AZ31B管材挤压数值模拟及挤压极限图的建立  

Hot Extrusion Simulation for AZ31B Mg Alloy Tubes and Construction of Extrusion Limit Diagram

作　　者：王新[1] 王迎新[1] 曾小勤[1] 

机构地区：[1]上海交通大学轻合金精密成型国家工程研究中心,上海200030

出　　处：《锻压装备与制造技术》2006年第4期57-61,共5页China Metalforming Equipment & Manufacturing Technology

摘　　要：采用Gleeble3000型热-力学模拟试验机,对不同温度和应变速率下的AZ31B镁合金的变形形为进行了研究,以得到材料的真实应力—应变曲线,导入专业成形数值模拟软件,对尺寸为尴40×3的AZ31B无缝管材,以坯料初始温度240℃～480℃、挤压杆速度2mm/s～80mm/s的条件进行了数值模拟,根据模拟数据建立了挤压极限图,并通过挤压工艺试验对所得的挤压极限图进行了验证,结果吻合的很好。The true flow stress-true strain curves of AZ31 Mg alloy have been achieved by using Gleeble3000 thermo-simulator under various temperatures and strain rates.Then the true flow stress-strain curves are introduced into numerical simulation software.The extrusion of the 40×3 AZ31B seamless tubes has been simulated,where the temperature ranging from 240℃ to 480℃ and the ram speed ranging from 2mm/s to 80mm/s, and the extrusion limit diagram constructed, which has been proved inosculated with the results of the extrusion tests performed.

关 键 词：机械制造 热挤压 镁合金 数值模拟 挤压极限图 

分 类 号：TG379[金属学及工艺—金属压力加工]