F35MnVN非调质钢高温本构模型对比研究  

Comparative study on two types of constitutive model in F35MnVN microalloyed forging steel

作　　者：王进[1] 褚忠[1] 李君飞[1] 张琦[1] 

机构地区：[1]青岛理工大学机械工程学院,山东青岛266033

出　　处：《材料科学与工艺》2012年第5期143-148,共6页Materials Science and Technology

基　　金：山东省自然基金(ZR2010EQ027)

摘　　要：采用Gleeble-3800热模拟实验机对F35MnVN非调质钢在温度范围为950～1 200℃,应变速率范围为0.01～5 s-1进行等温、等应变速率压缩变形.依据所获得的流动应力曲线,拟合获得中间参数表达式,分别获得动态回复-动态再结晶型和Arrhenius方程型两种本构模型.分别统计计算两种模型的预测值与实验值之间的相关系数和相对误差,表明Arrhenius方程型本构模型具有更高的精度,且该模型形式简单,更适合用于F35MnVN钢热锻造过程的数值模拟.Isothermal hot compression tests of F35MnVN steel were performed on a Gleeble-3800 thermo-me- chanical simulator in the temperature of 950 ～1200 ℃ and the strain rate range of 0.1 ～ 10 s-1 to obatin the flow stress curves. Dynamic recorvery and dynamic recrystallizationtype and Arrheniustype constitutive models were established respectively. Standrad statistical parameters such as as correlation coefficient and avergae absolute relative error were employed to quantify the predictability of the two models. The calculation results indicate the Arrheniustype constitutive model has high accuracy and suits to be used in hot foring simulation for F35MnVN steel.

关 键 词：F35MnVN 非调质钢 流动应力 本构模型 

分 类 号：TG142[一般工业技术—材料科学与工程]