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采用恒应变速率凸轮式压缩试验机对8种合金结构钢的流动应力进行了实验研究。其变形温度(T)、应变速率((?))及变形程度(ε%)分别为850—1150℃,5—80s~(-1)及5—69%。分析了变形温度、变形程度及应变速率对流动应力(σ)的影响。通过对变形温度影响项具有两种表达式的流动应力数学模型的非线性回归分析及比较,提出了拟合精度较高的8个合金结构钢流动应力的数学模型,并给出了数学模型的回归系数值。
The flow stress of 8 kinds of alloy structural steels was experimentally studied by constant strain rate cam compression testing machine. The deformation temperature (T), strain rate (?) And degree of deformation (ε%) are 850-1150 ℃, 5-80s -1 and 5-69%, respectively. The effects of deformation temperature, degree of deformation and strain rate on the flow stress (σ) were analyzed. Through the nonlinear regression analysis and comparison of the flow stress mathematical model which has two kinds of expressions when the deformation temperature is affected, a mathematical model of the flow stress of 8 alloy structural steel with higher fitting accuracy is proposed and the mathematical model Regression coefficient value.