Method for producing rail

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12221660
APP PUB NO 20220267870A1
SERIAL NO

17593298

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Provided is a method for producing a rail, with which the sweep in the height direction of a rail before straightening can be suppressed when producing standard rails specified in JIS E 1101. The method includes subjecting a bloom having a chemical composition containing, in mass %, C: 0.60% or more and 0.85% or less, Si: 0.10% or more and 1.00% or less, and Mn: 0.10% or more and 1.30% or less, with the balance being Fe and inevitable impurities, to hot rolling to obtain a rail, subjecting the rail to accelerated cooling under conditions where a cooling start temperature T1 of rail head is 750° C. or higher and 850° C. or lower, a cooling stop temperature T2 of rail head is higher than 700° C., and T1−T2 is 20° C. or more, and then allowing the rail to be naturally cooled.

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Patent Owner(s)

  • JFE STEEL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Honjo, Minoru Tokyo, JP 25 45
Takemasa, Mineyasu Tokyo, JP 5 4

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