Abstract：With the improvement of steel purity, the occurrence probability of large-size brittle non-metallic inclusions in steel gradually decreases. It is difficult to be detected by the conventional inclusion detection methods, but these large-size brittle inclusions have an important impact on the fatigue life of steel. An analysis method for the maximum size of inclusions in steel, i.e., extreme value analysis method, was introduced. The maximum size of brittle inclusions in wheel steel was estimated by the method. Moreover, the elemental composition of large-size brittle inclusions was analyzed by energy spectrometer. The results showed that the extreme value analysis method based on Gumbel distribution function could be used to estimate the maximum inclusion size in wheel steel. When the method was used in the actual production and testing, the selection of cumulative distribution probability F(x) should be paid attention to, that was, the total sample quantity had a great impact on the evaluation results. The chemical composition of large-size Class B inclusions in wheel steel was generally CaO + Al2O3.
王艳阳，喻能利，后宗保，夏冰，王怀伟，程亚南. 应用极值分析法推测车轮钢中最大夹杂物尺寸[J]. 物理测试, 2022, 40(4): 42-48.
WANG Yanyang,YU Nengli,HOU Zongbao,XIA Bing,WANG Huaiwei,CHENG Yanan. Application of extreme value analysis method to speculate the maximum inclusion size in wheel steel. PHYSICS EXAMINATION AND TESTING, 2022, 40(4): 42-48.
2022, Vol. 40 
