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A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD OF A HEAD HARDENED RAIL
There is provided a manufacturing method and a manufacturing apparatus for a head hardened rail to which various alloy elements are added and which is excellent in hardness and toughness of a head portion surface layer. The method includes, when forcibly cooling at least a head portion of a hot-rolled rail (1) or a heated rail (1), starting the forcible cooling from a state where a surface temperature of the head portion (1a) of the rail (1) is not less than an austenite range temperature, and performing the forcible cooling at a cooling rate of 10°C/sec or more until the surface temperature reaches 500°C or more and 700°C or less after the forcible cooling is started.
MANUFACTURING METHOD OF A HEAD HARDENED RAIL
There is provided a manufacturing method and a manufacturing apparatus for a head hardened rail to which various alloy elements are added and which is excellent in hardness and toughness of a head portion surface layer. The method includes, when forcibly cooling at least a head portion of a hot-rolled rail (1) or a heated rail (1), starting the forcible cooling from a state where a surface temperature of the head portion (1a) of the rail (1) is not less than an austenite range temperature, and performing the forcible cooling at a cooling rate of 10°C/sec or more until the surface temperature reaches 500°C or more and 700°C or less after the forcible cooling is started.
MANUFACTURING METHOD OF A HEAD HARDENED RAIL
HERSTELLMETHODE EINER KOPFGEHÄRTEN SCHIENE
PROCÉDÉ DE FABRICATION D'UN RAIL À CHAMPIGNON TREMPÉ
KIJIMA HIDEO (author) / FUKUDA HIROYUKI (author) / OKUSHIRO KENJI (author)
2019-10-30
Patent
Electronic Resource
English
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