Rail excellent in resistance to rolling fatigue damage

E - Fixed Constructions – 01 – B

Patent

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Details

E01B 5/02 (2006.01) C22C 38/00 (2006.01) C22C 38/22 (2006.01) C22C 38/28 (2006.01) C22C 38/42 (2006.01)

Patent

CA 2148870

A high-abrasion bainite rail excellent in a resistance to rolling fatigue and failure essentially consisting of 0.15 to 0.55 wt% of C, 0.05 to 1.0 wt% of Si, 0.1 to 2.5 wt% of Mn, 0.03 wt% or less of P, 0.03 wt% or less of S, 0.1 to 3.0 wt% of Cr, 0.005 to 2.05 wt% of Mo, and the balance of iron and inevitable impurities. The head portion of the rail has a uniform bainite structure, and a hardness at any position of the head top portion and the head corner portion of the rail falls within the range of 240 to 400 in Vickers hardness Hv.

Divulgation d'un rail en bainite, à usure élevée, ayant une excellente résistance à la fatigue et à la défaillance au roulis, constitué principalement de 0,15 à 0,55 % en poids de C, de 0,05 à 1,0 % en poids de Si, de 0,1 à 2,5 % en poids de Mn, d'au plus de 0,03 % en poids de P, d'au plus de 0,03 % en poids de S, de 0,1 à 3,0 % en poids de Cr, de 0,005 à 2,05 % en poids de Mo, de fer et de quelques impuretés inévitables pour le reste. L'extrémité du rail a une structure uniforme en bainite, et la dureté en tout point de la partie supérieure et des angles de l'extrémité du rail se situe dans la gamme allant de 240 à 400, en unités de dureté Vickers, Hv.

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