Rail
AssigneeJfe Steel Corporation
InventorsMinoru Honjo, Mineyasu Takemasa
Life of this patent
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Abstract
Provided is a rail that is effective in improving wear resistance and rolling contact fatigue (RCF) resistance. The rail has a metallic structure including a pearlitic structure and a structure other than the pearlitic structure in a surface layer from a surface of a rail head to a depth of at least 0.5 mm, where the pearlitic structure has Vickers hardness of 420 HV or more and 520 HV or less, and the structure other than the pearlitic structure has Vickers hardness of 350 HV or more and 420 HV or less.
Claims3
A rail comprising a metallic structure including a pearlitic structure and a structure other than the pearlitic structure in a surface layer from a surface of a rail head to a depth of at least 0.5 mm and 3 mm or less, wherein
- the pearlitic structure has Vickers hardness of 420 HV or more and 520 HV or less,
- the structure other than the pearlitic structure has Vickers hardness of 350 HV or more and 420 HV or less, and
- an area fraction of the structure other than the pearlitic structure in the surface layer is more than 3% and 12.1% or less.
Dependencies are inferred from the claim text.