生态电炉冶炼轴承钢氧化物夹杂物尺寸的极值分析法预测OA

To accurately evaluate the cleanliness and service performance of bearing steel smelted by the eco-friendly electric arc furnace short-process route,the extreme value analysis method was adopted to investigate the oxide non-metallic inclusions in the steel,with comparative verification conducted against the metallographic method and Aspex scanning electron microscopy analysis method.The results show that under different cumulative probability conditions,the size of inclusions in the tested steel predicted by the extreme value analysis method ranged from 16.91 to 23.25 μm;the grade of DS-type inclusions measured by the metallographic method was between 0.5 and 1.0,with an estimated size ranging from 13 to 26 μm;the maximum diameter of inclusions measured by Aspex SEM varied from 8.0 to 23.11 μm.The inclusion grade estimates of the extreme value analysis method were basically consistent with those obtained by the metallographic method and SEM method.This method could be effectively applied to the evaluation of bearing steel cleanliness and the prediction of service performance,thereby providing technical support for the quality control of bearing steel smelted via the eco-friendly electric arc furnace short-process route.