Metal Surface Coating Through Welding Processes

Abstract

The  adversity  of  service  conditions  limits  the  service  life  of  components.  The replacement cost of the components is extremely high. Surfacing technique offers benefits in reducing materials costs and, in salvage applications, enables an expensive or difficult-to-replace part to be reclaimed and restored to operation with minimum of downtime. Industries  involved  in  surfacing  operations  use  various  fusion  welding  especially  arc  welding  processes. These operations demand high deposition rates but at low penetration values in the base metal.  The success of any overlaying operation depends on proper established welding procedure. The most appropriate procedure should be related to the particular part being surfaced and the composition or analysis of the part. This paper reviews various surfacing operations and the selection of an appropriate welding process for the required application