WC Particles Reinforced Co-Based Alloy Coatings Produced by Laser Cladding

Abstract:

To extend the service life of hot die steel (H13), WC particles reinforced Co-based alloy composite coatings were produced by laser cladding. The microstructure evolution and performance of the cladding layer were investigated. The experiment results showed that there existed fine dendritic crystals and dispersive WC particles in the cladding layer. The coatings were mainly composed of γ-Co, WC and Co₃W₃C phases. The microhardness of the cladding layer was higher than that of the arc surfacing layer, and the microhardness gradually increased with WC content. Compared to the substrate, the friction coefficient of the cladding layer reduced greatly. The coatings with 15wt.% WC possess the best wear resistance.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 695-701
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.695
• Online since: March 2016
• Authors: Jia Zi Zhang, Guang Yuan Wang, Yuan Qin, Sen Yang*
• Keywords: Cobalt Based Composite, Friction, Hot-Working Die, Laser Cladding, Wear

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