为提高武钢板坯连铸机扇形段轴承使用寿命,减少因轴承破损导致的异物压入缺陷,系统分析了扇形段轴承失效的原因,对扇形段设计和工艺参数的选择等方面进行了研究。结果表明扇形段轴承失效的主要原因是异常过载,提出了调整轻压下参数、优化尾坯输出模式、启动软夹紧功能等改进措施。连铸机扇形段工艺优化后,轴承破损引起的扇形段失效比例由89.7%降低到62.5%,扇形段平均使用周期由122天提高至140天,因异物压入导致的热轧卷板缺陷基本消除。 In order to improve the service life of fan-shaped bearing of slab caster in Wugang and to reduce the foreign material intrusion defects caused by bearing damage, the causes of failure of fan-shaped bearing were systematically analyzed, and the design of the sector and the selection of process parameters were studied. The results show that the main reason for failure of sector bearing is abnormal overload, and some improvement measures such as adjusting the parameters under light pressure, optimizing output mode of tailstock and starting soft clamping function are put forward. After optimization of the sector shape of the continuous caster, the percentage of failure of the sector due to bearing damage was reduced from 89.7% to 62.5%. The average service life of the segment was increased from 122 days to 140 days. The hot rolled coil defects eliminate.