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Laser cladding is an advanced surface engineering technology that uses a high-energy laser beam to melt and fuse a protective coating onto a component’s surface, creating a metallurgically bonded layer. This improves the surface properties of components, including their resistance to wear, corrosion, and heat, as well as extending their service life.
Unlike traditional coating methods such as thermal spraying or electroplating, laser cladding creates a strong metallurgical bond with minimal heat input and a small heat-affected zone. This allows for the precise repair and enhancement of the surfaces of high-value parts, while maintaining the original dimensional accuracy and mechanical properties of the substrate.
Common cladding materials include:
Laser cladding is widely used for repairing expensive components, extending equipment lifespan, and improving the performance of parts exposed to harsh operating conditions.
The laser cladding process involves several controlled steps that work together to create a durable, high-performance surface layer.
Before cladding, the component surface is cleaned and prepared to remove oil, rust, oxides, and other contaminants. Proper surface preparation ensures better bonding quality between the coating material and the substrate.
Metallic or composite powder is continuously delivered to the processing area via a powder feeding system. The flow rate of the powder is precisely controlled according to the requirements of the coating.
A focused laser beam generates a high level of energy density, melting both the powdered material and a thin layer of the substrate’s surface. The molten materials then combine and solidify rapidly, forming a strong metallurgical bond.
The laser head moves along the programmed path, depositing overlapping tracks of coating material to create a uniform protective layer. Multiple layers can be applied to achieve the required thickness and performance.
After laser irradiation, the molten pool cools and solidifies rapidly, producing a dense coating structure with low porosity and excellent mechanical properties.
Additional processes such as machining, grinding, polishing or heat treatment may be performed depending on application requirements to achieve the required surface finish and dimensional accuracy.
