锻态18Cr2Ni4WA钢高温变形本构模型研究  

Research on High Temperature Deformation Constitutive Model for As-forged 18Cr2Ni4WA Steel

作　　者：段兴旺[1] 贺林峰 焦永星 王敏[1] DUAN Xing-wang;HE Lin-feng;JIAO Yong-xing;WANG Min(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024

出　　处：《太原科技大学学报》2025年第1期53-57,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省高等学校科技创新项目(2021L294)。

摘　　要：在Gleeble-1500热模拟试验机上,对锻态18Cr2Ni4WA钢进行单道次热压缩实验,研究了该钢的高温流变行为。通过采集数据获得了实验温度为(1123~1473)K、应变速率为(0.001~0.1)s^(-1)和变形量为55%的变形条件下的真应力-真应变曲线。以Arrhenius本构模型为依据,并充分考虑应变对本构模型的作用,建立了应变补偿Arrhenius本构模型,用以预测其高温流变行为。结果表明:温度的降低和应变速率的增大导致锻态18Cr2Ni4WA钢的真应力增加;通过将所建立本构模型的理论预测数据与实验数据进行对比,发现吻合度较好,说明所建立的锻态18Cr2Ni4WA钢应变补偿Arrhenius本构模型具有较高的预测精度。The single pass hot compression tests of the as-forged 18Cr2Ni4WA steel were carried out with the Gleeble-1500 thermal simulator,and the high temperature deformation behavior of the steel was studied.The true stress-true strain curves were obtained by collecting data under the deformation conditions of experimental temperature of(1123~1473)K,strain rate of(0.001~0.1)s^(-1),and deformation of 55%.Based on the Arrhenius constitutive model and fully considering the influence of strain on the constitutive model,a strain compensated Arrhenius constitutive model was established to predict its high temperature flow behavior.The results show that the true stress of the as-forged 18Cr2Ni4WA steel increases with the decrease of deformation temperature and the increase of strain rate.By comparing the theoretical prediction data of the established constitutive model with the experimental data,it is found that the consistency is good.It shows that the strain compensated Arrhenius constitutive model for the as-forged 18Cr2Ni4WA steel has a high prediction accuracy.

关 键 词：锻态18Cr2Ni4WA钢 热压缩 本构模型 应变补偿 

分 类 号：TG142.4[一般工业技术—材料科学与工程]