Welded rail

This welded rail according to one aspect of the present invention is provided with: a plurality of rail parts that each have a head section and a pillar section and each have a height h; and a welding joint part that joins the rail parts. The rail parts each have a predetermined chemical composition...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAZAKI, Teruhisa, SAITA, Kenji, UEDA, Masaharu, TANAHASHI, Takuya
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS FIXED CONSTRUCTIONS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS MACHINES FOR MAKING RAILWAYS OF ALL KINDS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PERMANENT WAY PERMANENT-WAY TOOLS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	This welded rail according to one aspect of the present invention is provided with: a plurality of rail parts that each have a head section and a pillar section and each have a height h; and a welding joint part that joins the rail parts. The rail parts each have a predetermined chemical composition. The HAZ width of the welding joint part is not more than 60 mm. Regarding the welding joint part, in a region located from 0 to (2/3)×h from a head top part outline surface and within ±5 mm in a longitudinal direction from the welding center in a cross section passing through the center of the welding joint part and in parallel with a longitudinal direction and a vertical direction of the welded rail, the area percentage of martensite structures is 0.0006-0.1000%. In said region, the number of martensite structures having a particle size of 20-200 μm is 3-80.