Study of Wear on Nicraly Coating Sprayed by HVOF on 316 Steel and Laser CO2 Remelting Process

Silvelene Alessandra Silva; Ana Claudia Costa Oliveira; Glaucia Regina Pita; Maria Fernanda Souza Ferreira; Getúlio de Vasconcelos

doi:10.4028/www.scientific.net/MSF.930.322

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HomeMaterials Science ForumMaterials Science Forum Vol. 930Study of Wear on Nicraly Coating Sprayed by HVOF...

Study of Wear on Nicraly Coating Sprayed by HVOF on 316 Steel and Laser CO₂ Remelting Process

Abstract:

The use of NiCrAlY is a great alternative as Bond Coat - BC (bonding layer) in coatings for turbine vane, and it is possible to increase its life. This work aims to study the BC layer of NiCrAlY on the substrate of 316 steel which was deposited by the High Velocity Oxygen Fuel method (HVOF) and after laser remelting irradiated_. selective laser melting which is an innovative process. The laser treatment induced changes in porosity, microhardness and wear resistance. After spraying, the samples were irradiated with a CO₂ laser beam by varying the scan speed in 50, 100 e 200 mm/s. The speed at which the metallurgical bond between the coating and the substrate occurred was of 50 mm/s. A wear test was performed to analyze the thickness of the coating, which was 60 μm, and the hardness profile and hardness profile where it presented a higher hardness in the coating after the laser treatment. The investigations range included analysis of top surface of coatings by XRD characterization oxides formed types and microscopic investigations of coatings morphology.

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22nd Brazilian Conference on Materials Science and Engineering

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Periodical:

Materials Science Forum (Volume 930)

Pages:

322-326

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.930.322

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Online since:

September 2018

Authors:

Silvelene Alessandra Silva*, Ana Claudia Costa Oliveira, Glaucia Regina Pita, Maria Fernanda Souza Ferreira, Getúlio de Vasconcelos

Keywords:

Bond Coat, Laser CO₂, NiCrAlY, TBC, Turbines

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