大塑性变形下变形速率对AZ31合金成形性能的影响  

Effect of Deformation Rate on Formability of AZ31 Alloy Under Large Plastic Deformation

作　　者：刘明朴[1] 彭晓东[1,2] 刘军威[1] 谢卫东[1,2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆大学国家镁合金材料工程技术研究中心,重庆400045

出　　处：《热加工工艺》2010年第21期115-117,共3页Hot Working Technology

摘　　要：采用等温挤压成形工艺研究了大塑性变形下变形镁合金AZ31的成形性能,分析了成形过程中变形速率对成形性、成形力和应变的影响。结果表明,AZ31合金在300～350℃等温挤压成形,随变形速率的升高,挤压变形力呈下降的趋势;变形速率为1 mm/s时,应变分布均匀,能够获得最佳的成形质量和力学性能。The formability of AZ31 wrought magnesium alloy under large plastic deformation were investigated by isothermal extrusion process.The effects of deformation rate on formabality,forming force and strain under large plastic deformation were analyzed.The results show that,when AZ31 alloy is isothermal-extruded at 300～350 ℃,the formation force decreases with the increase of deformation rate.The alloy presents uniform strain distribution,best forming quality and mechanical properties at the deformation rate of 1 mm/s.

关 键 词：AZ31变形镁合金 大塑性变形 等温挤压 变形速率 

分 类 号：TG376[金属学及工艺—金属压力加工]