Abrasion resistance of Ni-Cr-B-Si coating deposited by laser cladding process

Sousa, Jurandir; Ratusznei, Francisco; Pereira, Milton; Castro, Richard de Medeiros; Curi, Elvys Isaías Mercado

doi:10.1016/j.triboint.2019.106002

Cited by 47 publications

(37 citation statements)

References 24 publications

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“…With the dilution of the coating on the substrate, there was a change in microhardness values under the cross section of the samples; De Sousa et al [28] evidence the same behavior in his study. Microhardness starts with high values in the samples with parameters 1 and 2 (higher than the without remelting coating) due to the high cooling rate that the laser process offers as indicated in the literature [11,21,28]. With the increase in microhardness, it can be emphasized that the surface of a workpiece (remelted layer) is even more resistant to wear [19,28].…”

Section: Discussionmentioning

confidence: 53%

“…Microhardness starts with high values in the samples with parameters 1 and 2 (higher than the without remelting coating) due to the high cooling rate that the laser process offers as indicated in the literature [11,21,28]. With the increase in microhardness, it can be emphasized that the surface of a workpiece (remelted layer) is even more resistant to wear [19,28].…”

Section: Discussionmentioning

confidence: 95%

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Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Panziera

Oliveira

Pereira

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The laser remelting technique is considered a promising and effective method for improving the surface of thermally sprayed coatings, eliminating microstructural defects such as pores and cracks, increasing the life of parts and equipment by increasing microhardness and increasing anchoring force between coating and substrate. In the present work, tungsten carbide alloy (WC-12Co-4Cr) coatings were deposited on properly prepared SAE 1016 substrates using the high velocity oxy-fuel technique. An ytterbium fiber laser was used to remelt the surface of the coating by accurately varying the scanning speed and laser beam power to achieve a pore and crack-free coating and better metallurgical anchorage to the substrate through the optimization of the studied parameters. The samples were characterized by scanning electron microscopy and microhardness. The results show that it is possible to obtain higher hardness coatings after the laser remelting process, free of pores or pronounced imperfections and metallurgically bonded to the substrate. We also found a processing range for the ytterbium laser remelting of the WC-12Co-4Cr coating aiming at high productivity and microstructural optimization of the coating for different thicknesses.

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 95%

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Panziera

Oliveira

Pereira

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…However, such coatings may generate, in several conditions, lack of metallurgical adhesion, extensive heat-affected zone (HAZ) and high dilution. These aspects are emphasized from well-established literature until more recent works (Toyserkani et al, 2005;Zhong and Liu, 2010;Davim, 2013;Houdková et al, 2014;D'Oliveira, 2015, 2016;Zhao et al, 2018;Sousa et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…LMD's advantages derive from the special laser radiation properties, which generates a highly directional beam, high maximal available power, versatility and high achievable energy density (Toyserkani et al, 2005). Ni-Cr-B-Si alloys, in their turn, it's an alloy class that's capable of simultaneously providing resistance to abrasive, adhesive and corrosive wear mechanisms D'Oliveira, 2015, 2016;Sousa et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Despite the advantages highlighted, NI-Cr-B-Si alloy coatings are highly susceptible to cooling cracks appearance (Houdková et al, 2014;Silva and D'Oliveira, 2016;Sousa et al, 2020). LMD deposition process and the laser remelting posttreatment surface have high parametrization complexity due to a large number of variables involved (Davim, 2013;Houdková et al, 2014;Marimuthu et al, 2015;Pôrto et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Laser Remelting on Tribological Performance of Ni-Cr-B-Si Coatings Deposited by Laser Metal Deposition

et al. 2020

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Ni-superalloys coatings deposited via laser metal deposition (LMD) have been known to perform well in increasing components lifespan and consequently reducing production and repair costs. Although most of these coatings already present good results in its hardness, and tribological behavior, some can be improved by post-deposition treatments, such as laser remelting. In this ambit, the present paper aims to evaluate the laser remelting posttreatment effects on the Ni-Cr-B-Si coating sliding tribological behavior. For this, two conditions were compared: Ni-Cr-B-Si coating as-deposited and Ni-Cr-B-Si coating as-deposited and remelted. The coating's occurrence of superficial macro defects, their microhardness, and tribological performance in the pin-on-disk (ASTM G99) test were compared. Friction coefficient (load cell), volumetric loss (optical interferometry), Archard's wear coefficient and worn surfaces (SEM and EDS), were evaluated. Results show that the laser remelting posttreatment was effective in reducing cooling cracks, increasing hardness and reducing friction coefficient oscillation and volumetric loss average.

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Microstructure and mechanical properties investigation of Ni35A–TiC composite coating deposited on AISI 1045 steel by laser cladding

Zhang

Lian

Cao

et al. 2021

Int J Adv Manuf Technol

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In this research, the TiC-Ni35A composite coating was fabricated on the AISI 1045 steel substrate by laser cladding process. The cross-sectional morphology, microstructure, micro-hardness, and wear resistance of coatings obtained under different laser energy densities (E) and TiC powder ratios (PR) were analyzed.According to the results, all the coating had a reliable metallurgical bonding with the AISI 1045 steel substrate. The X-ray diffraction (XRD) analysis revealed that the coating phases were Ni and TiC. The average microhardness of the Ni35A-80wt.% TiC coating reached up to 75.12 HRC. The minimum coe cient of friction of the composite coating was only about 30% of the AISI 1045 substrate. The wear form was mainly adhesive wear when altering the TiC powder ratios, while the wear form also contained abrasion wear under different energy densities. The ability of decomposition and re-nucleation of TiC was signi cantly improved with the increase of laser energy densities and the decrease of TiC powder ratios.The micro-hardness, wear resistance, and coe cient of friction of the composite coating were improved because of the TiC strengthening phase particles. Compared with the AISI 1045 steel substrate, the microhardness and wear resistance of the composite coating was increased by 5.29 times and 6.26 times, respectively.

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Abrasion resistance of Ni-Cr-B-Si coating deposited by laser cladding process

Cited by 47 publications

References 24 publications

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Study of the effects of the laser remelting process on the microstructure and properties of the WC–10Co–4Cr coating sprayed by HVOF

Effect of Laser Remelting on Tribological Performance of Ni-Cr-B-Si Coatings Deposited by Laser Metal Deposition

Microstructure and mechanical properties investigation of Ni35A–TiC composite coating deposited on AISI 1045 steel by laser cladding

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