| 摘要 |
A seamless flux cored wire and a manufacturing method thereof are provided to prevent a crack from occurring in a welding section by irradiating a laser beam onto a seam part of the welding section. A method of manufacturing a seamless flux cored wire(110) comprises the steps of preparing a metal thin film(1), bending the metal thin film, filling a flux(4) in the metal thin film, processing the metal thin film having the flux such that the metal thin film has a rounded section, and irradiating a laser beam onto a seam part of the metal thin film. When irradiating the laser beam onto the seam part of the metal thin film, an angle between the irradiation direction of the laser beam and the proceeding direction of the metal thin film is a right angle or an obtuse angle.
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