Development of cutting technology based on evaluation of cutting behavior with ultra-fine grained materials for fabrication of micro component parts

等径角挤压是获得超细晶材料的一种剧烈塑性变形工艺。采用正交切削法研究了经ECAP变形的材料的切削行为。在切割剪切角与ECAP引入的剪切变形区角一致的条件下，切割阻力减小。在其他切削条件下，在其他切削方向和切削表面上，确定了一般的切削行为。随着各向异性影响的减小，经ECAP变形的材料对切削的各向异性影响无法得到证实。为了研究切削阻力减小的原因，还进行了有限元分析。但原因无法澄清。但经ECAP变形后的材料加工微零件，可以判断在切削加工过程中没有太大的问题。

ECAP (Equal Channel Angular Pressing) is one of the severe plastic deformation processes for obtaining ultra-fine grained materials. This study investigated the cutting behaviors by the orthogonal cutting for the materials deformed by ECAP.On the conformable conditions between the shear angle on cutting and the angle of shear deformation zone introduced by ECAP, the cutting resistance was decreased. In the other cutting conditions on other the cutting directions and cutting surfaces, a general cutting behavior was confirmed. The anisotropy on cutting was not able to be confirmed for the materials deformed by ECAP with the decreasing an influence of anisotropic. To examine the reason why the cutting resistance decreases, FEM analysis was also carried out. But the reason was not able to be clarified. However, it was able to be judged that there was no big problem in cutting process when the micro parts are made from the material deformed by ECAP.