Effect of WC particles preparation method on microstructure and properties of laser cladded Ni60-WC coatings

Ren, Ming-Qiang; Li, Ruifeng; Zhang, Xiaoqiang; Gu, Jiayang; Chen, Jiao

doi:10.1016/j.jmrt.2022.11.120

Cited by 35 publications

(9 citation statements)

References 28 publications

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“…In this work, the temperature suffered from the powder during the L-DED process and exceeded the melting point of Co (1495 • C), thus resulting in the dissolution of WC into the Co phase and leading to a C loss. This loss of C caused the transformation of WC carbides into the η-phase, as similarly reported in [18,50].…”

Section: Microstructural Investigation Of the Sample In The As-built ...supporting

confidence: 69%

Effect of Post-Fabrication Heat Treatments on the Microstructure of WC-12Co Direct Energy Depositions

Morales,

Fortini,

Soffritti

et al. 2023

Coatings

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Laser-Directed Energy Deposition (L-DED) is an additive manufacturing technique that has lately been employed to deposit coatings of cemented carbides, such as WC-Co. During deposition, complex microstructural phenomena usually occur, strongly affecting the microstructural and mechanical behavior of the coatings. Post-fabrication heat treatments (PFHTs) may be applied to homogenize and strengthen the microstructure; nevertheless, to the best of the authors’ knowledge, just a few papers deepened the effect of these treatments on cemented carbides fabricated by additive manufacturing. This work evaluates the influence of four PFHTs on the microstructural evolution and hardness of L-DED WC-12Co. For each treatment, different combinations of solubilization time and temperature (between 30 and 180 min and from 400 °C to 700 °C, respectively) were adopted. The microstructure was investigated by optical and scanning electron microscopy equipped with energy-dispersive spectroscopy, whereas the mechanical properties were determined by Vickers hardness measurements. Based on the results, high microstructural heterogeneity in terms of WC particles, η-phase structures, and Co distribution was observed in the sample in the as-built condition. Some cracking defects were also observed in the samples, irrespective of the heat treatment conditions. Finally, a finer microstructure and a lower amount of brittle ternary η-phase, together with an increase in hardness (1030 ± 95 HV10), were found for the highest dwelling times (180 min) and for solubilization temperatures in the range of 500–600 °C.

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Section: Microstructural Investigation Of the Sample In The As-built ...supporting

confidence: 69%

Effect of Post-Fabrication Heat Treatments on the Microstructure of WC-12Co Direct Energy Depositions

Morales,

Fortini,

Soffritti

et al. 2023

Coatings

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“…Furthermore, the heightened surface hardness observed in sample S3 can be attributed to two primary factors: Firstly, Figure 3(a4) reveals a higher presence of unmelted WC particles in the middle and lower sections of the coating, contributing to enhanced coating hardness [16,17]. Secondly, the increase in WC content leads to the decomposition of WC into W and C atoms, subsequently dissolved within the matrix, thereby enhancing the solid solution strengthening effect [27,28]. Cracks are evident in the magnified area of Figure 5d.…”

Section: Hardness Analysismentioning

confidence: 97%

Effect of CeO2 Content on Microstructure and Wear Resistance of Laser-Cladded Ni-Based Composite Coating

Zhang,

Shi,

Lin

et al. 2024

Lubricants

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In order to improve the wear resistance of 45 steel, in this study, WC/Ni60 composite coatings with different CeO2 additions (0, 1, 2, and 3 wt%) were prepared on 45 steel by the laser cladding technique; the experimental analysis was carried out by means of scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), a Vickers hardness tester, and a friction and wear tester. The results show that CeO2 had little effect on the phase composition of the coatings; however, with the increase in CeO2 content, the CeO2 played a key role in refining the grains of the coating, thus reducing the generation of cracks. In addition, CeO2 could effectively strengthen the internal structure of the coating and improve its microhardness and wear resistance. Particularly noteworthy is the observed reduction in both the friction coefficient and mass loss of the coating when the CeO2 addition reached 2%. This suggests an enhancement in the tribological performance of the coating at this concentration.

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“…In addition the preparation method of WC has a significant effect on the micro-morphology and mechanical properties of Ni/WCcoatings. Ren et al [ 19 ] prepared WC particles with 30 % Ni/WC composite coatings by agglomeration-sintering and sintering-crushing methods respectively. It showed that WC prepared by agglomeration-sintering could better enhance the microhardness and wear resistance of the coatings.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties analysis of Ni60-based/WC composite coatings prepared by laser cladding

jiang,

Zhikai,

Wenqing

et al. 2024

Heliyon

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Effect of WC particles preparation method on microstructure and properties of laser cladded Ni60-WC coatings

Cited by 35 publications

References 28 publications

Effect of Post-Fabrication Heat Treatments on the Microstructure of WC-12Co Direct Energy Depositions

Effect of Post-Fabrication Heat Treatments on the Microstructure of WC-12Co Direct Energy Depositions

Effect of CeO2 Content on Microstructure and Wear Resistance of Laser-Cladded Ni-Based Composite Coating

Microstructure and properties analysis of Ni60-based/WC composite coatings prepared by laser cladding

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