Patent ID: 7989732
Filing Date: 2011-08-02
Classification: B23K

Abstract:
1. A method of AC welding involving polarity reversal and a plasma column during welding, said method comprising: (a) preparing a particulate arc stabilizing compound by (b) preparing a core material by combining said dehydrated sodium-silico-titanate compound with a second titanium dioxide; (c) forming a cored electrode by placing said core material into a steel sheath; (d) feeding said cored electrode toward a workpiece; (e) supplying AC current from a power source to said cored electrode to cause at least a portion of said electrode to melt and deposit metal from said electrode onto the workpiece, said AC current having a given waveform; (f) supplying a shielding gas, said shielding gas at least partially surrounding said advancing electrode; and (g) said addition of said dehydrated sodium-silico-titanate compound stabilizing said plasma column during polarity reversal in said method compared to said plasma column without said addition of said sodium-silico-titanate compound.