60Si2CrV弹簧钢的热变形行为及流变应力模型研究

Investigation on Hot Deformation Behavior and Flow Stress Model of 60Si2CrV Spring Steel

利用Gleeble-3800型热模拟机对60Si2CrV弹簧钢进行了不同条件的高温单道次压缩试验。研究了热变形抗力与变形温度、应变速率及真应变之间的关系,并经回归得到了60Si2CrV弹簧钢的动态再结晶参数模型和热变形抗力模型。结果表明:动态再结晶在较高的温度和较低的应变速率下发生,试样的热变形抗力均随温度的升高而降低,随应变速率的增大而增大。通过热变形抗力模型计算的结果和试验结果吻合良好。

The high-temperature single pass compression tests of 60Si2CrV spring steel was done by using Gleeble-3800 thermo-mechanical simulator. The relationships between thermal deformation resistance and deformation temperature, strain rate and true strain were investigated. The dynamic recrystallization parameters model and thermal deformation resistance model of 60Si2CrV spring steel were obtained by regression. The results show that dynamic recrystallization occurs at high temperature and low strain rate. The deformation resistances of the specimens decrease with increase of temperature, and increase with the increase of strain rate. The results calculated by thermal deformation resistance model are in good agreement with experiment results.