论文部分内容阅读
汽车用冷轧薄钢板是用于冲压成形的,因此其性能的优劣主要取决于冲压成型的性能。衡量材料冲压性能优劣的参数之一是塑性应变比值,良好的冲压性能要求薄板具有高的值,即要求薄板厚度方向的强度大于板面方向的强度,这样可保证薄板在冲压成形时主要由板面内的塑性变形完成,而不易减薄,因而减少冲压成形时的破损率,这种各向异性称为垂直于板面的塑性各向异性。由晶体学可知,体心立方晶金属具有立方体角向强度最大、边向
Cold-rolled automotive sheet steel is used for stamping, so the merits of its performance depends on the performance of stamping. One of the parameters to measure the performance of material stamping is plastic strain ratio. Good stamping performance requires that the sheet has a high value, that is, the strength in the sheet thickness direction is greater than the strength in the sheet direction so as to ensure that the sheet mainly consists of Plane within the plastic deformation is completed, and not easy to thin, thus reducing the rate of damage during stamping, this anisotropy is called plastic perpendicular to the plate surface anisotropy. It is known from crystallography that the body-centered cubic crystal has the largest cube angular strength and the lateral direction