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Laser Cladding

Laser Cladding (Coating) Technology for Metallic Materials

Technology

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.

Pros

  • Overlay on a material with a high melting point is possible because it has high energy density.
  • Can be applied to brittle materials such as metal oxides in the form of a powder and a carbide
  • The dilution rate is low and its control is easy.
  • Cooling rate is fast because of low heat input (minimize cracking).
  • Form uniform structure with fine crystal grains and no segregation
  • Control of the alloy components is easy depending on the thickness of the cladding layer.
  • Local cladding is possible on a fine part.

Application of Laser Cladding

  • Maintenance of mold
  • Parts that requires high wear resistance and heat resistance in the automotive, shipbuilding, and aviation industries
  • Parts of drilling tools or hydraulic cylinders that demand high wear resistance and heat resistance

Application of Laser Cladding

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