Microstructure and Wear Properties of Ni-W-Si Coatings by Laser Cladding

Abstract:

Ni-W-Si intermetallic composite coatings consisting of primary tungsten dendrites and eutectic W/WSi₂ were fabricated on 45 steel by laser cladding process using Ni-W-Si powder. The microstructure and composition of the coatings were characterized by SEM, XRD and EDS. The effect of the W content on the hardness and wear resistance of coatings was investigated. Results indicate that attributed to the high hardness and toughness of tungsten dendrites and fine and compact eutectic W/WSi₂, coatings had high hardness being 950HV in maximum and the wear resistance was elevated to 4-8 times higher.

• Periodical: Applied Mechanics and Materials (Volume 750)
• Pages: 214-219
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.750.214
• Online since: April 2015
• Authors: Xiao Peng Liu, Pei Lei Zhang*, Hua Yan, Yun Long Lu, Zhi Shui Yu, Chong Gui Li, Qing Hua Lu, Ding Ding Qiu
• Keywords: Coating, Laser Cladding, Microhardness, Microstructure

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