2O3 content of 20 % or 25 % have high values of CaO activity, sulphide capacity and ratio of MgO activity to Al2O3 activity. Laboratory equilibrium experiments showed that the slag with basicity of about 4.5 and A12 03 content of about 20% is helpful for increasing the melting temperature of inclusions in steel. After introducing such kind of refining slag in industrial trials, the sulphur content in eight heats of steel is below 20 ×l0-6 , which meets the requirement of HSLA steel, and most inclusions distribute in relatively high melting zone （≥1773 K） of CaO- Al2O3-MgO（-SiO2） quasi-ternary diagram. New philosophy of top refining slag is feasible to control low melting point inclusions of CaO-Al2O3 system in HSLA steel.

关键词： refining slag desulphurization ability inelusion thermodynamic calculation slag-metal reaction

Hollow carbon spheres and their noble metal-free hybrids in catalysis

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1380-1407页

作者： xiang-hui yu Jin-Long Yi Ru-Liang Zhang Feng-yun Wang Lei Liu School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China College of Physics and State Key Laboratory of Bio Fibers and Eco Textiles Qingdao UniversityQingdao 266071China

Hollow carbon spheres have garnered great interest owing to their high surface area,large surface-tovolume ratio and reduced transmission ***,we overview hollow carbon sphere-based materials and their noble metal-free hybrids in ***,we summarize the key fabrication techniques for various kinds of hollow carbon spheres,with a particular emphasis on controlling pore structure and surface morphology,and then heterogeneous doping as well as their metal-free/containing hybrids are presented;next,possible applications for non-noble metal/hollow carbon sphere hybrids in the area of energy-related catalysis,including oxygen reduction reaction,hydrogen evolution reaction,oxygen evolution reaction,water splitting,rechargeable Zn-air batteries and pollutant degradation are discussed;finally,we introduce the various challenges and opportunities offered by hollow carbon spheres from the perspective of synthesis and catalysis.

关键词： hollow carbon spheres functionalization noble metal-free catalysis

An improved LuGre model for calculating static steering torque of rubber tracked chassis

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Defence Technology（防务技术） 2022年第5期18卷 797-810页

作者： Kang Liang Qun-zhang Tu Xin-min Shen Zhong-hang Fang Xuan Yang Yong Zhang hui-yu xiang College of Field Engineering Army Engineering University of PLANanjing210007China State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Xuzhou Construction Machinery GroupXuzhou221004China

Tire and rubber track interchangeable chassis combines the advantages of tire and rubber track,which can greatly improve the maneuverability of military construction ***,there is almost no effective calculation model for the real-time static steering *** the relative sliding speed is greater than 0.01 m/s,the influence of friction heating can not be *** improved LuGre model is established to calculate the static real-time steering torque of tire and rubber track interchangeable ***,the friction heating model between rubber and ground is *** with the influence of temperature on the dynamic performance of rubber material,the influence of friction heating on the stiffness and friction coefficient of rubber track is analyzed,and the improved LuGre friction model is *** steering torque of tire and rubber track interchangeable chassis is affected by rubber material properties,steering speed,pavement type,and ambient *** with the original Lu Gre model,the improved LuGre model captures the change in friction torque during multiple in-situ turns due to frictional *** error with the experimental data is small,which verifies the effectiveness of the improved LuGre model.

关键词： Rubber track Static steering torque Friction model Chassis Maneuverability Vehicle

各向异性自相关长度对三维计算机模拟表面参数的影响

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表面技术 2018年第6期47卷 246-251页

作者：惠玉祥王悦昶刘莹清华大学北京100084

目的研究计算机模拟过程中不同自相关长度对重构后表面表征参数的影响。方法采用新FFT方法,保持特定参数(高度均方根、偏态、峰值)不变,对不同自相关长度(3、10、30、100)在两个方向上的不同组合,进行了共16次三维粗糙表面形貌计算机模... 详细信息

目的研究计算机模拟过程中不同自相关长度对重构后表面表征参数的影响。方法采用新FFT方法,保持特定参数(高度均方根、偏态、峰值)不变,对不同自相关长度(3、10、30、100)在两个方向上的不同组合,进行了共16次三维粗糙表面形貌计算机模拟实验,并从不同方向自相关长度组合的角度,对与形貌特征关联度较高的参数影响进行了分析。结果算数平均峰曲率、峰密度、均方根斜率总体上和两个方向上的自相关长度呈负相关,而最快下降自相关长度与两个方向上的自相关长度呈正相关,纹理高宽比与两个方向的自相关长度是否接近有关,其中峰密度、最快下降自相关长度都对不同自相关长度中的较小自相关长度比较敏感,而对较大自相关长度的变化反应较小,算数平均峰曲率、均方根斜率则表现出相同的较高敏感性。结论表面表征参数中的高度分布参数和自相关长度没有关系,而结构比例方面的参数和自相关长度关联显著。

关键词：各向异性自相关长度表征参数计算机模拟三维粗糙表面

包含拉延残余应力的U形薄板工件点焊变形分析

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塑性工程学报 2018年第4期25卷 269-277页

作者：钟文项辉宇冷崇杰北京工商大学材料与机械工程学院

以铝合金薄板U形件为研究对象,将拉延成形和电阻点焊顺序耦合,研究了拉延残余应力对U形件焊后变形的影响。在此基础上,将改善应力状态分布的热处理法应用到工件点焊模型,分别在焊前和焊后对U形件整体或局部进行热处理,研究不同条件下U... 详细信息

以铝合金薄板U形件为研究对象,将拉延成形和电阻点焊顺序耦合,研究了拉延残余应力对U形件焊后变形的影响。在此基础上,将改善应力状态分布的热处理法应用到工件点焊模型,分别在焊前和焊后对U形件整体或局部进行热处理,研究不同条件下U形件的整体变形状态。结果表明：拉延残余应力在一定程度上会约束U形件的焊接变形;对完成拉延加工的U形件进行焊前热处理或焊后热处理,均能减小U形件的整体变形量,且焊前热处理对U形件整体变形量的控制优于焊后热处理;抵消拉延加工中U形件因回弹效应产生的位移偏移量的最有效方案为在焊前对U形件的侧壁进行热处理再进行电阻点焊。

关键词： U形件拉延成形电阻点焊变形热处理

TRIZ进化理论在滚筒洗衣机发展预测中的应用

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制造业自动化 2011年第21期33卷 8-10,52页

作者：冷崇杰项辉宇北京工商大学材料与机械工程学院北京100048

本文介绍了TRIZ进化理论的相关内容,重点阐述了运用技术成熟度模型曲线预测产品在市场上所处状态的方法,并结合滚筒洗衣机实例,以TRIZ进化理论为指导,应用产品技术成熟度预测方法对滚筒洗衣机发展进行了决策和预测,结果表明,TRIZ进化理... 详细信息

本文介绍了TRIZ进化理论的相关内容,重点阐述了运用技术成熟度模型曲线预测产品在市场上所处状态的方法,并结合滚筒洗衣机实例,以TRIZ进化理论为指导,应用产品技术成熟度预测方法对滚筒洗衣机发展进行了决策和预测,结果表明,TRIZ进化理论提供了一种识别和确认产品所处状态的有力工具,为企业制定合理的产品开发策略提供了科学的依据。

关键词： TRIZ进化理论技术成熟度预测方法

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao xiang Feng Gao yu-Gui Peng Peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

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论“台湾民主国”成立的历史背景

哈尔滨学院学报 2011年第2期32卷 109-114页

作者：惠翔宇福建师范大学社会历史学院福建福州350007

"台湾民主国"是甲午中日战争的历史产物,它的成立有着深刻的历史背景。首先,侵占台湾是日本帝国主义蓄谋已久的战略目标,甲午战争为其割占台湾提供了良好的机会;其次,西方列强以自身利益为标杆,对日本侵台给予默许或支持,为日本侵台提... 详细信息

"台湾民主国"是甲午中日战争的历史产物,它的成立有着深刻的历史背景。首先,侵占台湾是日本帝国主义蓄谋已久的战略目标,甲午战争为其割占台湾提供了良好的机会;其次,西方列强以自身利益为标杆,对日本侵台给予默许或支持,为日本侵台提供有利的国际形势;其三,清廷过分倚重外援,忽视自身革新与自强,武备松弛,将才非人,三者的合力共同促成日本割台的成功及中国反割台斗争的失败。

关键词： “台湾民主国” 中日战争《马关条约》