The research center of the Brazilian National Steel Co. has been conducting studies on Nb-bearing Si--Mn rail steel as an alternative way to improve railway service performance. Strengthening mechanisms through microalloying additions of Nb in Si--Mn rail steel are reviewed and metallographic, mechanical and weldability characteristics are presented. The results from laboratory tests (fracture mechanics, wear resistance and rolling contact fatigue) and from in-service tests carried out on two Brazilian heavy haul railways are analyzed. (AU)
Technical Paper (PDF 454.88 KB)
Desing System
Mobility
Technical Paper
Niobium in Si-Mn rail steel
International Symposium Niobium'81
1981
Nolasco, C A
Oliveira, E Q
Leonardos, G
Bordignon, P J P
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