| 摘要 |
PURPOSE:To widen a width of a welding condition for executing an appropriate welding, and to obtain a weld zone of a high quality by giving a stretch of a specified quantity of a weld line direction, to a butt part, when welding a butt part which is butted each dead thin plate material being a base metal. CONSTITUTION:Dead thin plate materials 10, 10 being base metals are butted, and thereafter, a stretch as indicated with an arrow is given to their butt part 12. Subsequently, welding is executed along the butt part 12 by a prescribed welding means 14 such as an arc welding, etc., under the condition that its stretch quantity (tensile strain) : Q satisfies an expression [alpha : a coefficient of linear expansion (1/ deg.C) of the base metal, T : a temperature ( deg.C) at which a deformation resistance of the base metal scarcely comes to exist by heating executed immediately before welding]. In this way, a deformation caused by a free thermal expansion of the plate material 10 is absorbed effectively by the stretch quantity : Q, a deformation of the butt part 12 caused by the free thermal expansion is softened, and the purpose can be attained. |
