ALUMINUM-FREE BEARING STEEL

Citation
D. Thiery et al., ALUMINUM-FREE BEARING STEEL, Stahl und Eisen, 117(8), 1997, pp. 79
Citations number
30
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
ISSN journal
03404803
Volume
117
Issue
8
Year of publication
1997
Database
ISI
SICI code
0340-4803(1997)117:8<79:ABS>2.0.ZU;2-B
Abstract
Objective. The steadily rising demands placed on the life of roller be arings have led, in equal degree, to an improvement of the appropriate steels. An essential factor in this respect is the cleanness, which c an be influenced by various metallurgical measures. In many instances, the main aim is the reduction of the steel's oxygen content. Saarstah l AG, on the other hand, has chosen a different approach, namely the p roduction of a steel with a very high degree of cleanness by way of Al -free remelting. Summary. At Saarstahl AG a bearing steel with very go od microscopic and macroscopic cleanness has been produced without usi ng aluminium. The relationships between steel cleanness and bearing li fe are described in an extensive evaluation Of Literature sources. The metallurgical aspects of the practice are discussed and basic theory explained. In the course of the production of some 75 000 t of bearing steel using this practice, it was possible to attain very good macros copic cleannes as excellent well as micro-cleanness conforming to spec ification. Furthermore, it was found that the characteristics, such as the processing properties and the life of the roller bearings. are at least as good or better in comparison with aluminium-deoxidised steel s.