摘要
针对镁合金薄壁复杂构件的整体挤压成形难点,利用Deform-3D有限元模拟软件对不同挤压方案成形过程进行数值分析;研究预成形毛坯对成形过程中折叠及充填不满缺陷的影响;基于塑性变形过程中的能量最小原理及阻力最小定律,提出体积分配及材料等距离流动量化补偿法,优化预成形毛坯尺寸及结构。终成形时材料流动速度场分布均匀,成形载荷降低,未出现折叠及充填不满的缺陷,实现了高效、可靠的镁合金异形复杂构件预成形优化设计。成形试验及微观组织、力学性能测试表明,挤压件的尺寸精度、表面质量及力学性能均满足产品服役指标。
In view of the difficulties in the overall extrusion deformation of magnesium alloy thin-walled complex components,Deform-3D finite element simulation software was used to numerical analyze the forming process of different extrusion schemes. The effect of preformed blank on the folding and insufficient filling defects in the forming process was studied. Based on the principle of the minimum energy and the least resistance law in the process of plastic deformation,a compensation method of volume distribution and material flow quantitative equidistance was proposed to optimize the preforming blank dimensions and structure. In the final forming process,the flow velocity field was evenly distributed and the forming load was reduced. The folding and insufficient filling defects do not appear,and the efficient,reliable design of preforming for magnesium alloy complex components is realized. The forming test,microstructure test and mechanical properties test show that the size precision,surface quality and mechanical properties of the extruded parts meet the service indexes.
作者
李旭斌
张治民
李国俊
薛勇
王强
LI Xu-bin;ZHANG Zhi-min;LI Guo-jun;XUE Yong;WANG Qiang(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2019年第5期1-6,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51675492)
山西省自然科学基金资助项目(201801D121106)
关键词
镁合金
复杂构件
预成形
体积分配
量化设计
magnesium alloy
complex components
preforming
volume distribution
quantitative design
