Pearlitic rail with excellent wear resistance and toughness

Details Pearlitic rail with excellent wear resistance and toughness Pearlitic rail with excellent wear resistance and toughness

C - Chemistry, Metallurgy

22

C

C22C 38/04 (2006.01) C22C 38/02 (2006.01) C21D 9/04 (2006.01)

Patent

CA 2752318

This pearlitic rail consists of a steel including: in terms of percent by mass, C: 0.65% to 1.20%; Si: 0.05% to 2.00%; Mn: 0.05% to 2.00%; and REM: 0.0005% to 0.0500%, with the balance being Fe and inevitable impurities, wherein, in a head portion of the rail, a head surface portion which ranges from surfaces of head corner portions and a head top portion to a depth of 10 mm has a pearlite structure, and the hardness Hv of the head surface portion is in a range of 320 to 500.

L'invention concerne un rail perlitique constitué d'un acier contenant, en masse, C : 0,65 à 1,20 %, Si : 0,05 à 2,00 %, Mn : 0,05 à 2,00 %, et REM : 0,0005 à 0,0500 %, le reste étant du Fe et d'inévitables impuretés, la partie de surface de la tête, qui se situe jusqu'à une profondeur de 10 mm de la surface dans la partie de coin de la tête et dans la partie supérieure de la tête du rail, ayant une structure perlite et présentant une dureté (Hv) de 320 à 500.

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