Profiled rolling stock and method for manufacturing the same

Details Profiled rolling stock and method for manufacturing the same Profiled rolling stock and method for manufacturing the same

C - Chemistry, Metallurgy

21

D

C21D 9/04 (2006.01) B21B 1/08 (2006.01) C21D 1/20 (2006.01) E01B 5/02 (2006.01)

Patent

CA 2225240

A profiled rolling stock, in particular a running rail or railroad track made of an iron-based alloy, is provided. The alloy contains silicon plus aluminum below 0.99 wt% of the rolling stock. A structure in the cross section is formed, at least partially, by isothermic structural transformation due to accelerated cooling from the austenite region of the alloy to a lower intermediary phase temperature and holding. Transformation preferably occurs between the martensite transformation point of the alloy a temperature 250°C over the martensite transformation point Ms.

L'invention concerne un matériel roulant profilé, notamment un rail de roulement ou une voie de chemin de fer composée d'un alliage à base de fer. L'alliage contient de la silicone et de l'aluminum au-dessous de 0,99 % d'équivalent en poids du matériel roulant. Une structure dans la coupe transversale est formée, du moins en partie, par transformation structurale isothermique due à un refroidissement accéléré de la région austénitique de l'alliage à une température et à une retenue à phase intermédiaire inférieure. La transformation survient, de préférence, entre le point de transformation martensitique de l'alliage, à une température de 250 degrés celcius au-dessus du point de transformation martensitique Ms.

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