Estimation of Maximum Inclusion by Statistics of Extreme Values Method in Bearing Steel
A statistic method,statistics of extreme values (SEV),which can estimate the size of maximum inclusion in steel,was described in detail.The characteristic size of the maximum inclusion in a high clean carbon chromium bearing steel (GCr15) was evaluated by this method,and the morphology and composition of large inclusions founded were analyzed by SEM.When standard inspection area,S0,is 280mm2,the characteristic size of the biggest inclusion founded in 30 standard inspection area is 23.932μm,and it has a 99.9% probability of the characteristic size of maximum inclusion in the steel been inspected being no larger than 36.856μm.The compounding in large inclusions widely exist and the traditional evaluation method has limitations in high clean carbon chromium bearing steel.
GCr15 nonmetallic inclusions statistics of extreme values Gumbel distribution function likelihood function estimation
TIAN Chao LIU Jianhui LU Hengchang DONG Han
East China of Central Iron & Steel Research Institute, Beijing 100081, China
国际会议
成都
英文
689-693
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）