Wear and Corrosion Behaviours of FeCrNiSi Alloy Coatings by Laser Cladding

Abstract:

Soft and hard FeCrNiSi alloy coatings were obtained on 30CrMo alloy steel surface by laser cladding. The phase constitution, microstructure, frictional wear behavior and corrosion resistance of the composite coating were analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM), three-dimensional non-contact surface mapping, friction and wear testing machine and electrochemical workstation, separately. XRD analysis showed that the cladding layer was mainly composed of Fe-based alloy composition, accompanied by a small amount of cobalt nickel alloy. There were massive protrusions in the interface of the soft sample, and the coating was regularly dendritic. Hard sample coating lines were cluttered, and there was no bulk deposition. Under the same wear condition, the soft coating exhibited serious abrasive wear, while the hard coating had slight abrasive wear behavior. The polarization curves in 3%NaCl solution revealed that the self-corrosion potential of the soft coating was positive shifted more than that the hard coating. The soft coating has better corrosion resistance than the hard coating.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1406-1413
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1406
• Online since: June 2017
• Authors: Yu Long Qi*, Hai Yan Chen, Chen Yang Shu, Xuan Zhao, Li Hua Dong, Yan Sheng Yin, Zhi Chun Yang
• Keywords: Electrochemical Corrosion, FeCrNiSi Alloy, Laser Cladding, Wear Test

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