铸态AZ31B镁合金热变形研究  

Research on Thermal Deformation of Cast AZ31B Alloy

作　　者：庞志宁[1] 马立峰[1] 马自勇 贾伟涛[1] 

机构地区：[1]太原科技大学山西省冶金设备设计与重点技术实验室,山西太原030024

出　　处：《热加工工艺》2014年第4期113-116,共4页Hot Working Technology

摘　　要：以铸态AZ31B镁合金材料为基础,采用Gleeble-1500D热变形模拟试验机对铸态AZ31镁合金在250、300、350、400℃,应变速率0.005、0.05、0.5 s-1条件下的再结晶行为进行研究,建立了热变形方程,再结晶运动学模型、晶粒尺寸模型。结果表明:在较高温度或较低应变速率下可得到较为细小的晶粒,从而对减小晶界处的孪晶位错密度,为后期轧制铸轧镁板生产过程中降低边裂产生的概率提供依据。The compression test on Gleeble-1500D thermal deformation simulator was carried out to study the dynamic recrystallization behavior of cast AZ31B alloy at 250℃, 300 ℃, 350 ℃, 400 ℃, and the strain rate of 0.005 s-1, 0.05 s-1, 0.5 s-1, and then, the equation of thermal deformation, dynamic recrystallization Kinematic model and grain size model were established. The results show that the relatively small grain appears under higher temperature or lower strain rate, which can reduce the density of twin dislocation, provide theoretical basis for rolling cast magnesium plate＇s production and reduce the probability of edge cracks in later.

关 键 词：AZ31B镁合金 动态再结晶运动学模型 晶粒尺寸模型 位错密度 

分 类 号：TG146.22[一般工业技术—材料科学与工程]