| 摘要 |
PURPOSE:To obtain high welding strength by heating edges of steel plates to be butted until welding is finished, keeping the resulting weld zone at a specified temp. immediately after the welding, and carrying out tempering. CONSTITUTION:When steel plates which are liable to cause weld crack are subjected to butt laser welding, edges of the steel plates to be butted are heated continuously or intermittently along the weld line by 5-50mm width each. The resulting weld zone and its vicinity are kept at 80-400 deg.C immediately after the welding, and tempering is carried out. |
