一事故发生经过1986年10月18日零点30分,初轧乙班用28t 重的钢锭轧制250×1350板坯时,在1~#初轧机处当轧到第3根钢锭第11道次时发生下轧辊断裂。当时操作工在轧件咬入2/3长度时(见图1)听到一声沉闷的响声,以为是钳吊往运锭车辊道上放倒钢锭。当时只发现轧件有打滑现象,没有引起注意。此 An accident occurred at 0:30 on October 18, 1986, the beginning of the B-class with 28t heavy steel ingot rolling 250 × 1350 slab, at the first ~ # mill when the first ingot rolling to the first eleventh Occurs when the roll break. At that time the operator bite into the 2/3 length of the rolling (see Figure 1) heard a dull sound, that is the clamp hanging to transport ingot roller down on the ingot. At that time, only the rolling phenomenon was found, there was no attention. this