METHOD OF REHEATING RAIL WELD ZONE

[Problem] To obtain a welding joint that has superior fatigue strength that can suppress fatigue cracks in the horizontal direction in the column part and bending fatigue cracks starting from the foot part in rail welding parts. [Solution] In a reheating method for rail weld parts after rail welding...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	TOTTORI, HIDEO, IWANO, KATSUYA, YAMAMOTO, TAKESHI, KARIMINE, KENICHI, UEDA, MASAHARU
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS 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 TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	[Problem] To obtain a welding joint that has superior fatigue strength that can suppress fatigue cracks in the horizontal direction in the column part and bending fatigue cracks starting from the foot part in rail welding parts. [Solution] In a reheating method for rail weld parts after rail welding, the distance (C) between a reheating area (P) for the rail column part (2) and the weld center (Q) is set to 0.2 - 3 times the weld part HAZ length (Lh). The length (B) of the reheating area (P) can be 0.5 - 5 times the weld part HAZ length (Lh). The height (A) of the reheating area (P) can be 0.2 or more times the height of the rail column part (2). The temperature (Th) achieved in reheating at the center of the reheating area (P) can be 400 - 750°C and, furthermore, in relation to the initial temperature (Tw) (°C) of the weld part during reheating, can satisfy 0.375Tw + 350 = Th = 0.5Tw + 600.