Bainitic steel grade for solid wheels: metallurgical, mechanical, and in-service testing

Bainitic steel grades generally have superior rolling contact and thermal fatigue resistances, but poorer wear characteristics when compared with ‘conventional’ pearlitic steel wheels. To improve the wear characteristics, the manufacturing process of bainitic materials needs to be carefully controlled. In this article, the manufacturing process of the ‘MICRALOS’ bainitic steel grade has been described. The main focus is on metallurgical testing activities performed in order to compare the new steel grade with standard pearlitic steels and to predict the service behaviour of the solid bainitic wheels. Further, on-going ﬁeld tests on the iron ore line between Luleå and Narvik have been reported, with details about measurement methods and results. The performance of the wheels is reviewed and compared with the current scientiﬁc knowledge of bainitic steel grades and the deterioration of heavy haul wheels. Finally, beneﬁts of and challenges for bainitic wheels in general and for the MICRALOS grade wheels in particular will be discussed.

Ghidini, Andrea (författare)
Karlsson, TordLuossavaara-Kiirunavaara AB (LKAB) (författare)
Ekberg, Anders,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)anek (författare)
Luossavaara-Kiirunavaara AB (LKAB)Chalmers tekniska högskola (creator_code:org_t)

Ingår i:Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit223:2, s. 163-1710954-40972041-3017

Av författaren/redakt...: Gianni, Andrea; Ghidini, Andrea; Karlsson, Tord; Ekberg, Anders, ...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Teknisk mekanik

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Farkostteknik

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.