METHOD FOR PRODUCING RAIL

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United States of America Patent

APP PUB NO 20220267870A1
SERIAL NO

17593298

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ATTORNEY / AGENT: (SPONSORED)

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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)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 1000011 ?1000011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
HONJO, Minoru Chiyoda-ku, Tokyo, JP 25 45
TAKEMASA, Mineyasu Chiyoda-ku, Tokyo, JP 5 4

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