51CrV4弹簧钢的高温塑性变形行为及本构模型研究  

Research on High Temperature Plastic Deformation Behavior and Flow Stress Model of 51CrV4 Spring Steel

作　　者：赖朝彬[1] 黄伟 李声慈 刘涛[2] 吕瑞国[2] 唐小勇[2] 喻建林 LAI Chaobin;HUANG Wei;LI Shengci;LIU Tao;LYU Ruiguo;TANG Xiaoyong;YU Jianlin(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;XinSteel Industrial Co.,Ltd.,Technology Center,Xinyu 338001,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]新余钢铁集团有限公司技术中心,江西新余338001

出　　处：《热加工工艺》2021年第24期57-60,共4页Hot Working Technology

基　　金：中国博士后科学基金项目(2020T130556);江西省自然科学基金项目(20202BAB214004)。

摘　　要：采用Gleeble-3800热模拟机对51CrV4弹簧钢进行热压缩变形试验。研究了变形温度和变形速率对材料流变应力演变规律的影响,建立了高温热压缩本构模型。结果表明:51CrV4钢热压缩变形过程中峰值流变应力随变形温度的增大而减小,随变形速率的增大而增大;51CrV4钢在变形温度1000℃,变形速率0.1 s^(-1)条件下会发生动态再结晶;建立了变形抗力随变形量、变形温度和变形速率变化的模型,该模型预测的流变应力与试验值基本吻合。Gleeble-3800 thermal simulator was used to conduct the hot compression deformation tests for 51CrV4 spring steel.The effects of deformation temperature and strain rate on the evolution of flow stress were studied,and a high-temperature hot compression constitutive model was established.The results show that the peak flow stress decreases with the increase of deformation temperature,and increases with the increase of strain rate during the hot compression deformation;dynamic recrystallization phenomenon occurs in 51CrV4 steel under the conditions of 1000℃deformation temperature and 0.1 s^(-1) deformation rate;a constitutive model considering strain,deformation temperature and strain rate is established,and the flow stress predicted by the model is consistent with the experimental data.

关 键 词：51CrV4弹簧钢 热压缩变形 流变应力 本构模型 

分 类 号：TG142.45[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]