Journal
METALS
Volume 7, Issue 10, Pages -Publisher
MDPI AG
DOI: 10.3390/met7100435
Keywords
microstructure; corrosion resistance; coating; laser cladding; 35CrMo steel
Funding
- Major State Basic Research Development Program of China [2014CB046702]
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The effect of laser cladding on the surface microstructure and corrosion properties of coated/uncoated specimens were investigated. Fe-based alloy coating was produced on 35CrMo steel by laser cladding. The phase composition, microstructure, interface element distribution, microhardness and corrosion resistance of the cladding coating were measured. The results show that the cladding layer is mainly composed of alpha-Fe phases, the microstructure presents a gradient distribution, and a good metallurgical bond is formed at the boundary with the substrate. Microhardness profiles show that the average microhardness of the cladding coating is about 2.1 times higher than that of the uncoated specimen. In addition, the electrochemical results show that the coated specimen exhibits far better corrosion resistance than to the uncoated specimen.
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