连铸机矫直段辊子弯曲失效分析及其返修处理

Failure Analysis and Repair of the Bending Rollers of Flattener Part for Caster

HZ102F辊子毛坯未经调质处理,导致辊子堆焊后上线运行过程中发生轴头弯曲,进而导致辊身堆焊层剥落而失效。对其重新进行调质处理,并按照既定堆焊工艺实施返修,辊子完全可以达到使用要求,避免了辊子的批量报废。

The Hz102F rollers,without quenching and tempering before welding,were bending curve at the end when working on the bloom caster,and the welding layer flaked off as a fail.Quenching and tempering was carried out for the bending rollers again,and the welding process was also done according to the fixed technology,then the performance of the rollers met the using need.The rollers becoming waste in batches was avoided.