STRESS-RELIEF HEAT TREATMENT APPARATUS

A stress-relief heat treatment apparatus according to the present invention for stress-relief heat-treating a rail which is welded includes an induction heating coil, and the induction heating coil is arranged at a lateral face of a web of the rail while being separated from a welding center of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KARIMINE Kenichi, UEDA Masaharu
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS 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 SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A stress-relief heat treatment apparatus according to the present invention for stress-relief heat-treating a rail which is welded includes an induction heating coil, and the induction heating coil is arranged at a lateral face of a web of the rail while being separated from a welding center of the rail by 20 mm to 300 mm in a longitudinal direction of the rail. The stress-relief heat treatment apparatus may include a plurality of the induction heating coils, and the induction heating coils may be arranged at both sides of the welding center. The stress-relief heat treatment apparatus may include a plurality of the induction heating coils, an axial direction of the induction heating coil may be vertical to a lateral surface of the rail, and a plurality of the induction heating coils, of which distances from the welding center along the longitudinal direction of the rail are the same, may be arranged to cover a whole circumference of the rail while being separated from each other.