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摘要：
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本文采用等温挤压工艺,成形温度为350～360℃;根据等温压缩实验所得变形镁合金应力-应变数据,应用刚塑性有限元法模拟变形镁合金等温挤压成形,探讨变形镁合金等温挤压成形过程中,变形力及金属流动规律;根据模拟得到的应力场、应变场、速度场及加载变化等,预测变形时产生的缺陷。在试验生产中针对模拟结果,采用快换式模具结构和局部引流法等,成功地挤压出形状复杂的镁合金零件,其力学性能,组织和尺寸精度均符合要求。从而为该类零件等温挤压成形工艺大规模生产提供科学依据。
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Isothermal-extrusion process was used with the forming temperature of 350~360℃.According to the stress-strain data gaining from isothermal compression experiment,and using rigid-plastic finite element method,the magnesium alloy isothermal-extrusion forming was simulated. It emphatically discussed the deformation force and metal flowing law in the course of isothermal-extrusion deformation.According to the simulation result about stress field,strain field,velocity field and changed load and etc.,the deformed defects were predicted,which offered the reliable reference basis for isothermal extrusion deformation of this kind of working.The structure of quickly mould changing and local diversion method,etc.were used to extrude the magnesium alloy workpiece whose mechanics performance and the structure accuracy requirements were met.
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基金项目：
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作者简介：
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参考文献：
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