U75V钢轨轧制模拟物性参数的测定及研究  

Determination and Study of Physical Parameters of U75V Rail Rolling Simulation

作　　者：李波[1] 朱国明[1] 康永林[1] 裴暖暖[1] 陶功明 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]攀钢集团攀枝花钢钒有限公司,四川攀枝花617000

出　　处：《热加工工艺》2014年第17期24-28,共5页Hot Working Technology

基　　金：国家"八六三"计划资助项目(2013AA031601)

摘　　要：对U75V钢轨钢变形模拟所需物性参数进行了测定及研究。利用热模拟试验机研究了不同的温度、应变速率、应变下的变形抗力,确定了U75V钢变形抗力的数学模型。经过理论计算与试验数据的对比,发现误差较小。采用顶杆法测量了U75V钢轨钢的各个温度区间内的平均热膨胀系数;采用非稳态法测量了U75V钢的热扩散率和热导率,利用待测样品与参考样品比较的方法测量了比热容;利用动态测量方法—敲击共振法测量了U75V钢的杨氏模量、剪切模量和泊松比。这些物性参数可以为工艺计算和数值模拟提供重要参考。Physical parameters required in U75V rail steel deformation simulation were studied and determined.Deformation resistances under different temperatures, strain rates and strains were researched by thermal simulation testingmachine. The mathematic model of U75V steel deformation resistance was ascertained. Through the comparison betweentheoretical calculation and experimental data, it was found that the error was little. Average coefficients of thermal expansionunder different temperature ranges of U75V rail steel were determined by using push rod dilatometer. Thermal diffusivity andthermal conductivity were measured by using non-steady state method, and specific heat capacity was determined by using themethod of comparison of sample to measure and the reference sample. Young modulus, shear modulus and Poisson ratio weremeasured by using dynamic measuring method-knocking resonance method. These physical parameters can provide importantreference for process calculation and numerical simulation.

关 键 词：物性参数 变形抗力模型 热膨胀系数 杨氏模量 数值模拟 

分 类 号：TG113.2[金属学及工艺—物理冶金]