Titanium-diamond weld hardfacing composition, method and apparatus

Abstract

A hard-clad coating composition for hardfacing is described. Also described is a weld hardfacing method for applying a coating composition to a base metal, and an apparatus for introducing the coating composition to the weld process.

1 . A mixing and feeding apparatus for mixing a hard-clad coating composition and introducing it into a gas metal arc welding process comprising a first container for holding and dispensing a first constituent material, a second container for holding and dispensing a second constituent material, a mixer for introducing the first constituent material into a mixing container at a determined rate, a mixer for introducing the second constituent material into the mixing container at a determined rate to form the hard-clad coating composition, and a feeder for supplying the hard-clad coating composition to the gas metal arc welding process. 
     
     
         2 . The apparatus of  claim 1 , wherein at least one of the a cylindrical wheel rotatably fitted within a wheel chamber, which wheel has holes bored therein which are sized and located on the wheel such that when the wheel rotates within the wheel chamber, the holes fill with constituent material at one side of the wheel chamber as the holes rotate through the constituent material, and are then emptied at the other side of the wheel chamber as the wheel continues to rotate. 
     
     
         3 . The apparatus of  claim 2 , wherein at least one of the cylindrical wheels is attached to a variable speed motor such that the speed at which the cylindrical wheel rotates can be varied and the rate at which constituent material is supplied to the mixing container can thus be controlled. 
     
     
         4 . The apparatus of  claim 1 , wherein the feeder is a feeder tube is attached to an MIG gun used in the gas metal arc welding process, and the hard-clad coating composition advances through the feeder due to gravity and vibration caused by oscillations of the MIG gun.