热轧板带线粗轧机接轴扁头套损坏事故分析

Analysis on Damage Causes of Flat Head Sleeve of Main Drive Shaft in Hot Rolling Strip Roughing Mill

针对热轧生产线粗轧机主传动接轴扁头套损坏，通过工艺、计算机辅助、断口等方面分析，得出结论板坯加热温度较低、轧机压下量大，是导致接轴扁头套断裂的主要原因。同时提出了相应的改善建议，为类似产线吸取事故教训、提高接轴维护水平提供了借鉴。

Aiming at the damage of the flat head sleeve of the main drive shaft of the 2150 hot rolling rnughing mill, the conclusion is drawn through the analysis of technology, computer aided and fractography. The main reason fnr the fracture of the axle sleeve is the low heating temperature of the slab and the large reduction of the rolling mill. At the same time, the corresponding improvement snggestions are put forward, which provides reference for similar production lines to learn lessons from accidents and raise the maintenance level of shaft.