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Metal Pass 轧钢厂相关项目
 

VII

轧制过程模拟-数字法模拟

编号

项目名称

项目介绍

客户

54

用扭转试验对流变应力的测定

Flow stress [流变应力] of Steel DIN 19Mn6 was measured [测量] at 850˚C, 900˚C, 950˚C and 1000˚C, strain [应变] of 0.05 to 0.75, and strain [应变] rate [应变速度] of 0.05 to 5/s. measured [测量] data [数据] was used to formula [公式]te a mathematical model [模型] for the flow stress [流变应力], considering the temperature [温度] rise during the torsion test [扭转试验] predicted [预报的] by FEM [有限元] simulation [模拟].

DFG

55

有限元模拟以确定钢在扭转测试过程中的温度分布

FEM [有限元] simulation [模拟] of the torsion test [扭转试验] was used to measure [测量] the flow stress [流变应力]. This is to study the actual temperature [温度] profile [温度形态] in every stage of the torsion test [扭转试验]. Due to the heat generation, the actual temperature [温度] is higher than the initial [初始] temperature [温度]. This may cause the difference of the temperature [温度] pattern [模式] between the torsion sample [试样] and the sample [试样] for the hot rolling [轧制] and, thus cause the error [误差] of the FEM [有限元] simulation [模拟] of the rolling [轧制] process [轧制过程]. In prior FEM [有限元] modeling [模拟] this negative factor was removed.

DFG

56

杨氏模量的测量

The E-Modulus [杨氏模量] for steel was heavily temperature-dependent [随温度而变的], so the E-Modulus [杨氏模量] for steel 19Mn6 used for the FEM [有限元] investigation [研究] for the angle steel [角钢] rolling [角钢轧制] was measured [测量] at various temperature [温度], from 200˚C to 1200˚C. A formula [公式] modeled [建模] with the measured [测量] data [数据] in the temperature [温度] range 850˚C to 1000˚C was used for the FEM [有限元] calculation for the angle steel [角钢] rolling [角钢轧制].

DFG

57

有限元对平板轧制基于热机械 模型的模拟

This wass a pre-simulation [模拟] for the angle steel [角钢] simulation [模拟]. Due to the high technical challenge of the thermo-mechanical [热机械] modeling [模拟] of the angle steel [角钢] rolling [角钢轧制], a hot rolling [轧制] model [模型] for the flat rolling [平棍轧制] [平辊轧制] was established at first. rolling [轧制] parameters [轧制参数] for the FEM [有限元] model [模型] corresponded [对应] to the hot flat rolling [平棍轧制] [平辊轧制] tests [试验]. Calculated data [数据] were compared with the test [试验] results, so the model [模型] was verified [验证] and improved.

DFG

58

有限元应用热机械 模型对6道的角钢轧制的分析

The input file [文件] consisted of the data [数据] for mesh [网格] generation, Material [材料] data [数据] and boundary condition [边界条件], rolling [轧制] parameters [轧制参数], Parameter [参数] relating to the output (out-file [文件], post file [文件] and restart file [文件]), special control Parameter [参数] for FEM [有限元] calculations (such as convergence error [误差] for temperature [温度] and stress or displacement, time step for each increment [增量]), etc. The rolls [辊] and stock [轧件] were taken into account separately as rigid and elastic-plastic [塑性]. At first, the initial [初始] cross section [断面] of a groove [孔型] was estimated. The inputs were the flow stress [流变应力] formula [公式], temperature [温度] dependence [随温度变化的] of E-Modulus [杨氏模量], specific heat [比热], thermal conductivity [热传导], coefficient [系数] of thermal expansion [热膨胀] [热膨胀系数] and mass density [密度], etc. The directly calculated outputs were rolling [轧制] force [轧制力], rolling [轧制] torque [力矩], elastic [弹性] and plastic [塑性] strain [应变], elastic [弹性] and plastic [塑性] strain [应变] rate [应变速度], plastic [塑性] work, shape [形状] of deformation [变形] zone [变形区], stress and temperature [温度] distribution [分布], as well as the stock [轧件] geometry [轧件几何形状] during and after rolling [轧制]. The definitions for partial upsetting [局部压下], partial spread [局部宽展] and partial elongation [局部延伸] were provided as input into the MARC main program through a user subroutine [子程序], so those forming technical Parameter [参数] were also calculated. Both integrated and local [局部] metal flow [金属流动], as well as the force [轧制力] and power [功率], showed an excellent agreement of the measured [测量] and calculated results.

DFG

59

有限元应用热机械 模型对H-梁热轧的分析

H-beam rolling [轧制], starting with the cast [铸造] profile [文件], was analyzed for the example of rolling [轧制] of IPE140. The pass [道次] sequence [道次系列] consisted of three universal and two edging passes [侧轧道次] in a continuous mill [连续轧机]. The rolling [轧制] process [轧制过程] [轧制过程] of three universal pass [万能道此] in a continuous mill [连续轧机] were simulated. rolling [轧制] parameters [轧制参数] for the simulation [模拟] corresponded [对应] to those of a practical rolling [轧制] test [试验]: initial [初始] temperature [温度] was 1000 – 1015°C, and rolling [轧制] speed [速度] was 4 – 6 m/s, etc. The model [模型] was improved by comparison [对比] of the measured [测量] and predicted [预报的] Parameter [参数].

DFG

60

有限元对铸带液芯铸轧的模拟

A study of the cast-rolling [铸轧] process [轧制过程] of a thin slab [板坯] with a liquid core. At first, the cooling [冷却] process of the cross-section [横断面] from liquid state of 1394°C to a state with a thickness of solid shell of 10mm, 15mm, 20mm, 25mm, respectively, was studied by Mean [平均] of two-dimensional finite element simulation [模拟] in which the liquid-solid interface was determined. Then the three-dimensional simulation [模拟] of workpieces [工作件] with corresponding thicknesses of the solid shell was carried out, in which the workpieces [工作件] were simplified to hollow [中空的] bodies. mesh [网格] of the cross section [断面] with each wall thickness was optimized. A comparison [对比] of the analytical results with those of experiments described in the literature [文献] followed for each calculation.

DFG

61

只需5%计算时间的简化有限元模型的建立

After studies of the relative movement of the stock [轧件] and the rolls [辊], a special upsetting [设定] model [锻压模型] for shape [形状] Rolling [型钢轧制] [型钢轧制] simulation [模拟] was developed [开发] through a functional combination of the slab [板坯] method and the FEM [有限元], with direct modeling [模拟] of the speed [速度] and the deformation [变形] pattern [模式] in the length direction [长度方向]. The simulation [模拟] of an angle rolling [角钢轧制] pass [道次] was performed in only 5% of computing time of the regular model [模型], with sufficient accuracy [准确度]. (Due to the great interest in this simplified model [简化模型] from industry, German colleagues spent another year to further study it, after the initial [初始] Development [开发]). The study was financed by DFG. There was a great potential [潜力] for this simplified model [简化模型] to be integrated into a roll [轧辊] pass [道次] design [孔型设计] program or a Level 2 [二级系统] model [二级模型], to describe the microstructure [微观组织] Parameter [参数] over the stock [轧件] cross section [断面].

DFG

62

有限元对圆-椭圆和椭圆-圆轧制过程的分析以确定轧制力,温度,晶粒尺寸和再结晶

Data [数据] for the simulation [模拟] was provided from Morgan [摩根]’s lab mill [试验轧机] data [数据]. A microstructure [微观组织] model [模型] was developed [开发] and provided to the FEM [有限元]. The percentage of completion of the recrystallization [再结晶] and recrystallized [再结晶过的] grain size [晶粒尺寸], etc. were predicted [预报的] and graphical [图形]ly plotted [描绘], besides regular Parameter [参数] such as force [轧制力] and temperature [温度].

Morgan

 

    项目分类清单 (客户名注释)

     1.  二级系统开发
     2. 二级系统支持
     3.  力学性能改进
     4.  钢厂应用软件开发
     5.  产量的提高
     6.  轧制和道次规程开发
     7.  轧制过程模拟-数字法模拟
     8.  轧制过程模拟-经验公式模拟
     9.  产品形状和成材率改进
    10. 网路和网路资源

 

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