退火处理对AZ31镁合金轧制板材组织与冲压性能的影响  

Influence of Annealing Heat Treatment on Microstructure and Drawing Properties of AZ31 Magnesium Alloy Rolling Sheet

作　　者：程永奇[1] 陈振华[1] 夏伟军[1] 傅定发[1] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082

出　　处：《有色金属》2006年第1期5-9,共5页Nonferrous Metals

基　　金：湖南省科技重大专项计划资助项目(04GK10081);湖南省科技厅重点资助项目(03JKY1016)

摘　　要：研究不同退火工艺下AZ31镁合金轧制板材显微组织以及冲压性能。结果表明,单向轧制板材,经退火处理后,由于发生了再结晶,孪晶消失,板材晶粒形状由退火前的板条状演变为退火后的等轴状,随退火温度升高和退火时间延长,部分晶粒发生了长大,但仍有部分细晶存在。退火处理后,板材屈强比降低,n值和R值升高,表明退火处理可有效改善板材的冲压性能。经200℃、1h退火处理的板材,冲压性能改善最为明显。The microstructure and drawing properties of the AZ31 magnesium alloy sheet with annealing heat treatment under various conditions are investigated. The results show that the grains in the single direction roll lng sheet is changed from strip to equal axis shape because of the recrystallization and twin crystals disappearance during annealing heat treatment, and there are some fine grains although part grains are grown. The drawing property of the sheet is improved by annealing heat treatment, it is indicated by the decrease of yield/tensile strength ratio and increase of the values of n and R parameters after annealing heat treatment, and the most remarkable improvement is for the sample annealing heat treated under 200℃ × 1h.

关 键 词：金属材料 AZ31镁合金 退火处理 轧制板材 显微组织 冲压性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG115.52[金属学及工艺—金属材料]