应用于超高强钢的滚筒剪刀片失效分析及改进研究

Failure Analysis and Improvement of Roller Shears of Ultra-high Strength Steel

针对宝钢四冷轧连轧机出口滚筒剪进口刀片崩刀情况,从刀片宏观断口形貌、微观断口形貌、金相组织、韧性和硬度等方面对进口刀片原因进行分析,并从组织调整和韧性优化两方面对刀片进行改进研究。通过材质调整和工艺优化,大大提高了刀片使用寿命,具有一定的使用价值。

In view of the situation of the blade breaking at the exit of the roller shear of Baosteel No.4 cold rolling mill,the causes of the blade breaking were analyzed from the aspects of the macro fracture morphology,micro fracture morphology,metallographic structure,toughness and hardness,and the blade was improved from the aspects of the structure adjustment and toughness optimization.Through material adjustment and process optimization,the service life of the blade is greatly improved,which has a certain use value.