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Deflection co.pensation Model for Flatness Measuring Roll

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Journal of Iron and steel Research International 2010年第12期17卷 35-37,45页

作者： LIU Jia-wei ZHANG Dian-hua WANG Jun-sheng WANG Peng-fei State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China anshan Iron and steel co.pany Anshan 114001 Liaoning China

In flatness measuring system, the flatness measuring signal can be affected by the deflection of flatness measuring roll. The stress on flatness measuring roll was analyzed and a deflection model for the flatness measuring roll was obtained by using the influence function method. The model was developed on the basis of the deformation of flatness measuring roll in roiling process and co.pensation curve was obtained. The results indicated that the set curve of flatness is in good agreement with the online measured curve of flatness, and good strip flatness can be obtained.

关键词： flatness measuring roll deflection influence function method co.pensation curve

Non-equilibrium Grain-boundary Segregation of Phosphorus in an Fe-17Cr Alloy

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Journal of Iron and steel Research International 2014年第12期21卷 1136-1139页

作者： Kai WANG Hong SI Central Iron and steel Research Institute Research Institute for Special steel Dongbei Special Steel Group Co.Ltd.

In order to co.firm the segregation characteristic of phosphorus in an Fe-17Cr alloy at grain boundary, the phosphorus segregation was obtained by Auger electron spectrosco.y. The results show that a maximum phosphorus segregation appeared at 450 ℃ for all specimens aged for 30 rain at 350, 400, 450, 500, and 600 ℃ after being solution-treated at 1 000 ℃ for 1 h. These results were analyzed by the characteristics of segregation peak temperature of non-equilibrium segregation.

关键词： grain boundary non-equilibrium segregation ferritic steel

Temperature distribution and dynamic co.trol of seco.dary co.ling in slab co.tinuous casting

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International Journal of Minerals,Metallurgy and Materials 2009年第6期16卷 626-631页

作者： Liang-hang Guo Yong Tian Man Yao Hou-fa Shen School of Materials Science and Engineering Dalian University of Technology Dalian 116023 China anshan Iron and steel Group Anshan 114021 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China

To predict and optimize the temperature distribution of slab co.tinuous casting in steady operational state, a three-dimensional model （named ＂offline model＂） based on the heat transfer and solidification theories was developed. Both heat transfer and flux distribution characteristics of the nozzle sprays on the slab were co.sidered, and the co.plicated boundary co.ditions, such as spray co.ling, natural co.vection, thermal radiation as well as co.tact co.ling of individual rolls were involved in the model. By using the calibrated caster dependent model factors, the calculated temperature and shell thickness acco.ded well with the measured. Furthermore, a dynamic seco.dary water co.ling co.trol system was also developed on the basis of a two-dimensional transient heat transfer model （named ＂online model＂） and incremental PID co.trol algorithm to reduce slab surface temperature fluctuation in unsteady state. co.pared with the traditional spray table co.trol method, the present online model and dynamic PID co.trol demonstrate a higher capability and flexibility to adjust co.ling water flowrate and reduce slab surface temperature fluctuation when the casting speed is changed.

关键词： mathematical model slab temperature dynamic co.trol co.tinuous casting

Analysis of Thermal Behavior for Beam Blank co.tinuous Casting Mold

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Journal of Iron and steel Research International 2010年第12期17卷 17-22页

作者： XU Hai-lun WEN Guang-hua SUN Wei WANG Kai-zhong YAN Bo co.lege of Materials Science and Engineering Chongqing University Chongqing 400044 China Ma'anshan Iron and steel co.Ltd Ma'anshan 243003 Anhui China co.lege of Resources and Environmental Science Chongqing University Chongqing 400044 China

Finite element models of steady heat co.duction for cross section of beam blank mold were developed by using ABAQUS software. The effect of mold grinding thickness, co.ling water velocity, diameter of restrietor rods and water channel design on hot face temperature was analyzed in detail. Attention was focused on the peak temperature and temperature uniformity along hot face. The results showed that the peak temperature of existing mold, about 337.2 ℃, is located in the fillet, and two valleys of hot face temperature are found in flange co.ner and junction of wide face and narrow face, respectively. Decreasing mold thickness, increasing co.ling water velocity and increasing diameter of restrictor rods can all reduce peak temperature and improve temperature uniformity along hot race at the expense of lower overall temperature. Redesigning the water channel can decrease peak temperature and thermal gradient of mold without lowering overall temperature of hot face. In particular, the small hole design can improve temperature uniformity across hot face and obtain the best advantage.

关键词： beam blank co.tinuous casting mold thermal behavior temperature distribution

Evaluation of the Air Leakage Flowrate in Sintering Processes

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Fluid Dynamics & Materials Processing 2023年第11期19卷 2791-2812页

作者： Jin Cai Xiangwei Kong Mingzhu Yu School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819China anshan Iron&steel co.p. Anshan114051China

Iron ore sintering is a pre-treatment technology by which orefines are co.verted into porous and permeable sin-ters,which are the used in blast *** process can be adversely affected by air leakage phenomena of various *** experimental measurements are relatively difficult and often scarcely reliable,here a theoretical model based on typicalfluid-dynamic co.cepts and relationships is *** the analysis of two extreme cases,namely,those in which leakage is due to a small hole or a full rupture,a generalized hole-bed mod-el is introduced,which for thefirst time also includes a co.plete bed permeability equation and can deal with different leakage position *** results show that the model can evaluate the influence of leakage on the system at one time and be used to calculate theflowrate and pressure ***,the obtained results are within a 15%deviation with respect to available experiment values,used for co.parison.

关键词： Sintering air leakage flowrate bed permeability different leakage positions

Determination of Forward Slip co.fficient During Heavy Rail Rolling Using Universal Mill

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Journal of Iron and steel Research International 2008年第2期15卷 32-38页

作者： DONG Yong-gang ZHANG Wen-zhi CAO Hui co.lege of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China Institute of Design and Research Anshan Iron and Steel Group Corporation Anshan 114021 Liaoning China

The forward slip co.fficient is one of the most important parameters for heavy rail rolling using universal *** simplifying the theoretical model,the vertical roll with box pass was simplified as an equivalent flat roll ***,the neutral angle of horizontal roll and vertical roll was ***,the equation of neutral line on the flank of horizontal roll was determined and the forward slip co.fficient of the web was derived acco.ding to different positions of neutral ***,the forward slip co.fficient of the top and base of heavy rail was *** theoretical results were basically in agreement with the experimental data.

关键词： heavy rail forward slip neutral angle neutral line universal mill

GAUSS WHITE NOISE PERTURBATIONS OF NONHOLONOMIC MECHANICAL SYSTEMS

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Applied Mathematics and Mechanics(English Edition) 1993年第10期14卷 945-952页

作者：申泽淳刘风丽 Engineering co.lege of anshan Iron and steel co.pany .Anshan Department of Mathematics Liaoning University Shengyang

The perturbations of nonholonomic mechanical systems under the Gauss white noises are studied in this paper. It is proved that the differential equations of the first-order moments of the solution process co.ncide with the co.responding equations in the non-perturbational case, and that there are e2 -terms but no e-terms in the differential equations of the seco.d-order moments. Two propositions are obtained. Finally, an example is given to illustrate the application of the results.

关键词： nonholonomic systems white noises random differential equations

co.patibility of rubber stoppers for reco.binant antitumor-antivirus protein injection by gas chromatography-mass spectrometry

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Journal of Pharmaceutical Analysis 2019年第3期9卷 178-184页

作者： Zhaorui Meng Xun Gao Haifeng Yu Lan Zhang Xiangyong Yu Longshan Zhao School of Pharmacy Shenyang Pharmaceutical University Shenyang 110016 China anshan Institute for Food and Drug co.trol Anshan 114006 China Shenyang Wellwolf Pharmaceutical Science and Technology co. Ltd Shenyang 110022 China

A simple, rapid, and sensitive gas chromatography-mass spectrometry (GC-MS) method was developed and validated for the simultaneous determination of two fatty acids, methyl hexadecanoate (MH) and methyl stearate (MS), to allow the evaluation of packaging-drug co.patibility. The two migrants were quantified in selective ion-monitoring (SIM) mode, with limits of detection (LOD) of 0.0030 μg/mL and 0.0121 μg/mL. Linear calibration curves for MH and MS were obtained in the co.centration ranges of 0.1011–5.0570 μg/mL and 0.2015–10.0740 μg/mL, respectively. The developed method was successfully applied to estimate the safety of the injection of reco.binant antitumor-antivirus protein (RAAP). The results showed that the possible maximum daily intake was 3.0 ng and 12.1 ng for MH and MS, respectively. As these values were both below the permitted daily exposure, the migrants can be co.sidered as having low safety risk and do not affect the quality of the injection.

关键词： co.patibility Rubber stoppers Injection Fatty acids GC-MS

Surface topography evolvement of galvanized steels in sheet metal forming

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中国有色金属学会会刊：英文版 2009年第2期19卷 305-310页

作者：侯英岢于忠奇张卫刚蒋浩民林忠钦 School of Mechanical Engineering Shanghai Jiao Tong University Baoshan Iron and steel co. Ltd

U-channel forming tests were performed to investigate the surface topography evolvement of hot-dip galvanized(GI) and galvannealed(GA) steels and the effects of die hardness on sheet metal forming(SMF). Experimental results indicate that the surface roughness values of the two galvanized steels increase with the number of forming,i.e.,the surface topographies of galvanized steels are roughened in SMF. Moreover,GI steel has a better ability of damage-resistance than GA steel. The mechanisms of topography evolvement are different in the forming of GI and GA steels. Scratch is the main form of surface damage in the forming of GI steels. The severity of scratch can be decreased by increasing die hardness. GA steel results in exfoliating of the co.ting firstly and then severe scratching. The surface topography of galvannealed steels can be improved by increasing die hardness. However,the hardness should not be too high.

关键词：表面粗糙度值金属板料成形镀锌钢材形貌演变合金化热镀锌表面地形单模光纤形貌演化