Fabrication of Multiple Ceramic Particle Reinforced Iron Matrix Coating by Laser Cladding

Abstract

Multiple ceramic particle reinforced iron matrix coatings were produced by laser beam melting mixture of B₄C, TiO₂, Al, and Fe-based self-melting powders. The results showed that the coating were mainly composed of α-Fe, TiB₂, and TiC. TiB₂ grains showed rectangle structures with deep grey, and that TiC grains exhibited near-cubic morphologies with light grey in the coating. The amount, type, and size of the reinforcements were influenced by the content of B₄C, TiO₂, and Al. Compared to the substrate, wear resistance of the composite coatings were significantly improved. Furthermore, the coatings possessed more effective protection for scratching and plastic deformation.

Keywords:

• Ceramics
• Laser
• Microstructure
• Wear