共查询到19条相似文献,搜索用时 78 毫秒
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应用Ansys有限元分析软件,对3500mm炉卷轧机机架的有限元进行分析,为工程技术人员和生产操作人员提供了可靠的技术参数。也为现场轧制工艺参数的调整优化提供了重要的参考。 相似文献
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通过热连轧带钢温度场的有限元分析以及带钢热连轧过程的再结晶动力学和应变累积的研究,建立了精轧过程平均流变应力模型:静态再结晶平均流变应力σk=k1 exp{0.126-1.75[C] 0.594[C]^2 (2851 2968[C]-1120[C]^2)/T/ε^0.21ε^0.13,其中T-再结晶温度/K,ε-应变,ε-应变速率/s^-1,k1-系数;动态再结晶平均流变应力σD=9.8σB(1-Xdyn) 1.14σBB Xdyn,其中Xdyn-动态再结晶率,σBB-动态再结晶进入稳态时应力。X46级管线钢(%:0.07C-0.97Mn-0.33Si-0.018Nb)工业轧制时轧制压力的实测数据与该模型预测数据吻合良好。 相似文献
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根据实际转炉建立几何模型。以有限元为手段,分析了在空气自然对流和热幅射条件下,转炉炉衬不断烧损时炉帽部分的温度场分布。以便为生产操作提供依据。 相似文献
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简要分析了现代化双机架炉卷轧机的分开式和串列式两种常见的布置形式、各自的特点和设备构成,对两种布置形式进行了比较,同时根据经验就生产不锈钢与特殊合金钢和碳钢与低合金钢的双机架炉卷轧机的布置形式提出了相应的见解。 相似文献
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采用MSC.Marc有限元软件和接触分析技术,对TC4钛合金(%:0.08C、6Al、4V、0.3Fe、0.05N、0.015H,余量Ti)Φ32 mm棒材在平三角孔型中的三维热变形过程进行了模拟仿真,并定量分析了轧件温度场的变化。结果表明,开轧温度950℃时,TC4棒材在平三角孔型中稳定轧制,变形均匀,但沿横断面温度出现梯度,最低温度910℃,最高966℃。 相似文献
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针对轧钢厂GCr15轴承钢240 mm × 240 mm方坯粗轧阶段轧辊磨损较严重的情况,采用Archard磨损数学模型模拟分析了轧件压下量、轧辊硬度、热传导系数及摩擦因子在一道次成形后对轧辊磨损规律的影响。模拟结果表明,轧辊硬度越高,轧辊抗磨损能力越强;热传导系数对轧辊磨损的影响较小;当摩擦因子f>0.25时,其摩擦因子对轧辊磨损量变化明显;当轧件压下量在△h<50 mm 时,轧件压下量对轧辊的磨损量影响显著。根据所得结果,结合现场轧制工艺和轧辊材质,将使用的球墨铸铁Ⅰ轧辊[抗拉强度≥400 MPa,硬度HRC值40,热传导系数18 kW/(m2·℃),摩擦因子0.3]改成球墨铸铁Ⅱ轧辊[抗拉强度≥500 MPa,硬度HRC值45,热传导系数17kW,/(m2·℃),摩擦因子0.2],并将压下量由70 mm降至50 mm,使轧辊单槽过钢量由优化前10000 t提高至优化后的18000~20000 t。 相似文献
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统计分析表明,电气控制和工艺原因是引起断带的主要因素,其次为起车、来料缺陷和操作等原因造成的断带。通过相应采取控制原料质量、改进圆盘剪工艺参数、优化轧制模型、修改GCS和起车控制方式等改进措施,使双机架冷轧机断带事故发生率降低了65%以上。 相似文献
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Finite Element Simulation of Hot Strip Continuous Rolling Process Coupling Microstructural Evolution 总被引:2,自引:0,他引:2
Using the nonlinear rigid viscoplastic finite element method (FEM), a finite element simulation of the hot strip continuous rolling process was done, which completely integrates different phenomena such as the metallurgical behavior of the strip and the thermo mechanics in the strip based on the physical metallurgical microstructural evolution law. By combining with the process parameters of certain 2 050 mm hot strip rolling, an actual rolling process of low carbon steel SS400 was simulated using the FEM model. Based on the simulation results, the distributions of the strain field, the temperature field, and the microstructure were presented. Meanwhile, the simulated rolling force, temperature, and microstructure are in good agreement with the measured results. 相似文献
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采用三维热力耦合弹塑性有限元软件及其接触分析技术,在准确制定相关边界条件基础上对φ200mm规格的热作模具钢二机架热连轧过程的金属三维流动进行了有限元模拟,准确地计算了力学参数(如轧制力和力矩)的分布情况并对轧辊强度进行了分析,从中确定了安全可行的轧制方案. 相似文献
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The program was developed by finite element method to calculate the temperature distribution in hot strip rolling. The heat transfer coefficient of air cooling, water cooling and thermal resistance between work roll and strip were analyzed. A new heat generate rate model was proposed according to the influence of source current density, work frequency, air gap and distance to edge on induction heating by finite element method (FEM). The heat generate rate was considered into the thermal analysis to predict the temperature distribution in the induction heating. The influence of induction heating on the strip temperature was investigated with different strip thicknesses. The temperature difference became more and more obvious with the increase of thickness. The strip could be heated quickly by the induction heating both in surface and center because of the thermal conductivity and skin effect. The heat loss of radiation has important influence on the surface temperature. The surface temperature could be heated quickly with high frequency when the strip is thicker. 相似文献
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研制了基板-10mm厚成分(%)为0.15~0.20C,0.8~1.5Mn的16Mn钢板与复板-成分(%)为0.6~1.0C,0.5~1.0Si,0.8~1.2Mn,0,5~1.5Cr,0.4~0.6Ni,0.4~0.8Mo,0.005~0.015B,0.05~0.10Y,0.08~0.15K,0.08~0.15Na的耐磨钢板经爆炸焊接工艺制成钢管热连轧机架耐磨复合衬板。复合衬板试验和应用结果表明,钢板复层表面硬度HRC60,结合层剪切强度340MPa,使用8月个后的磨损量小于0.2mm,比常用表面处理衬板和轧制复合衬板磨损量低2倍以上。 相似文献
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铝板带热连轧的温度控制对带材质量起着十分重要的作用。目前国外在热连轧机上已普遍采用以数学模型为基础的温度控制系统,对精轧机组的穿带速度及机架间冷却液进行预设定,然后用测温计测值与目标值进行比较,实现闭环反馈控制,通过控制轧制速度及冷却液的流量来控制带材的温度。本文论述了热连轧机温度控制系统的组成,分析了控制温度的方法及过程。 相似文献