Effect of Ti content on the microstructure and mechanical properties of laser clad Ti/B4C/dr40-based composite coatings on shaft parts surface

Yu, Jinsu; Ho, Hsinshen; Chen, Jiangyi

doi:10.1016/j.ceramint.2022.01.234

Cited by 11 publications

(4 citation statements)

References 28 publications

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“…The COFs versus sliding time curves of substrate and WC−10Co4Cr coatings fabricated at different laser power are demonstrated in Figure 10(A), in which there were running−in and stable wear periods 31 . The COF curve of substrate was fluctuated caused by the wear of WC particle and CoCr binder throughout the wear test, which was attributed to the formation of discontinuous friction layer in the friction process and uneven surface roughness 32,33 . The sharp fluctuations of COFs in the running−in period were because the coatings were worn away, which produced wear debris between the coatings and tribo−pairs.…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

“…31 The COF curve of substrate was fluctuated caused by the wear of WC particle and CoCr binder throughout the wear test, which was attributed to the formation of discontinuous friction layer in the friction process and uneven surface roughness. 32,33 The sharp fluctuations of COFs in the running−in period were because the coatings were worn away, which produced wear debris between the coatings and tribo−pairs. At the same time, the tribo-pairs were fluctuated up and down, and the COF curves were also fluctuated greatly.…”

Section: Cofs and Wear Ratesmentioning

confidence: 99%

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Effect of laser power on microstructure and tribological performance of WC−10Co4Cr coating

Zhicheng

Jiangzheng

He³

et al. 2023

Int J Applied Ceramic Tech

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In order to enhance wear resistance of cold work molds, WC−10Co4Cr coating was fabricated on Cr12MoV steel by laser cladding. The morphologies, chemical compositions, and phases of obtained coatings were analyzed using a scanning electron microscopy (SEM), energy disperse spectroscopy, and X−ray diffraction, respectively. The effect of laser power on the tribological performance was analyzed using a ball−on−plate friction machine, and the wear mechanism was also discussed. The results show that the WC−10Co4Cr coating is composed of WC and Co6W6C phases, and the average hardness of coating cross−sections fabricated at the laser power of 1200, 1500, and 1800 W was 1296, 1375, and 1262 HV0.5, respectively, in which that fabricated at the laser power of 1500 W is the highest among the three kinds of coatings. The average coefficients of friction of coatings fabricated at the laser power of 1200, 1500, and 1800 W are 0.61, 0.52, and 0.59, respectively; and the corresponding wear rates are 64.38, 35.38, and 123.92 μm3•N−1•mm−1, respectively, showing that the coating fabricated at the laser power of 1500 W has best friction reduction and wear resistance. The wear mechanism of WC−10Co4Cr coating is fatigue wear and abrasive wear, which is contributed to the increase of hard WC mass fraction.

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Section: Results Analysis and Discussionmentioning

confidence: 99%

Section: Cofs and Wear Ratesmentioning

confidence: 99%

Effect of laser power on microstructure and tribological performance of WC−10Co4Cr coating

Zhicheng

Jiangzheng

He³

et al. 2023

Int J Applied Ceramic Tech

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“…Results revealed that the multiphase ceramics played the load-bearing and load-transfer role and develop the wear resistance of the composite coating. Furthermore, a Ti/B4C/dr40 composite powder was cladded by laser cladding to improve the microhardness and wear resistance of a shaft part [32]. The presence of the reinforcements (carbides and borides) enhanced the deformation resistance of the coating.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Multi-Ceramic Aluminium-Matrix Composite Coating by Direct Laser Deposition

Al-Hamdani,

Al-Thamir,

Sahi

et al. 2023

SSP

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Using of metal matrix composite coating is a promising approach for improving the surface properties of a component against the mechanical and environmental attacks especially wear and corrosion. Laser cladding (LC), also known as direct energy deposition (DED), is an additive manufacturing (AM) technique, able to perform coating, repair worn parts, manufacturing and prototyping. In this work, pure Al and a mixture of multi-ceramic Al-15SiC-15Al2O3 coatings were successfully deposited on Al-based substrate. The quality of the deposited clads was evaluated according to macro-graphic, microstructure, and microhardness characteristics. The microscopic inspection of the multi-ceramic coatings showed a slight dilution of SiC particles. Also, XRD investigation revealed a formation of Al4C3 carbide. Besides SiC and Al2O3 hard phases, this yielded an increase in matrix microhardness about 180% (from 75 to 212 Hv0.05) as compared to pure Al clads, indicating a great improvement in the mechanical properties of the composite cladded coating.

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“…In recent years, with the boom in laser additive manufacturing (AM) technology, laser cladding has become a leading technology because it can be employed to improve the hardness, wear resistance, and corrosion resistance of metal parts [13][14][15]. Compared with the traditional surface strengthening technology, the coating fabricated by laser cladding has the advantages of a low dilution rate, good metallurgical bond performance, and controllable microstructure and mechanical properties [16,17]. As a kind of composite material, metal-matrix composites provide both the wear resistance of ceramics and the toughness of matrix.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of (Ti, Nb)C Ceramic-Reinforced 316L Stainless Steel Coating by Laser Cladding

2022

Applied Sciences

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The poor wear resistance of 316L stainless steel restricts further practical application. In this study, to improve its microhardness and wear resistance, the TiC and NbC ceramic particles were introduced to 316L powder fabricate (Ti, Nb)C ceramics-reinforced composite coatings by laser cladding. The effects of ceramics addition on the phase composition, microstructure, microhardness, and wear properties of the composite coating were investigated with an X-ray diffractometer, optical microscopy, scanning electron microscopy, a Vickers hardness tester, and a multi-functional surface performance tester. Results indicate that the TiC and NbC ceramic particles were distributed at the grain boundaries, effectively inhibiting the grain growth and refining the microstructure. The addition of ceramic particles could have decreased the temperature gradient and promoted the transformation from columnar crystals to equiaxed crystals. In addition, the microhardness was improved due to fine grain strengthening and solid solution strengthening. The friction coefficient and cross-sectional area of the composite coating were 0.381 and 8164.732 μm2, which was 0.846 and 0.603 times that of the 316L coating, respectively. Moreover, severe adhesive wear and plastic deformation was transformed into slight adhesive wear and abrasive wear due to the addition of TiC and NbC particles. This study provides new approaches to improving the wear resistance of 316L stainless steel and broadens its application.

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Effect of Ti content on the microstructure and mechanical properties of laser clad Ti/B4C/dr40-based composite coatings on shaft parts surface

Cited by 11 publications

References 28 publications

Effect of laser power on microstructure and tribological performance of WC−10Co4Cr coating

Effect of laser power on microstructure and tribological performance of WC−10Co4Cr coating

Deposition of Multi-Ceramic Aluminium-Matrix Composite Coating by Direct Laser Deposition

Microstructure and Mechanical Properties of (Ti, Nb)C Ceramic-Reinforced 316L Stainless Steel Coating by Laser Cladding

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