Method of high-current-density gas-shielded arc welding using a flux-cored wire

摘要

Disclosed is a method for performing gas-shielded pulsed arc welding at high current densities with a flux-cored wire as an electrode wire. The pulsed arc welding is carried out by passing a pulsed current so that a pulse peak current (Ip) density during a pulse peak time (Tp) is 400 to 950 A/mm 2 , a pulse base current (Ib) density during a pulse base time (Tb) is 200 A/mm 2 or more and differs from the pulse peak current density by 200 to 400 A/mm 2 , and an average current density is 350 to 750 A/mm 2 . The method allows significant spatter reduction while attaining a high deposition rate.