摘要
采用Gleeble3500热模拟试验机对ER70S-6焊丝钢在应变速率0.01、0.1、1、10 s^(-1)及变形温度1000、1050、1100、1150、1200℃条件下进行压缩试验。研究发现:升高温度和降低应变速率均会造成流变应力不同程度的减小。基于Z参数和线性拟合的方法,利用Arrhenius双曲正弦方程建立ER70S-6焊丝钢的本构方程,并算出激活能Q=313.821k J/mol。最后对比本构方程计算的预测值与实验值,结果表明:预测值与实验值吻合良好,平均相对误差约为4.52%,线性相关度约为0.995,相对误差低于10%的样本数占总量的95%。构建的本构方程可以用来预测ER70S-6焊丝钢的变形抗力和作为有限元数值模拟的材料模型。
The compression tests of ER70S-6 welding wire steel at strain rate of 0.01, 0.1, 1, 10 s^(-1)and deformation temperature of 1000, 1050, 1100, 1150 and 1200 ℃ were carried out by using Gleeble 3500 thermal simulation testing machine. It is found that increasing temperature and decreasing strain rate can reduce the flow stress in different degree. Based on Z parameter and linear fitting method, the constitutive equation of ER70S-6 steel was established by Arrhenius hyperbolic sine equation, and the activation energy Q is 313.821 kJ/mol. Finally, comparing the predicted and experimental values of the constitutive equation, the results show that the predicted values are in good agreement with the experimental values, the average relative error is about 4.52%, the linear correlation is 0.995, and the number of samples with relative error less than10% accounts for 95% of the total samples. The constitutive equation can be used to predict the deformation resistance of ER70S-6 welding wire steel and as a material model for finite element numerical simulation.
作者
侯炳杰
郑小平
刘倩
肖广耀
田亚强
陈连生
HOU Bingjie;ZHENG Xiaoping;LIU Qian;XIAO Guangyao;TIAN Yaqiang;CHEN Liansheng(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;Tangshan Medium and Heavy Plate Co.,Ltd.,Tangshan 063600,China)
出处
《热加工工艺》
北大核心
2022年第17期106-110,115,共6页
Hot Working Technology
基金
河北省自然科学基金高端钢铁联合基金项目(E2018209278)
河北省高等学校科学技术研究项目(ZD2019064)。
关键词
ER70S-6焊丝钢
热变形
本构方程
流变应力
ER70S-6 welding wire steel
hot deformation
constitutive equation
flow stress