Rail excellent in toughness and wear resistance and method...

Details Rail excellent in toughness and wear resistance and method... Rail excellent in toughness and wear resistance and method...

E - Fixed Constructions

01

B

E01B 5/02 (2006.01)

Patent

CA 2152877

There is provided a rail of high toughness and high wear resistance, consisting essentially of 0.2 to 0.5 wt% of C, 0.1 to 2.0 wt% of Si, 1.0 to 3.0 wt% of Mn, 0.035 wt% or less of P, 0.035 wt% or less of S, 0.3 to 4.0 wt% of Cr, and the balance of iron and inevitable impurities. The rail has a metal structure of a bainite structure, a hardness of 400 Hv or more at each of a head top portion and a head corner portion thereof, a tensile strength of 1200 MPa or more, and a 2 mm, U-notch Charpy absorbed energy of 30 J or more at +20°C.

Divulgation d'un rail de haute dureté et de haute résistance à l'usure, constitué principalement de 0,2 à 0,5 % en poids de C, de 0,1 à 2,0 % en poids de Si, de 1,0 à 3,0 % en poids de Mn, d'au plus de 0,035 % en poids de P, d'au plus de 0,035 % en poids de S, de 0,3 à 4,0 % en poids de Cr, de fer et de quelques impuretés inévitables pour le reste. Le rail a une structure métallique en bainite, une dureté d'au moins 400 Hv à la partie supérieure et aux angles de chaque extrémité, une résistance à la traction d'au moins 1 200 MPa et une valeur de résilience Charpy, U de 2 mm, d'énergie absorbée d'au moins 30 J, à +20.degré. C.

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