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US 2011/0226389 A1Published application
Pearlite rail
AssigneeNippon Steel Corporation
InventorsMasaharu Ueda, Kyohei Sonoyama, Takuya Tanahashi, Teruhisa Miyazaki, Katsuya Iwano
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Abstract
A pearlite rail contains, by mass %, 0.65 to 1.20% of C; 0.05 to 2.00% of Si; 0.05 to 2.00% of Mn; and the balance composed of Fe and inevitable impurities, wherein at least part of the head portion and at least part of the bottom portion has a pearlite structure, and the surface hardness of a portion of the pearlite structure is in a range of Hv320 to Hv500 and a maximum surface roughness of a portion of the pearlite structure is less than or equal to 180 μm.
Claims15
A pearlite rail comprising:
- by mass %,
- 0.65 to 1.20% of C;
- 0.05 to 2.00% of Si;
- 0.05 to 2.00% of Mn;
- and
- the balance composed of Fe and inevitable impurities,
- wherein at least part of a head portion and at least part of a bottom portion have a pearlite structure, and
- a surface hardness of a portion of the pearlite structure is in a range of Hv320 to Hv500 and a maximum surface roughness of a portion of the pearlite structure is less than or equal to 180 μm.
5 more elements
Dependencies are inferred from the claim text.