高层建筑用钢的热塑性变形行为研究  

Study on Thermoplastic Deformation Behavior of Construction Steel for High-rise Building

作　　者：由尧[1] YOU Yao(Department of Construction Engineering,Huaibei Vocational and Technical College,Huaibei 235000,China)

机构地区：[1]淮北职业技术学院建筑工程系,安徽淮北235000

出　　处：《成都工业学院学报》2022年第4期42-48,共7页Journal of Chengdu Technological University

基　　金：安徽省级重点科研项目(KJ2019A0993);淮北职业技术学院重点教研项目(2019jyxm-05)。

摘　　要：在Gleeble-3800热模拟试验机上对Q460高建钢进行热压缩试验,研究变形温度和应变速率对Q460钢动态再结晶行为的影响,建立Q460钢动态再结晶模型。结果表明,通过热模拟可以得到Q460钢的真应力-应变曲线、动态再结晶动力学方程、运动学方程和再结晶晶粒尺寸方程,Q460钢的动态再结晶体积分数会随着变形温度和变形速率的不同而发生变化,要想获得具有较高体积分数的动态再结晶,在实际热加工过程中可以选择较高的变形温度和较小的应变速率,且变形温度和变形速率的控制可以对Q460钢的再结晶晶粒尺寸进行预测。The hot compression test of Q460 steel for high-rise building was carried out on Gleeble-3800 thermal simulation machine.The effects of deformation temperature and strain rate on the dynamic recrystallization behavior of Q460 steel were studied,and the dynamic recrystallization model of Q460 steel was established.The results show that the true stress-strain curve,dynamic recrystallization kinetic equation,kinematic equation and recrystallization grain size equation of Q460 steel can be obtained by thermal simulation.The dynamic recrystallization volume fraction of Q460 steel will change with the deformation temperature and deformation rate.In order to obtain dynamic recrystallization with higher volume fraction,it is necessary to obtain the dynamic recrystallization with higher volume fraction in the actual hot working process.The recrystallization grain size of Q460 steel can be predicted by selecting higher deformation temperature and lower strain rate and controlling deformation temperature and deformation rate.

关 键 词：Q460高建钢 变形温度 变形速率 动态再结晶 本构方程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]