Laser Cladding (Coating) Technology for Metallic Materials
Laser cladding technology, a type of overlay (Overlay Welding), is classified as a form of surface
modification using a laser. It is a method of depositing material by which a powdered or wire
feedstock material is melted and consolidated by the use of a laser to form a metal coating
(several mm thickness), which has a high wear resistance, corrosion resistance, and heat
resistance. Nickel-based, cobalt-based, iron-based metal powder or wire is used in accordance
with the surface properties of the material.
The laser cladding method has fast cooling and solidification rate because the overall heat input
is less than the plasma-transferred arc method or arc welding, and the dilution rate with the
parent material is low. It also has a fine crystal grain. Because it can form a uniform structure
without any segregation, and local coating is possible, its application is gradually expanding to
the maintenance and development of molds, repair of machine parts, automotive and marine
parts manufacturing, and surface coating of the steel industry.
Application of Laser Cladding