Study on Microstructure and High Temperature Oxidation Resistance of Laser Cladding Coating Prepared by Ni60-TiO2-B4C-Al Powders

Fang Zhou; Hui Yao Yang; Liang Hua He

doi:10.4028/www.scientific.net/AMM.488-489.201

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 488-489Study on Microstructure and High Temperature...

Study on Microstructure and High Temperature Oxidation Resistance of Laser Cladding Coating Prepared by Ni60-TiO₂-B₄C-Al Powders

Abstract:

The composite coating with TiC-TiB₂-Ni₃Al was fabricated on 45 steel by laser cladding. The microstructure and high temperature oxidation resistance of coating were investigated. The results show that, the main phases of coating are α-Fe, TiC, TiB₂, Ni₃Al, (Fe,Cr)₇C₃ and Al₂O₃. The interface of coating and substrate material is metallurgical bond; the coating is uniform and dense without cracks and pores. The fine particles of TiC and TiB₂ disperse uniformly in the coating. After oxidized at 1000°C for 60 h, the oxidation film is consisted of spherical oxides of Al, Ti and Cr, they can hinder the diffusion between oxygen and metal atoms and make the coating possess outstanding high temperature oxidation resistance.

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Periodical:

Applied Mechanics and Materials (Volumes 488-489)

Pages:

201-204

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.488-489.201

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Online since:

January 2014

Authors:

Fang Zhou*, Hui Yao Yang, Liang Hua He

Keywords:

Coating, Laser Cladding, Microstructure, Oxidation Resistance

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