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以AZ31镁合金为研究对象,对双向挤压与螺旋复合变形模型进行工艺参数的数值模拟运算,分析工艺条件对AZ31镁合金在成型过程中等效应变和挤压力的影响。结果表明:双向挤压与螺旋复合变形可显著提高坯料变形过程的等效应变,随着挤压比的增加、挤压温度和挤压速度的升高,坯料所获得的等效应变值显著升高,双向挤压与螺旋复合变形AZ31镁合金的等效应变值可高达3.2。工艺条件的有限元分析为镁合金在双向挤压与螺旋复合变形的实际生产应用提供了重要参考价值。
Taking AZ31 magnesium alloy as the research object, the numerical simulation of the process parameters of bidirectional extrusion and helical composite deformation model was carried out. The effect of technological conditions on the equivalent strain and extrusion force of AZ31 magnesium alloy during forming process was analyzed. The results show that the biaxial compression and helical composite deformation can significantly increase the equivalent strain of the billet during deformation. With the increase of the extrusion ratio, the extrusion temperature and the extrusion speed increase, the equivalent strain obtained by the billet significantly increases High, two-way extrusion and spiral composite deformation AZ31 magnesium alloy equivalent strain value can be as high as 3.2. Finite element analysis of the process conditions provides an important reference value for the practical production and application of magnesium alloy in two-way extrusion and helical composite deformation.