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Coatings 2017, 7(7), 98; https://doi.org/10.3390/coatings7070098

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

1
Maanshan Ma Steel Surface Engineering Technology Co. Ltd., Maanshan 243000, China
2
Research Center of Modern Surface & Interface Engineering, Anhui University of Technology, Maanshan 243002, China
3
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China
*
Author to whom correspondence should be addressed.
Received: 14 April 2017 / Revised: 26 June 2017 / Accepted: 27 June 2017 / Published: 9 July 2017
(This article belongs to the Special Issue Thermal Spray Technology)
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Abstract

In this work, the Cr3C2-25% NiCr powder was deposited on stainless steel with different combustion pressures and powder feed rates using HVOF technique. The microstructure, porosity, micro-hardness, indentation fracture toughness, adhesion strength, and wear resistance at 500 °C of the coatings were investigated. The results showed that HVOF sprayed Cr3C2-25% NiCr coatings possessed low porosity, high micro-hardness, and enough adhesion strength. The powder feed rate had obvious effect on porosity, micro-hardness and indention fracture toughness of the coatings, and the coating sprayed under the powder feed rate of 33.5 g/min possessed the optimal performance. The wear tests illustrated that the HVOF sprayed Cr3C2-25NiCr coating possessed good wear resistance at the temperature of 500 °C, in which the coating sprayed at the powder feed rate of 33.5 g/min had the best wear resistance due to its dense structure and enough fracture toughness. View Full-Text
Keywords: Cr3C2-25 NiCr coating; adhesion strength; powder feed rate; wear resistance Cr3C2-25 NiCr coating; adhesion strength; powder feed rate; wear resistance
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Xie, M.; Lin, Y.; Ke, P.; Wang, S.; Zhang, S.; Zhen, Z.; Ge, L. Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings. Coatings 2017, 7, 98.

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