Abstract:
Electric arc overlay welding, often called arc cladding, on a metallic backing which in many cases will be a steel backing. A barrier strip rests on the backing and a strip electrode spaced from the backing arcs to the barrier strip. The barrier strip or the strip electrode made by powder metallurgy has a metal oxide such as iron oxide included in it which oxidizes carbon picked up from the metal backing.
Abstract:
Electric arc overlay welding, often called arc cladding, on a metallic backing, which in many cases is of steel. A barrier strip rests on the backing and a nonconsumable electrode arcs to the barrier strip. In one form of the invention the nonconsumable electrode oscillates back and forth across the barrier strip as it moves forward and in some cases it goes beyond the barrier strip and arcs to a previous weld bead beside the barrier strip. In one form of the invention the barrier strip is of green or unsintered compacted metal particles. The barrier strip may contain flux and it may contain deoxidizer.