摩擦对6061铝合金等径角挤压变形的影响  

Effects of Friction on the Deformation of 6061 Aluminum Alloy during Equal-channel Angular Pressing(ECAP) Process

作　　者：孙前江[1] 王高潮[1] 黄映霞[1] 

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2011年第5期397-399,385,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51075196)

摘　　要：应用Deform-3D软件,对6061铝合金的等径角挤压过程进行了数值模拟,研究了摩擦对挤压过程的影响,并分析了挤压过程中挤压力的变化以及应力和应变的分布情况。等径角挤压试验在1000kN压力机上进行,测定了实际挤压载荷,并采用不同的润滑剂对摩擦的影响进行了研究。结果表明,6061铝合金的等径角挤压变形过程中应力和应变呈不均匀分布,摩擦对挤压过程有着重要的影响。摩擦因数越大,挤压力越大,变形越不均匀。另外,对模拟结果进行了试验验证,结果基本一致。ECAP process of 6061 aluminum alloy was simulated by the Deform-3D software to understand effects of friction on ECAP process and to describe the change of squeezing force and distribution of strain and stress.ECAP process was conducted on 1000kN extruding machine,and effects of different lubricants on friction were observed by measuring practical extruding loading.The results show that strain and stress exhibit uneven distribution during ECAP process,and with increasing in frictional coefficient and extruding forces,uneven degree of deformation is increased.In addition,simulated results are well in agreement with experimental ones.

关 键 词：6061铝合金 等径角挤压 DEFORM-3D 数值模拟 

分 类 号：TG379[金属学及工艺—金属压力加工]