The evolution of multi and hierarchical carbides and their collaborative wear-resisting effects in CoCrNi/WC composite coatings via laser cladding

Ma, Guoliang; Cui, Hongzhi; Jiang, Di; Chen, Hao; Hu, Xiaosong; Zhang, Guosong; Ren, Wei; Sun, Xiaohong; Song, Xiaojie

doi:10.1016/j.mtcomm.2022.103223

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…The relative wear resistance of the coating with 16 wt.% WC is approximately 16.3 and 9.7 times higher than those of the substrate and coating without WC, respectively. The enhanced wear resistance of the composite coatings benefited from their improved microhardness with WC addition, similar to results of previous researches [35][36][37].…”

Section: Wear Performancesupporting

confidence: 89%

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Wei

Tang²,

Tong

et al. 2022

Coatings

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As the core component of the wind turbine transmission chain, the wind power gear plays a vital role in the safe and efficient operation of the whole machine. Wind power gears are subjected to varying degrees of wear on their contact surfaces due to alternating load impacts. For wind power gear repair and remanufacturing, laser cladding technology is proposed on the wind power gearbospline shaft. The effect of tungsten carbide (WC) addition on the laser-clad Fe-based coatings was investigated in this study. The morphology and composition of the composite coatings formed with different proportions of WC were studied using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The microhardness and wear resistance were measured with a digital microhardness tester and a wear testing machine, respectively. The coatings were compact with no apparent cracks or pores and the microstructures of the regions above the fusion zone gradually changed from planar crystal to columnar crystal and cellular crystal, while the middle and upper parts of the coating mainly consisted of equiaxed crystals. The microhardness of the coatings gradually increased with the increase of WC content. The coating with 16% WC addition reached a maximum microhardness of 826.2 HV. The increase of WC content improved the wear resistance of the laser-clad Fe-based composite coatings. The wear mechanism of the coatings was mainly abrasive wear, along with slight adhesion wear and oxidative wear.

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Section: Wear Performancesupporting

confidence: 89%

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Wei

Tang²,

Tong

et al. 2022

Coatings

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“…The reason for this choice is the excellent high-temperature resistance, wear resistance, and corrosion resistance of ceramics. Common additive ceramic phases were TiC, [64][65][66] B 4 C, [67,68] WC, [69][70][71] NbC, [72,73] etc. After the addition of the ceramics, the hardness of the coating became significantly increased as compared with the original HEA coating.…”

Section: High-hardness Hea-based Composite Coatingsmentioning

confidence: 99%

“…Among these coatings, the TiC 15 coating had the best wear‐resistance, which was due to the highest hardness, which was twice as high as for the TiC 0 coating. In addition, Ma et al [ 69 ] prepared CoCrNi‐ x WC ( x = 0, 5, 15, or 25) HEA‐LC composite coatings on a Q235 steel substrate, and the addition of WC promoted the generation of W 2 C + Cr 23 C 6 + Cr 7 C 3 phases. The second type of phase‐strengthening caused by multilayer carbides, reduced the wear rate of the WC 25 coating by 75%.…”

Section: Hea‐based Composite Coatingsmentioning

confidence: 99%

Wear‐Resistance of High‐Entropy Alloy Coatings and High‐Entropy Alloy‐Based Composite Coatings Prepared by the Laser Cladding Technology: A Review

Xie,

Tong,

Bai

et al. 2023

Adv Eng Mater

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With the continuous development of the aviation and aerospace industries, there is an increasing demand for surface coatings that can enhance the wear‐resistance and lubricity of substrates. High‐entropy alloy (HEA) coatings and high‐entropy alloy‐based composite coatings (including ceramic and lubricating phases) have attracted large attention, which is due to their excellent properties. They have, therefore, developed rapidly in the past decade. This article reviews the current status of research on the tribological properties of the HEA coatings and HEA‐based composite coatings that have been prepared by laser cladding technology. The focus is then on the wear‐resistance and wear‐reduction mechanism of the coatings. Furthermore, the review analyzes the influence of element addition, atomic ratio change, and process parameters on the coating organization and properties. The problems that have to be solved in the development of tribology‐based HEAs coatings, and the expected future development of HEA the coatings, are also discussed.

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“…Prior to laser cladding, the surface of TC4 is covered with a layer of oxide film, oil and impurities, which affect the formability of the laser cladding and the bonding of the substrate to the coating. Alcohol is perfectly adequate to achieve the desired effect and has been used by others who have conducted similar experiments [17,18]. Prior to the cladding experiment, the uncoated area was preheated with a laser to eliminate residual stress and avoid cracks.…”

Section: Preparation Of Materialsmentioning

confidence: 99%

Microstructure and Properties of TiAl Composite Coatings Prepared by Laser Cladding under Multi-Phase β0/CoAl2Ti Phase Strengthening

Zhu

Song

et al. 2022

Coatings

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Ceramic-reinforced TiAl matrix composite coatings are fabricated by laser cladding on Ti-6Al-4V (TC4) surfaces. The present work focuses on matching of the ceramic phase with the TiAl matrix to achieve a strength–toughness matching through the multi-scale multi-phase structure. The results indicated that the structure of composites coatings, including γ, α2, β0, CoAl2Ti, and TiC phases, significantly improved the properties of the composite coatings. The TiAl composite coating reached a maximum hardness of 741.17 Hv0.2, and the 10 at% tungsten carbide (10 WC) coating has the lowest wear volume of 8.8 × 107 μm3, the friction performance was approximate five times that of TC4. Detailed explanation of the friction properties and friction mechanism of the composite coating based on crystallographic orientation relationships and nanoindentation results. The study found that strength–toughness matching is important for the improvement of friction performance. Based on the TiAl alloy generated in the non-equilibrium solidification state in this paper, the solidification process and microstructure evolution are analyzed in detail.

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The evolution of multi and hierarchical carbides and their collaborative wear-resisting effects in CoCrNi/WC composite coatings via laser cladding

Cited by 11 publications

References 43 publications

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Effect of WC on Microstructure and Wear Resistance of Fe-Based Coating Fabricated by Laser Cladding

Wear‐Resistance of High‐Entropy Alloy Coatings and High‐Entropy Alloy‐Based Composite Coatings Prepared by the Laser Cladding Technology: A Review

Microstructure and Properties of TiAl Composite Coatings Prepared by Laser Cladding under Multi-Phase β0/CoAl2Ti Phase Strengthening

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