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在Gleeble-1500热模拟试验机上对M35高速钢进行了热压缩试验,研究了变形温度在950~1150℃、变形速率为0.01~10s~(-1)时M35高速钢的热变形行为,建立了热变形本构方程和热加工图。结果表明:M35高速钢热压缩过程中的变形行为可用双曲正弦函数来表征,其平均变形激活能为333.04kJ·mol~(-1)。通过热加工图直观地展现出了M35高速钢热变形失稳的区域,并且获得了实验条件下其热变形过程的最优工艺制度,即热加工温度为1 100℃,应变速率为0.01s~(-1)。
The hot compression tests of M35 high speed steel were carried out on a Gleeble-1500 thermal simulation machine. The thermal deformation behavior of M35 high speed steel was studied at a deformation temperature of 950 ~ 1150 ℃ and a deformation rate of 0.01 ~ 10s ~ (-1) Thermal deformation constitutive equation and hot working diagram. The results show that the deformation behavior of M35 high speed steel during hot compression can be characterized by hyperbolic sine function with an average activation energy of 333.04 kJ · mol ~ (-1). The thermal deformation instability region of M35 high speed steel was visualized by the thermal processing diagram, and the optimal technological process of the thermal deformation process under the experimental conditions was obtained, that is, the thermal processing temperature was 1 100 ℃ and the strain rate was 0.01s ~ (-1).