The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2002
Filed:
Mar. 23, 2001
Voest-Alpine Schienen GmbH, Donawitz, AT;
Abstract
A railroad rail of a steel alloy having a pearlitic microstructure, which rail has a good long-term serviceability, high ductility and high abrasion resistance of the working surface at the rail head, the rail being formed of a steel alloy having a chemical composition in weight % of 0.4 to 1.0 carbon, 0.1 to 1.2 silicon, 0.5 to 3.5 manganese, up to 1.5 chromium, optionally other alloy elements below 1 weight %, the rest being iron and impurities, and at least the rail head having a portion of fine pearlitic microstructure and a hardness between 340 HB and 425 HB down to a sufficient depth from the top surface, the arrangement and the extension of the portion of fine pearlitic microstructure in the rail cross section being even along the entire length of the rail.