摘要:以一种具有潜力的汽车用低密度钢(Fe-11Mn-10Al-0.9C)为研究材料,在Gleeble-1500热模拟试验机上进行单道次压缩实验.在真应力-应变曲线的基础上,分析了变形程度、变形温度和应变速率对Fe-11Mn-10Al-0.9C低密度钢变形抗力的影响,建立了实验钢的变形抗力模型.预测值与实验值的平均相对误差仅为4.12%,证实了本文建立的变形抗力模型具有较好的拟合特性和预测精度.基于动态材料模型,建立热加工图,结合热变形组织进行分析.结果表明:当变形温度为950~1100℃、应变速率0.01~1s^-1时,再结晶过程充分发展,为Fe-11Mn-10Al-0.9C低密度钢的最佳热加工工艺区间.
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