不同变形路径中的板厚不均匀性

Inhomogeneity of Thickness of Sheet in Different Forming Path

摘要: 采用低碳钢板K08Al、08Al研究了单向拉伸、平面应变、等双向拉伸、单向拉伸——等双向拉伸及等双向拉伸——单向拉伸5种变形路径中的表面粗糙度R_z、R_m值随变形量的变化。同时,对初始板厚不均匀度f_o以及在不同变形路径中板厚不均匀度随变形的发展进行了测定和分析。结果表明:在各变形路径中,随着变形量的增加,表面粗糙度R_z、R_m值呈线性增加,而板厚不均匀度f_R值则显著下降。

Abstract: By making use of low-carbon steel K08Al, 08Al, the change of surface roughness Rz,Rm value according to the forming paths of uniaxial, plane, biaxial, uniaxial-biaxial and biaxial-uniaxial deformation models was investigated. The initial value f_o and the change of inhomogeneity of thickness f_R with strain were measured. The results show that the surface roughness Rz, Rm increase linearly with the increase of strain while inhomogeneity of thickness f_R decrease in each forming path.