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通过Gleeble-1500D热模拟机获得了Pb-Mg-Al合金的应力-应变曲线。采用刚粘塑性有限元法对Pb-Mg-Al合金热挤压过程进行了热力耦合数值模拟,分析了热变形参数对挤压力和挤压温度变化情况的影响。模拟结果表明:挤压比控制在25以内、挤压速度及挤压温度分别在:5～15mm/s、200～300℃范围内选取,这会有利于Pb-Mg-Al合金热挤压过程顺利进行。
The stress-strain curve of Pb-Mg-Al alloy was obtained by Gleeble-1500D thermal simulator. The viscoelastic finite element method was used to simulate the hot extrusion process of Pb-Mg-Al alloy. The influence of thermal deformation parameters on the extrusion pressure and extrusion temperature was analyzed. The simulation results show that the extrusion ratio is controlled within 25, the extrusion speed and extrusion temperature are respectively in the range of 5-15 mm / s and 200-300 ° C, which is beneficial to the hot extrusion process of Pb-Mg-Al alloy Smooth progress.