| 摘要 |
PURPOSE:To shield the periphery in a heated part and to prevent the oxidation of the alloy components in materials to be welded in the stage of flash butt welding of plate material by sticking a material which generates gas except oxygen near the butt part of the materials to be welded. CONSTITUTION:A pair of plate-shaped materials W, W' to be welded are clamped by electrodes 1, 2. A material 3 which generates gas except oxygen by the effect of heat during welding is stuck on the top and bottom surfaces near the butt patt of the materials W, W'. The material 3 is selected from (a) a carbon polymer, org. compd. or org. silicon compd. (b) zinc or zinc powder-contg. material, and (c) and alloy or intermetallic compd. contg. calcium or magnesium or material contg. the same. If the materials are subjected to flash butt welding in this state, the material 3 is easily evaporated 4 to vapor and the periphery of the heated part is shielded from the atm. by the vapor pressure thereof. The weld zone is therefore kept free from oxide remaining therein. |
