Improvement in Tribological Properties of Cr12MoV Cold Work Die Steel by HVOF Sprayed WC-CoCr Cermet Coatings

Hong, Sheng; Wu, Yifei; Wang, Bo; Lin, Junjie

doi:10.3390/coatings9120825

Cited by 16 publications

(5 citation statements)

References 46 publications

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“…In Figure 3 b,d, the hard particles are homogeneously distributed in the cobalt matrix, whereas for C3 ( Figure 3 f), there are some areas of nickel matrix islands without hard particles. This is similar to the phenomenon reported by [ 26 , 27 , 28 ].…”

Section: Resultssupporting

confidence: 92%

Microstructure Investigation of WC-Based Coatings Prepared by HVOF onto AZ31 Substrate

et al. 2021

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In this paper, three commercial cermet powders, WC-Co-Cr, WC-Co and WC-Cr3C2-Ni, were sprayed by the High Velocity Oxy Fuel (HVOF) method onto magnesium alloy AZ31 substrate. The coatings were investigated in terms of their microstructure, phase analysis and residual stress. The manufactured coatings were analyzed extensively using optical microscopy (OM), X-ray diffraction (XRD), scanning (SEM) and transmission electron microscopy (TEM). Based on microstructure studies, it was noted that the coatings show satisfactory homogeneity. XRD analysis shows that in WC-Co, WC-Co-Cr and WC-Cr3C2-Ni coatings, main peaks are related to WC. Weaker peaks such as W2C, Co0.9W0.1, Co and W for WC-Co and W2C, Cr3C2 and Cr7C3 for WC-Cr3C2-Ni also occur. In all cermet coatings, linear stress showed compressive nature. In WC-Co and WC-Cr3C2-Ni, residual stress had a similar value, while in WC-Co-Cr, linear stress was lower. It was also proved that spraying onto magnesium substrate causes shear stress in the WC phase, most likely due to the low elastic modulus of magnesium alloy substrate.

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Section: Resultssupporting

confidence: 92%

Microstructure Investigation of WC-Based Coatings Prepared by HVOF onto AZ31 Substrate

et al. 2021

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“…The microstructure observation on SEM images was carried out at low (500x) and high (10,000x) magnification. In Figure 4, it can be seen that coatings exhibit dense, compact and uniform structure that is typical for the HVOF process [38,39]. Moreover, at the interface the tightly adhering coating can be seen.…”

Section: Coating Morphologies and Microstructuresmentioning

confidence: 88%

Comparative analysis of microstructure and selected properties of WC-Co-Cr coatings sprayed by high-velocity oxy fuel on S235 and AZ31 substrates

Jonda,

Myalska-Głowacka,

Łatka

et al. 2024

Materials Science-Poland

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The purpose of this work was to carry out comparative studies of WC-Co-Cr coatings deposited using the high velocity oxy fuel (HVOF) method onto two types of substrate material: structural steel S235 and magnesium alloy AZ31. The influence of the substrate material type on the microstructure, phase composition, crystallite size, porosity, Vickers microhardness, instrumental hardness (HIT), Young’s modulus (EIT), and fracture toughness was investigated. For both substrates, the deposited coatings deposited were characterized with fine-grained and compact microstructure. The X-ray diffraction (XRD) revealed presence of following phases: WC, W2C, Co0.9W0.1, and Co3W9C4. The WC phase was the most desirable and stable one with crystallites were below 100 nm. On the other hand, the size of the W2C crystallites was below 30 nm. The coatings obtained showed porosity values equal to 2.3 ± 0.4 vol% and 2.8 ± 0.7 vol% for AZ31 and S235, respectively. The average Vickers microhardness for both types of sample was appproximately 1200 HV0.3. The average HIT values for carbide particles and metallic matrix were around 29 GPa and 6.5 GPa, respectively. In the case of EIT, it was around 620 GPa and 190 GPa for WC and Co-Cr, respectively. The differences between coatings were negligible. The EIT value for both coatings was equal to 344 ± 11 GPa. The fracture toughness was around 4.5 MPa · m1/2 in both cases. The investigations revealed that it is possible to replace steel substrate material with a much lighter equivalent, in this case AZ31 alloy, without deterioration of the coating properties.

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“…A minor drawback of AISI 1045 is that, unlike other medium carbon steels, it does not sustain complete hardening except for short parts of up to 60 mm. Surface treatment technologies have been the subject of extensive investigation for decades for AISI 1045 to enhance mechanical properties by thermal spray coating [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16],plasma arc cladding [17],electron beam cladding [18],tungsten inert gas arc cladding [19 22], laser beam cladding [23][24][25][26][27] and other surface modification methods.In order to apply the required coating, the HVOF process employs a mix of heat and kinetic energy to melt and accelerate powder particles. In the production of coatings, combustion and gas dynamics are crucial.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review of Coating on AISI 1045 Steel Substrate by High Velocity Oxygen Fuel (HVOF)

Alam

Das

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Coating of surface is a cost-effective way to make materials, equipment, and machine components with desired surface characteristics including high hardness, resistance against erosion, wear and corrosion. To obtain the necessary characteristics, several coatings are employed. The surface characteristic of the AISI1045 steel is not optimum, despite its desired strength, resistance against wear, hardness or corrosion. Thermal spraying is currently a leading way in which materials are avoided for days to wear abrasively, corrosion at high temperatures, erosive wear and stress because of increased material life in use. Spraying using high-velocity oxygen fuel (HVOF) is a kind of thermal spraying noted for its resistance against wear, micro-hardness and thick micro structured coatings. The aim of this review paper is to provide a state-of-the-art about the research done by various scholars to improve physical, mechanical, wear, erosion and corrosion characteristics of AISI 1045 by the application of different or combination of coating powders utilising the HVOF Spray method.

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Improvement in Tribological Properties of Cr12MoV Cold Work Die Steel by HVOF Sprayed WC-CoCr Cermet Coatings

Cited by 16 publications

References 46 publications

Microstructure Investigation of WC-Based Coatings Prepared by HVOF onto AZ31 Substrate

Microstructure Investigation of WC-Based Coatings Prepared by HVOF onto AZ31 Substrate

Comparative analysis of microstructure and selected properties of WC-Co-Cr coatings sprayed by high-velocity oxy fuel on S235 and AZ31 substrates

A Critical Review of Coating on AISI 1045 Steel Substrate by High Velocity Oxygen Fuel (HVOF)

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