Patent Number: 6,254,696

Title: Bainitic type rail excellent in surface fatigue damage resistance and wear resistance

Abstract: High-strength bainitic steel rails have improved resistances to surface fatigue failures and wear required of the head of rails for heavy-load service railroads. The high-strength bainitic steels rails having excellent resistances to surface fatigue failures and wear contain constituents of specific ranges and consisting of bainitic structures at least in part are characterized in that the total area occupied by carbides whose longer axes are 100 to 1000 nm in a given cross section of said bainitic structures accounts for 10 to 50 percent thereof.

Inventors: Ueda; Masaharu (Kitakyushu, JP), Uchino; Kouichi (Kitakyushu, JP), Iwano; Katsuya (Kitakyushu, JP), Kobayashi; Akira (Kitakyushu, JP)

Assignee: Nippon Steel Corporation

International Classification: C22C 38/38 (20060101); C22C 38/34 (20060101); C21D 9/04 (20060101); C22C 038/18 (); C22C 038/22 (); C22C 038/40 ()

Expiration Date: 07/03/2018