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用二维有限元法(FEM)模拟H62黄铜模压形变(GP)过程,根据有限元模型进行模压形变试验,分析试样等效应变的分布规律与模压形变试验后材料的组织和力学性能的关系。研究发现,试样累积的等效应变值随模压周期的增加而增加,等效应变的累积速率接近恒值,而试样表面的累积速率高于试样中心;获得的等效应变比理论应变值低。模压形变使H62黄铜晶粒细化,显微硬度提高;等效应变的分布规律与材料的组织和性能变化相对应。
The two-dimensional finite element method (FEM) was used to simulate the deformation process of H62 brass. The compression deformation test was conducted according to the finite element model. The distribution of equivalent strain and the microstructure and mechanical properties relationship. The results show that the cumulative equivalent strain increases with the increase of the molding cycle, and the cumulative rate of the equivalent strain approaches the constant value, while the cumulative rate of the specimen surface is higher than that of the specimen. The equivalent strain ratio Low value. Mold deformation H62 brass grain refinement, increased microhardness; equivalent strain distribution and material structure and performance changes corresponding.