RAIL REPAIRING WELDING METHOD

摘要

PURPOSE:To provide the repair welding method of defects of a rail head for a railroad on which a metal having the hardness and the wear resistance of about the same grade as the rail base material is built up. CONSTITUTION:In the case many kinds of defects on the rail head are removed and the rail head is repaired with build up welding, a filler material for the shielded metal arc welding and a filler material for gas shield arc welding incorporating 0.5-1.5% C against the total weight of filler material are used, the portion from which many kinds of defects of rail head are removed is repaired with build up welding. The generation of high temperature crack in the vicinity of the molten boundary line of the rail base material which can be not avoided with the conventional cladding by welding at the welding part can be perfectly prevented, and the metallic padding excellent in pearlite composition and the wear resistance similar to the base material of rail can be obtained.