Comparison of properties of coatings produced by laser cladding and conventional methods

AbstractWear resistant coatings of hardfacing alloys can be produced with powders by using various techniques such as laser cladding (LC), plasma transferred arc (PTA) welding, atmospheric plasma spraying (APS), etc. The properties of coatings applied using these techniques differ slightly owing to the manufacturing process, despite having the same chemical composition. The coating microstructures and properties (such as hardness, wear resistance, and corrosion resistance) of nickel base hardfacing alloys produced by LC, PTA welding, and APS have been studied. Estimates of realistic coating thickness, coating rate, powder consumption, and the influence of temperature on the substrate material during LC, PTA welding, and APS are given.MST/1696