A study on powder mixing for high fracture toughness and wear resistance of WC–Co–Cr coatings sprayed by HVOF

Lee, C.W.; Han, Jun Hyun; Yoon, Jeong Hyun; Shin, Myung-Soo; Kwun, S.I.

doi:10.1016/j.surfcoat.2009.12.014

Cited by 100 publications

(26 citation statements)

References 16 publications

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“…The effect of fracture toughness on coating wear performance was investigated widely. High fracture toughness was beneficial to wear resistance of coatings [14]. While Gang-Chang Ji [15] reported the removal of carbide particles in the coating was mainly responsible for the abrasive wear of the coating.…”

Section: Introductionmentioning

confidence: 98%

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

et al. 2017

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Abstract:In this work, the Cr 3 C 2 -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 Cr 3 C 2 -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 Cr 3 C 2 -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.

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Section: Introductionmentioning

confidence: 98%

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

et al. 2017

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“…Additionally, it is important to focus on the WC decomposition in WC-Co and WCCo-Cr coatings considering its significant effects on the properties of these coatings. Some studies have suggested that the degree of decomposition of the WC phase could be controlled by the spray process, spray parameters and properties of the feedstock powders, especially the primary WC particle size, which significantly affects the coating characteristics, such as the phase, microstructure and abrasive wear resistance [11,18,19].…”

Section: Introductionmentioning

confidence: 99%

Influence of WC carbide particle size on the microstructure and abrasive wear behavior of WC–10Co–4Cr coatings for aircraft landing gear

Gong

Yao

Zuo

et al. 2016

Wear

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“…The toughness is another key factor for wear resistance of the nitrided layer because the plastic deformation can withstand a part of stress when the treated samples are subjected to rigorous service environments involving high shear, compression, and impact loading conditions . Indentation testing is a widely used method to evaluate the toughness of the nitrided layer via the observation of cracking behavior .…”

Section: Resultsmentioning

confidence: 99%

Two‐Step Nitriding Behavior of Pure Iron with a Nanostructured Surface Layer

Sun

Mei

et al. 2019

Adv Eng Mater

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A two-step gas nitriding treatment (280 C for 2 h plus 550 C for 6 h) is designed for pure iron with a nanostructured surface layer induced by surface mechanical attrition treatment (SMAT). The microstructure and surface properties of the SMAT sample after two-step nitriding treatment are investigated in comparison with those of the SMAT sample after single-step nitriding treatment (550 C for 6 h). Experimental results show that a much thicker compound layer (up to 25 μm in thickness) is generated on the surface of the SMAT sample after twostep nitriding treatment, in which the mean grain size of the Fe 2-3 N phase is below 25 nm. The enhanced nitriding kinetic may be attributed to the formation of a large number of Fe(N) solid solutions and a small amount of dispersed Fe 2-3 N particles on the SMAT sample after first low-temperature nitriding, which enhances the thermal stability of nanostructured iron grains. Due to the enhanced nitriding kinetic and refined nitride structure, the SMAT sample after two-step nitriding treatment displays higher surface hardness and improved wear resistance relative to its single-step nitrided counterpart.

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A study on powder mixing for high fracture toughness and wear resistance of WC–Co–Cr coatings sprayed by HVOF

Cited by 100 publications

References 16 publications

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

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

Influence of WC carbide particle size on the microstructure and abrasive wear behavior of WC–10Co–4Cr coatings for aircraft landing gear

Two‐Step Nitriding Behavior of Pure Iron with a Nanostructured Surface Layer

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