AZ31镁合金差温热轧过程的晶粒细化  

Grain refining of AZ31 magnesium alloy during temperature-differential hot rolling

作　　者：钱鹏[1] 胡连喜[1] 苗青[1] 王尔德[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《塑性工程学报》2009年第4期121-124,共4页Journal of Plasticity Engineering

摘　　要：实验研究了经不同道次差温热轧AZ31镁合金的金相组织,结合对轧制过程,尤其是轧件温度场的数值模拟结果,分析了AZ31镁合金差温热轧过程晶粒细化机制与主要影响因素,获得了通过轧制过程动态再结晶,使轧材晶粒尺寸随轧制道次增加,而持续细化的工艺参数,并制备出平均晶粒尺寸为5μm左右的细晶AZ31镁合金板材。The microstructure of AZ31 magnesium alloy after various passes of temperature-differential hot roiling was investigated. Combined with simulation results for the rolling process, especially the temperature field distribution within the workpiece, the mechanism for grain refining of AZ31 magnesium alloy during temperature-differential hot rolling and the main influencing factars were discussed, and the optimal process parameters, by which the grain size can be refined steadily with increasing rolling passes due to dynamic recrystallization, were obtained. With the use of the optimal process parameters, fine grained AZ31 magnesium alloy sheets with an average grain size of about 5μm were fabricated.

关 键 词：AZ31镁合金 轧制 数值模拟 晶粒细化 

分 类 号：TG339[金属学及工艺—金属压力加工]