Fe-28Mn-10Al-0.8C的热压缩行为及微观组织结构转变  

Hot Deformation Behavior and Microstructure Evolution of Fe-28Mn-10Al-0.8C Low Density Steel

作　　者：丰园海 郑双昱 罗翔[1] 种晓宇 FENG Yuanhai;ZHENG Shuangyu;LUO Xiang;CHONG Xiaoyu(National-Local Joint Engineering Laboratory for Technology of Advanced Metallic Solidification Forming and Equipment,Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院、金属先进凝固成形及装备技术国家地方联合工程实验室,云南昆明650093

出　　处：《铜业工程》2023年第2期50-60,共11页Copper Engineering

基　　金：国家自然科学基金项目(52001150)资助。

摘　　要：通过Gleeble-3500热模拟机研究了铸态Fe-28Mn-10Al-0.8C低密度高强钢在850~1050℃温度范围和0.01~10 s^(-1)应变速率范围内的热压缩行为和组织转变。实验结果表明,Fe-28Mn-10Al-0.8C钢的动态回复(DRV)和动态再结晶(DRX)行为与变形温度、应变和应变速率直接相关。基于双曲正弦函数和线性拟合,实验钢的可用活化能(Q)为454.64 kJ/mol。给出了实验钢在热压缩变形过程中的组织演变和动态再结晶过程:变形温度的升高或应变速率的降低,可促进奥氏体的动态再结晶和晶粒长大;随着应变速率的增加,会得到更细小的奥氏体动态再结晶晶粒。The hot compression behavior and microstructural transformation of as-cast Fe-28Mn-10Al-0.8C low density and high strength steel was researched at the temperature range of 850~1050℃and the strain rate range of 0.01~10 s^(−1) on the Gleeble-3500 thermal simulation machine.According to the experimental results,the dynamic recovery(DRV)and the dynamic recrystallization(DRX))behavior of Fe-28Mn-10Al-0.8C steel were directly related to the deformation temperature,strain and strain rate.On the basis of hyperbolic sine function and linear fitting,the available activation energy(Q)of the experimental steel was 454.64 kJ/mol.The microstructure evolution and dynamic recrystallization process of experimental steel during hot compression deformation were given as with the increase of deformation temperature or the decrease of strain rate,the dynamic recrystallization and grain growth of austenite would be promoted;with the increase of strain rate,finer austenite dynamic recrystallization grains would be obtained.

关 键 词：Fe-Mn-Al-C合金 热压缩行为 微观结构转变 本构方程 Z参数方程 

分 类 号：TG142.3[一般工业技术—材料科学与工程]