Speaker
Mr
Noritaka Nishiguchi
(JFE Steel corporation)
Description
An innovative development was carried out to improve fatigue life of bearing steel at West Japan Works Kurashiki, JFE Steel Corporation.
First, in order to prevent contamination at the continuous casting, sand filled in the nozzle of ladles is discharged just before starting continuous casting.
Secondly, the main composition of tundish flux was modified for better melting performance, such as sealing and inclusion absorbing capacity.
With the inventive techniques described above, the fatigue life of bearing steel improved by 3.9 times as many as that of conventional bearing grade.
Author
Mr
Noritaka Nishiguchi
(JFE Steel corporation)
Co-authors
Mr
Takashi Yamauchi
(JFE steel corporation)
Mr
Yusuke Watanabe
(JFE Steel corporation)