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METHOD FOR MANUFACTURING RAIL, AND RAIL
Proposed are the welding conditions under which welds are always stably formed such that the difference in hardness between flash-butt welds and rail base metal and the deflection in a bending test are in better ranges. A plurality of pieces of rail base metal are joined via welds formed by flash-butt welding, where the rail base metal has a chemical composition containing C: 0.60 to 1.20 mass%, Si: 0.10 to 1.50 mass%, Mn: 0.10 to 1.50 mass%, and Cr: 0.10 to 1.50 mass%, with the balance being Fe and inevitable impurities, and the flash-butt welding is performed with an amount of welding heat input of 1.50 × 105kA2 × sec or more and 4.50 × 105kA2 × sec or less.
METHOD FOR MANUFACTURING RAIL, AND RAIL
Proposed are the welding conditions under which welds are always stably formed such that the difference in hardness between flash-butt welds and rail base metal and the deflection in a bending test are in better ranges. A plurality of pieces of rail base metal are joined via welds formed by flash-butt welding, where the rail base metal has a chemical composition containing C: 0.60 to 1.20 mass%, Si: 0.10 to 1.50 mass%, Mn: 0.10 to 1.50 mass%, and Cr: 0.10 to 1.50 mass%, with the balance being Fe and inevitable impurities, and the flash-butt welding is performed with an amount of welding heat input of 1.50 × 105kA2 × sec or more and 4.50 × 105kA2 × sec or less.
METHOD FOR MANUFACTURING RAIL, AND RAIL
VERFAHREN ZUR HERSTELLUNG VON SCHIENEN UND SCHIENE
PROCÉDÉ DE FABRICATION DE RAIL ET RAIL
IIZUKA NAOKI (Autor:in) / MATSUOKA RYO (Autor:in) / HONJO MINORU (Autor:in) / OKAMOTO SHIGEO (Autor:in)
27.04.2022
Patent
Elektronische Ressource
Englisch
METHOD FOR MANUFACTURING A RAIL AND CORRESPONDING RAIL
Europäisches Patentamt | 2021
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