不均匀变形是指轧件各处的相对压下量、流动速度及应力彼此各不相同。在实际生产中,用平辊轧制矩形件时,尽管沿轧件宽度上相对压下量是相同的,但在轧件内部各点之压下量还是不同的。所以,任何压力加工过程产生不均匀变形是不可避免的。引起不均匀变形的原因有:①轧制时,由于轧件内化学成份和组 Uneven deformation refers to the relative reduction of rolling throughout the flow velocity and stress vary from each other. In actual production, the use of flat roller rolling rectangular pieces, although the rolling along the width of the relative reduction is the same, but the rolling point of the internal pressure reduction is still different. Therefore, any pressure processing uneven deformation is inevitable. Cause of uneven deformation caused by: ① rolling, due to the chemical composition and rolling within the group