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用KH计算法编制铜板带压下规程 总被引:3,自引:1,他引:2
提出了编制铜板带压下规程的KH计算法,经过热轧4例和冷轧6例的计算对比,结果表明:KH计算法是可行的,可为今后优化压下规程创造条件,并将产生经济效益。 相似文献
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选择了7种轧制过程进行压下规程的优化;厚板TM轧制、斯泰科尔轧机热带轧制、初轧机厚板立轧和平轧,常规轧机的薄带钢轧制及I.S.P轧制、I.S.P奥氏-铁素体轧制、连铸带钢的轧制。 相似文献
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文章全面介绍了K计算法,并提供编制变形规程用的参数值统计数据,对具体编制变形新规程有一定参考价值。文章对优化变形规程作了初步介绍,规程优化可为生产厂节能、增产和改善产品质量创造条件,是一项投入少、效益好的“软技改”工程。 相似文献
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用厚度减缩系数KH计算法编制有色金属板带材的压下规程。经12例的计算、对比,结果表明:KH计算法是可行的,运算操作简便。 相似文献
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随着对能源利用率和环保要求的不断提高,作为能量消耗大户的钢铁企业越来越重视产能与能耗之间的比值.国内中厚板轧机的利用率,从小时产量到单位能耗比都比较低,尤其是在中厚板生产粗轧阶段,由于设备利用率不够,导致产能低、能源消耗大,直接影响企业经济效益.文章以武钢轧板厂双机组轧机作为研究对象,对产能优化的问题进行了研究. 相似文献
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本文探索了中厚板轧机压下规程自适应的算法。为了比较某些算法的效果,文中对九种算法用实测数据进行了离线计算,结果表明其中(2)~(8)的算法效果较好。并说明了只要动态参数结构合理,增益系数或权值选取恰当,都可收到较好的效果。 相似文献
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For a 230t large steel ingot which is firstly manufactured in one industrial plant, both of the analytical calculation and the numerical simulation methods were adopted to predict the total solidification time based on their own physical and mathematical models. The results showed that the total solidification time calculated by the analytical method was 46.0 h, and that was 40.2 h by the numerical method. Comparing with the actual stripping time of 45.8 h for the 230t large steel ingot, both of the estimated values agreed reasonably well with the actual one. For the purpose of practical utilization, the analytical method tends to be more convenient rather than the numerical one. This study can provide a kind of reference for the prediction on the total solidification time of large steel ingots. 相似文献
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大型环件热辗扩数值模拟与实验研究 总被引:1,自引:0,他引:1
针对应用广泛的大型矩形截面环件,采用DEFORM-3D有限元软件分别选取不同摩擦系数、进给速度,对其辗扩过程进行数值模拟,并进行加工实验,找出了工艺参数的选取范围,分析了轧制过程中产生的问题和缺陷,为实际生产提供了依据。 相似文献
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Stream Surface Strip Element Method and Simulation of Three-Dimensional Deformation of Continuous Hot Rolled Strip 总被引:5,自引:0,他引:5
LIUHong-min WANGYing-rui 《钢铁研究学报(英文版)》2004,11(2):18-24
A new method, the stream surface strip element method, for simulating the three-dimensional deformation of plate and strip rolling process was proposed. The rolling deformation zone was divided into a number of stream surface (curved surface) strip elements along metal flow traces, and the stream surface strip elements were mapped into the corresponding plane strip elements for analysis and computation. The longitudinal distributions of the lateral displacement and the altitudinal displacement of metal were respectively constructed to be a quartic curve and a quadratic curve, of which the lateral distributions were expressed as the third-power spline function, and the altitudinal distributions were fitted in the quadratic curve. From the flow theory of plastic mechanics, the mathematical models of the three-dimensional deformations and stresses of the deformation zone were constructed. Compared with the streamline strip element method proposed hy the first author of this paper, the stream surface strip element method takes into account the uneven distributions of stresses and deformations along altitudinal direction, and realizes the precise three-dimensional analysis and computation. The simulation example of continuous hot rolled strip indicates that the method and the model accord with facts and provide a new reliable engineering-computation method for the three-dimensional mechanics simulation of plate and strip rolling process. 相似文献
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通过实验室热轧机研究了热机械控制工艺(TMCP)对热轧TRIP钢力学性能的影响.结果表明:在热轧变形过程中应变诱导铁素体相变,低温大变形量造成铁素体晶粒细化.随终轧温度的降低和终轧变形量的增加,残余奥氏体的稳定性增加,相变诱发塑性(TRIP)效果更好.在700 ℃终轧且终轧变形量为50%时,抗拉强度、屈服强度和总伸长率分别达到791 MPa,538 MPa和36%的最大值. 相似文献
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提出一种模拟板带轧制过程三维变形的新的数值方法———条层法。首先沿高向将变形区均匀地划分为若干层 ,然后再沿着金属的流动轨迹将变形区内的每层带材划分为若干流线条元 ,为了方便分析和计算 ,又将流线条元映射为矩形条元。横向位移的纵向分布被构造为四次曲线 ,横向分布用三次样条插值函数表示 ,高向分布用二次曲线拟合。根据塑性力学流动理论 ,分析推导了变形区三维变形和应力的数学模型。与本文作者曾经提出的流线条元法相比 ,考虑了应力与变形沿高向的不均匀分布 ,实现了精确的三维分析和计算。关于热带钢连轧和厚板轧制的仿真实例表明 ,提出的方法和模型符合实际 ,为板带轧制过程的三维力学仿真提供了一个新的实用工程数值方法。 相似文献
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推荐了基于轧件厚度减缩系数KH的热轧道次温降计算公式,与实测数据对比,能较好地均衡符合实际情况,能为优化热轧压下规程创造条件。 相似文献