US Patent 8946582 System and method for metal powder welding

A system and method for submerged arc metal powder welds includes modular programmable control of: a) a weld torch, and the position of the welding wire(s) from the torch traveling within a weld cavity, b) the rate of metal powder and welding flux added to the weld cavity ahead of the weld torch, c) the matching ratio between of metal powder and welding wire within the weld cavity, and d) a square wave welding torch power supply. An embodiment includes a controlled column and boom manipulator with up to six axes of motion and controlled motorized slide assemblies for single or multi-pass welds. A method of use is also disclosed.