摘要
基于DEFORM-3D平台,以军用战地发射塔天线用AZ31镁合金薄壁管分流挤压工艺过程为研究对象,研究建立了精确、高效的AZ31镁合金薄壁管分流挤压有限元模型。模拟研究揭示了挤压速度对挤压力、焊合压力及模口坯料金属峰值温度的影响规律。基于所得规律,综合考虑挤压力、焊合质量及挤出管材表面质量要求,获得了该规格AZ31镁合金薄壁管在2000t挤压机上的合理挤压速度范围为3.5~7mm/s。
A precise and efficient 3D-FE model of the porthole extrusion process for AZ31 Mg alloy thin-walled tube, used to manufacture towers antenna in battlefield, was developed in the DEFORM-3D software environment. And the influencing laws of ram speed on the load, welding pressure and the peak temperature of billet at die export were investigated and revealed by comprehensive numerical simulations. With integrated consideration of the extrusion load, quality of welding area and surface quality of the extruded tube, it is proposed that the optimum ram speed range is about 3.5~7 mm/s for the extrusion of AZ31 Mg alloy thin-walled tube on a 2000 t extrusion machine.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第12期2178-2184,共7页
Rare Metal Materials and Engineering
基金
"高档数控机床与基础制造装备"国家科技重大专项(2009ZX04005-031-11)
