车身用铝、镁合金先进挤压成形技术及应用  

Advanced Extrusion Technology and Application of Aluminium,Magnesium Alloy for Vehicle Body

作　　者：李落星[1] 周佳[1,2] 张辉[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]湖南大学材料科学与工程学院,长沙410082

出　　处：《机械工程学报》2012年第18期35-43,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51075132);高等学校博士学科点专项科研基金(20090161110027);湖南省杰出青年基金(09JJ1007)资助项目

摘　　要：资源和环境的制约将成为未来社会实现可持续发展的瓶颈,对决定国民经济命脉的交通运输产业的发展有显著影响。因此,低油耗、低排放技术已成为汽车产业发展中的关键技术,轻量化是节约能源和减少有害气体排放的有效途径。铝、镁合金由于比强度和比刚度高,是汽车轻量化的理想材料。针对汽车车身用的高性能铝、镁合金挤压成形和后续加工困难的问题,系统地开展挤压变形机理和精确仿真建模研究,开发包括基于数值仿真的等温挤压、挤压—弯曲—淬火一体化成形和镁合金连续挤压等一系列高效、短流程挤压加工新工艺、新装备。为铝、镁合金在汽车上的大规模推广应用打下了良好的基础。Resource and environment problems will be the bottleneck of sustainable development in the future,which is significant influence for the transport industry.Therefore,the low fuel consumption,low emission technologies are key technologies in the automotive industry.Lightweight is an effective way to save energy and reduce emission.Aluminum and magnesium alloys are ideal materials for lightweight vehicles due to their high specific strength and high specific stiffness.Considering of the difficulty of extrusion forming and its＇ subsequent processing for high-performance aluminum and magnesium alloys,a systematic research has been carried out on extrusion mechanism and precise modeling.A series of high efficiency,short processing extrusion technologies have been developed,including isothermal extrusion based on numerical simulation,extrusion-bending-quenching integration forming and continuous extrusion forming.The new developed extrusion technologies lay a good foundation for the large scale application of aluminum and magnesium alloys in the automobile industry.

关 键 词：铝合金 镁合金 等温挤压 挤压—弯曲—淬火一体化 连续挤压 

分 类 号：TG146[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]