Patent ID: 9321132
Filing Date: 2016-04-26
CPC Classification: B23K

Claim Text:
1. A laser/arc hybrid welding process using an electric arc and a laser beam in combination together in a single weld pool, comprising; providing the weld metal by melting a consumable wire, producing the weld pool in at least one steel workpiece comprising an aluminum-based surface coating, and using a shielding gas, wherein the consumable wire contains at least 3 wt % and at most 20 wt % of one or more gammagenic elements and the shielding gas is formed of at least 2 vol % to less than 10 vol % of nitrogen or oxygen, and helium or argon, thereby promoting the formation of a uniform martensite microstructure in a weld-metal zone formed by hot-drawing and quenching.