| 摘要 |
PURPOSE:To improve the wire feeding performance and enhance the weldability, by maintaining the outer skin hardness within a limited range, in a small diameter flux-cored welding wire. CONSTITUTION:In a small diametr flux-cored welding wire measuring 1.2-1.6mm.phi in diameter, the wire is manufactured through an annealing process in a wire drawing process using roller dies so that the Vickers hardness of the outer skin of the wire may be 160-240Hv. This wire, as compared with the conventional small diameter flux-cored welding wire, excels in the wire feeding performance, so that defects in welding due to poor wire feeding performance may be eliminated. Besides, the arc length is constant and bead width is uniform, and is less spatter, so that excellent weldability may be achieved. |
