FLUX-CONTAINING WIRE FOR ARC WELDING EXCELLENT IN WELDABILITY

PURPOSE:To maintain the stability of welding arc by regulating the contact between a flux wire and a feeder tip to a value in a specific range and also regulating contact electric resistance to a value in a specific range. CONSTITUTION:A wire, finish-wiredrawn to 1.2mmphi by means of roller die drawing or swaging without using a wiredrawing lubricant, is used. the contact pressure between a feeder tip and this wire is regulated to 1-50g/mm and also contact electric resistance at a wire surface is regulated to 0.001-0.1OMEGA, by which spatter can be reduced and wire melting rate can be increased under stable arc, and, as a result, extremely superior weldability can be obtained. A figure shows a result of experiment on wire melting rate (dotted line) with respect to contact electric resistance at wire surface and also the amount of generated spatter (solid line) with respect to the above.