Wear behaviour of WC–Co HVOF coatings at different temperatures in air and argon

Geng, Zhe; Li, S.; Duan, Deli; Liu, Y.

doi:10.1016/j.wear.2015.01.035

Cited by 77 publications

(30 citation statements)

References 26 publications

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“…Silicon nitride balls with a diameter of 5 mm were used as the counter surface; a new ball was used for each test. Si 3 N 4 was used as the counter surface because it is harder than WC-Co, is one of the most widely utilized industrial ceramics, and has been used in many studies on WC-Co coatings [30,43,46]. The wear tests were run for 60 min utilizing a normal load of 100 N, a stroke length of 5 mm, and a frequency of 2 Hz.…”

Section: Mechanical and Tribological Characterizationmentioning

confidence: 99%

“…Both HVOF and APS coating deposition techniques were utilized here as they are the two most widely employed industrial methods of depositing protective WC-Co coatings. WC-Co coatings are often utilized under elevated temperature environments, typically below 450 °C [43], and previous studies have demonstrated that wear performance at elevated temperatures is dependent on both the spray deposition technique, as well as the counter-surface employed [43][44][45][46]. WC-Co coatings are generally not utilized at temperatures higher than 450 °C because decarburization occurs rapidly and leads to subsequent embrittlement of the coatings.…”

Section: Introductionmentioning

confidence: 99%

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Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Nieto

Kim

Penkov

et al. 2017

Surface and Coatings Technology

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This study investigates the effects of nanodiamonds (ND) on the wear behavior of WC-Co coatings during dry sliding under ambient and elevated temperature environments. The nanometric dimensions and exceptional hardness of ND are envisioned to enhance hardness while maintaining toughness, thereby enhancing wear resistance. ND reinforced WC-Co coatings were successfully fabricated by high velocity oxygen fuel spray (HVOF) and air plasma spraying (APS). The tribological behavior of WC-Co-ND composite coatings was evaluated at room temperature and at 300 °C using reciprocating dry sliding wear tests. At room temperature, the addition of ND led to an enhancement in wear resistance of 8.5% and 13% in HVOF and APS coatings, respectively. The composite coatings exhibited increased formation of a protective silica tribolayer, which was attributed to enhanced heat transfer induced by the excellent thermal conductivity of diamond. At 300 °C, however, the composite coatings exhibited poorer wear resistance than the counterpart WC-Co coatings as a result of the degradation of the ND phase. The loss of the diamond phase was believed to decrease hardness and weaken splat interfaces, which led to more facile delamination in HVOF coatings, as well as severe brittle wear and fracture in APS coatings.

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Section: Mechanical and Tribological Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Nieto

Kim

Penkov

et al. 2017

Surface and Coatings Technology

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“…Se observa que la muestra a) presenta una unión mecánica en la interface sin presencia de discontinuidades sin embargo la muestra b) la muestra presenta una discontinuidad notoria en la interface lo cual perjudica de forma detrimental la adherencia del recubrimiento debido a la no coalescencia con el sustrato. Cuando las relaciones de Propileno/Oxígeno (c/o) son altas, la relación estequiometrica de combustión se aleja más debido a un mayor contenido de Oxígeno, teniendo especies oxidadas en su superficie, lo que promueve que el recubrimiento no logre un anclaje suficiente en la superficie del material que será reparado por la técnica de HVOF [8,9], lo cual afecta fuertemente su adherencia. …”

Section: Figura 5 Resultados De Adherencia Del Diseño De Experimentounclassified

Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado) y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2

Chavez¹,

Acevedo-Dávila²,

Gutiérrez³

et al. 2016

Soldag. insp.

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Este es un artículo publicado en acceso (Open Access) abierto bajo la licencia Creative Commons Attribution NonCommercial, que permite su uso, distribución y reproducción en cualquier medio, sin restricciones siempre que sin fines comerciales y que el trabajo original sea debidamente citado. Resumen: Las aleaciones de Fe-Cr-Mo se utilizan en recubrimientos para proteger componentes que están sometidos a condiciones de desgaste y corrosión. La alta velocidad de deposición del metalizado térmico (HVOF) (High Velocity Oxi-Fuel) aplicado en aleaciones de acero grado herramienta para trabajo en frío con la aplicación de sustratos Fe-Cr-Mo ha mostrado buenos resultados en los campos de proyección. El HOVF es un método atractivo para aplicar revestimientos y recuperar diámetros que fueron desgastados durante el proceso de operación. Nuevas superficies y materiales pueden ser provistos sin la distorsión causada por los procesos convencionales de soldadura. Para aquellos materiales que son susceptibles a agrietarse gracias a la formación de fases fuera de equilibrio duras con composiciones con altos contenidos de carbono y de cromo, debido a las condiciones del proceso que combinan una temperatura de la flama relativamente baja y con un tiempo de baja exposición. La microestructura las características del recubrimiento son determinadas por las propiedades físicas y químicas de las partículas impregnadas en el sustrato que a su vez dependen de una gran cantidad de parámetros como el diseño de pistola, la relación de oxígeno / combustible, método de inyección, tamaño de partícula y forma, entre otros La presente investigación estudia la influencia de los parámetros de procesamiento sobre las propiedades mecánicas y microestructurales del recubrimiento Diamalloy 1008 (aleación en mezcla de Fe-Cr-Mo) revestimiento aplicado con Oxí-combustible de alta velocidad (HVOF) y cinco diferentes tipos de electrodos aplicados por soldadura, TIG (GTAW) en un acero grado herramienta para trabajo en frio. El objetivo de estos recubrimientos se utiliza habitualmente como una protección contra la corrosión y el desgaste, pero también tienen la capacidad de recuperar las zonas dañadas como es el caso de los dados de estampado de la industria automotriz. Las muestras se caracterizaron mediante microscopía óptica y electrónica de barrido para evaluar la calidad del material depositado en el sustrato; microdureza Vickers y Pin-Ball Disc se utilizaron para cuantificar las propiedades mecánicas de los recubrimientos.Palabras-clave: GTAW; HVOF; Desgaste. Tribological and Microstructural Behavior of Coatings Applied by GTAW and HVOF-thermal Spraying Process and Used in Recovering of AISI/ SAE D2 Tool SteelAbstract: The Fe-Cr-Mo alloys are use in covers to protect the components that are under wear and corrosion. The high velocity thermo spray covering by HVOF (high velocity oxi-fuel) in Fe-Cr-Mo alloys has reported as a good result in projection fields for the steel tool grade for cold work. The HOVF is an attractive method to apply covering and re...

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“…The average porosity of CoCrAlYTa-10%Al 2 O 3 coating was determined to be a relatively low value of 0.44% (the value range is 0.37%-0.58%) by image analysis. During thermal spraying process, molten or semimolten droplets impacted on the substrate and rapidly cooled to form a laminar coating composed of many layers where the pores mostly existed [8]. The added Al 2 O 3 particles were normally drawn into the pores of the coating, resulting in a lower porosity of the as-sprayed coating [19].…”

Section: Phase and Microstructures Of The Cocralyta-10%al 2 O 3 Coatingmentioning

confidence: 99%

“…Common processes for the MCrAlX coatings deposition are low pressure plasma spraying (LPPS), vacuum plasma spraying (VPS) and high velocity oxy-fuel (HVOF) thermal spraying [1,[4][5][6]. Because of the high particle velocities and relatively low flame temperatures induced in the deposition process, HVOF thermal spraying has become more widely used with relatively high density for the prepared coating (porosity1%) and superior coating-substrate adhesion, which improved the mechanical properties of the coating [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization and evolution under high temperature oxidation of CoCrAlYTa-10%Al₂O₃ coating deposited by high-velocity oxygen fuel thermal spraying

Hong

Yang

et al. 2020

Mater. Res. Express

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The CoCrAlYTa-10%Al 2 O 3 coating was fabricated on H13 steel substrate using high-velocity oxygen fuel (HVOF) thermal spraying. A detail characterization on the microstructures, element distribution and phase composition of the HVOF sprayed CoCrAlYTa-10%Al 2 O 3 coating was conducted using scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD) and transmission electron microscopy (TEM). The microstructural evolution and microhardness of the coating at different temperatures were investigated. The results showed that the coating had a dense and uniform microstructure with a low porosity of 0.44%. The primary phases for the CoCrAlYTa-10%Al 2 O 3 coating were identified as Co-based solid solution, Cr-based solid solution, Al 2 O 3 phase and TaC particles. Compounds such as Cr 7 C 3 , Al 13 Co 4 and aluminum-yttrium oxides Al 5 Y 3 O 12 were also confirmed by TEM observation results. Owing to the rapidly cooling rates of the molten droplets, nano-crystalline phase was existed in the coating. The average microhardness of the coating was 640 HV 0.1 . Its high microhardness derived from the presence of certain volume fraction of hard Al 2 O 3 , Cr 7 C 3 and TaC grains within the coating. After 1h of oxidation, oxides like CrO 2 and Ta 2 O 5 were formed when the coating exposed at the temperature up to 800°C. At the temperature above 600°C, the hardness of the coating remained at a high level (600 HV 0.1 ). It possessed better high temperature softening resistance than H13 steel, indicated that the coating exhibited good mechanical properties at high temperature.

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Wear behaviour of WC–Co HVOF coatings at different temperatures in air and argon

Cited by 77 publications

References 26 publications

Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado) y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2

Microstructural characterization and evolution under high temperature oxidation of CoCrAlYTa-10%Al₂O₃ coating deposited by high-velocity oxygen fuel thermal spraying

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Wear behaviour of WC–Co HVOF coatings at different temperatures in air and argon

Cited by 77 publications

References 26 publications

Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Elevated temperature wear behavior of thermally sprayed WC-Co/nanodiamond composite coatings

Comportamiento Tribológico y Microestructural en Recubrimientos Aplicados por GTAW y HVOF (Proceso Térmico de Espreado) y Usado en Recuperación de Aceros Grado Herramienta AISI/SAE D2

Microstructural characterization and evolution under high temperature oxidation of CoCrAlYTa-10%Al2O3 coating deposited by high-velocity oxygen fuel thermal spraying

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Microstructural characterization and evolution under high temperature oxidation of CoCrAlYTa-10%Al₂O₃ coating deposited by high-velocity oxygen fuel thermal spraying