超高强度钢AF1410的高温变形本构方程及热加工图  

High Temperature Deformation Constitutive Equation and Hot Processing Map of Ultra-high Strength Steel AF1410

作　　者：汤伟[1] 袁武华[2] 朱志飞 

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411101 [2]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《热加工工艺》2017年第23期129-133,共5页Hot Working Technology

摘　　要：在Gleeble-3800热模拟试验机上对AF1410钢进行了热压缩试验,研究了该材料在变形温度850~1150℃、应变速率0.001~1 s^(-1)、真应变量0.9下的热变形行为。采用双曲正弦函数建立了AF1410钢含应变量的热变形本构方程,根据动态材料模型建立并分析了热加工图,同时分析了其热变形显微组织。研究表明:在热变形过程中,AF1410钢试样发生了不同程度的动态再结晶,随着温度的升高,发生动态再结晶的驱动力逐渐降低。材料热变形参数与应变量可以用高次函数表示,而且具有很好的相关性。从热加工图中获得该材料最佳热加工参数是:变形温度1050~1150℃、应变速率0.007~0.36 s^(-1)。Hot compression test of AF1410 steel was carried out on Gleeble-3800 thermal simulator. The hot deformation behavior of the material at deformation temperature of 850-1150℃, strain rate of 0.001-1 s1 and true strain of 0.9 was investigated. The constitutive equation of thermal deformation of AF1410 steel with strain was established by hyperbolic sine function. Based on the dynamic material model, the hot processing maps were established and analyzed. The microstructure of hot deformation was also analyzed. The results show that the dynamic recrystaUization of AF1410 steel occurs in different degrees during hot deformation. With the increase of temperature, the driving force of dynamic recrystallization gradually decreases. The thermal deformation parameters and strain variables of the material can be expressed by high order functions, and they have good correlation. The best thermal processing parameters of the material obtained from hot processing map are the deformation temperature of 1050-1150℃, and the strain rate of 0.007-0.36 sl.

关 键 词：AF1410钢 本构方程 热加工图 动态再结晶 

分 类 号：TG306[金属学及工艺—金属压力加工] TG146.31[一般工业技术—材料科学与工程]