Comportamiento del desgaste erosivo en recubrimientos depositados por la técnica de proyección térmica//Erosive wear behavior in coatings deposited by thermal spraying technique

Authors

  • Miguel Ángel Reyes-Mojena Universidad de Oriente, Facultad de Ingeniería Mecánica. Santiago de Cuba

Abstract

Se realiza un estudio del desgaste erosivo en dos recubrimientos de carburos de tunsgteno (WC-10Co-4Cr y WC-12Co) y cromo (Cr3C2-25NiCr), depositados por proyección térmica con llama a baja velocidad (Flame Spray, FS) e hipersónica, (High Velocity Oxygen Fuel, HVOF). En el método FS se emplearon para los depósitos materiales en forma de cordón (Flexicords, FS/FC), a fin de caracterizar sus propiedades mecánicas y resistencia al desgaste erosivo, no reportados por la literatura. La evaluación tribológica se realizó en un tribómetro de recipiente de mezcla, empleándose en calidad de variables la velocidad y el ángulo de impacto de las partículas erosivas. La morfología superficial se examinó utilizando imágenes de microscopia electrónica de barrido (MEB) y permitió analizar el mecanismo de erosión presente. El recubrimiento de mejor resistencia por erosión fue el WC-Co-Cr (HVOF). Los recubrimientos FS/FC son una alternativa económica para aplicaciones de poca accesibilidad y más bajo costo.

Palabras claves: proyección térmica, recubrimiento, desgaste erosivo, HVOF.
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Abstract

A study of the behavior of erosive wear was performed on two cemented carbides (WC-10Co-4Cr and WC-12Co) and chromium carbides (Cr3C2-25NiCr), deposited through methods thermal spray flame at low speed (flame Spray, FS) and hypersonic (High velocity Oxygen Fuel, HVOF). In the FS method novel materials were used as a deposit in the form of cord (Flexicords, FS/FC), in order to obtain their mechanical properties and erosive wear behavior, not reported in the literature. Tribological coatings tests were performed using a slurry tribometer, using as variables speed and impact angle of the erosive particles. The surface morphology was examined using electron microscopy images (SEM), able to analyze the erosion mechanism. It was observed that the WC-Co-Cr coating (HVOF) exhibits the best erosion resistance for more severe experimental conditions. Despite the better results of HVOF coatings, those obtained with the FS/FC are an economic option for inaccessibility applications and lower cost.

Key words: thermal spray, coating, erosive wear, HVOF.

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How to Cite

1.
Reyes-Mojena M Ángel. Comportamiento del desgaste erosivo en recubrimientos depositados por la técnica de proyección térmica//Erosive wear behavior in coatings deposited by thermal spraying technique. Ing. Mec. [Internet]. 2016 Sep. 1 [cited 2025 Sep. 13];19(3):158-66. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/547

Issue

Vol. 19 No. 3 (2016): septiembre-diciembre

Section

Original article

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