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

Abstracts Three kinds of Fe-based power with different content of nano-WC were successfully prepared on 35CrMoV steel using laser cladding technique. The influence of nano-WC on the macro-morphology, microstructure and wear resistance of Fe-based coatings under different wear conditions was investigated by scanning electron microscopy and three-dimensional non-contact surface mapping. It has been found that a lot of fine grains and equiaxed grains synthesized with the addition of nano-WC. Both the volume fraction of eutectics and wear resistance of Fe-based coatings are greatly increased with a moderate addition of nano-WC, which is attributed to the exist of the partial dissolution of hard and high temperature WC phase in the composite coating. The wear rates increase more than 2–3 times with the addition of nano-WC range from 5 wt% WC to 10 wt%WC. Hence the addition of nano-WC strengthening phase is an effective and feasible way to improve the mechanical properties, especial for the tribological properties.

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Surface Strengthening and Friction Wear of the Inner Wall of Liquid Sodium Hydrostatic Bearing

Yang¹,

Yang²,

Cao³

et al. 2022

Surf. Rev. Lett.

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Sodium hydrodynamic bearings are parts which are easy to wear in order to improve the wear resistance of the inner wall and prolong the service life. In this paper, high-temperature element W was used as a variable to prepare cobalt-based alloy coatings with different contents of W. By testing the hardness and anti-wear performance of the coatings at high temperature, the microstructure and wear mechanism of the coatings were further analyzed in combination with crystal phase diagram and microscopic morphology diagram. The results show that the coefficient of friction of cobalt-based alloy coating decreases with the increase of W content under high-temperature dry rubbing, while the wear quantity increases with the increase of W content. Under high-temperature oil lubrication, the coefficient of friction of cobalt-based alloy coating is the lowest when the W content is 12%. The wear amount of cobalt-based alloy coating decreases with the increase of W content, and the wear mechanism changes from adhesion wear to abrasive wear with the increase of W content.

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

Cited by 3 publications

References 11 publications

Effect of WC particles with different shapes during plasma spray on the properties of Fe-based composites coatings

Effect of WC particles with different shapes during plasma spray on the properties of Fe-based composites coatings

Effect of nano-WC content on microstructures and wear resistance of laser cladding Fe-based alloy coatings

Surface Strengthening and Friction Wear of the Inner Wall of Liquid Sodium Hydrostatic Bearing

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