Microstructure and wear resistance of Stellite-6/WC MMC coatings produced by laser cladding using Yb:YAG disk laser

Bartkowski, Dariusz; Kinal, Grzegorz

doi:10.1016/j.ijrmhm.2016.04.017

Cited by 70 publications

(23 citation statements)

References 48 publications

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“…However, because pure Co powder is expensive, it is more often considered as an additive element in alloy powders to improve the performance of the cladding layer [29][30][31]. Gao et al [32] researched the effect of the addition of Co on the microstructure and interfacial bonding properties when steels were laser cladded with iron-based powders.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cobalt on Microstructure and Wear Resistance of Ni-Based Alloy Coating Fabricated by Laser Cladding

Wang

Chang

Liu

et al. 2017

Metals

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Abstract:Ni-based alloy powders with different contents of cobalt (Co) have been deposited on a 42CrMo steel substrate surface using a fiber laser. The effects of Co content on the microstructure, composition, hardness, and wear properties of the claddings were studied by scanning electron microscopy (SEM), an electron probe microanalyzer (EPMA), X-ray diffraction (XRD), a hardness tester, and a wear tester. The results show that the phases in the cladding layers are mainly γ, M 7 (C, B) 3 , M 23 (C, B) 6 , and M 2 B. With the increase in Co content, the amounts of M 7 (C, B) 3 , M 23 (C, B) 6 , and M 2 B gradually decrease, and the width of the eutectic structure in the cladding layer also gradually decreases. The microhardness decreases but the wear resistance of the cladding layer gradually improves with the increase of Co content. The wear resistance of the NiCo30 cladding layer is 3.6 times that of the NiCo00 cladding layer. With the increase of Co content, the wear mechanism of the cladding layer is changed from abrasive wear to adhesive wear.

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Section: Introductionmentioning

confidence: 99%

Effect of Cobalt on Microstructure and Wear Resistance of Ni-Based Alloy Coating Fabricated by Laser Cladding

Wang

Chang

Liu

et al. 2017

Metals

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“…Increasing of wear and corrosion resistance, as well as reduction the brittleness of boronized layers can be obtained by modification of these layers using chromium [1,6,7], nickel [8][9][10], and copper [6]. To achieve this purpose, the diffusion methods [1,6,8]; laser methods (e.g., laser hardening [11][12][13], laser remelting [4,7,14], laser alloying [15][16][17], laser cladding [18][19][20][21]); as well as the electroplating [8][9][10] or thermal spraying methods [22] can be applied. Laser remelting of boronized layers allows changes in their microstructure and properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, chemical composition, wear, and corrosion resistance of FeB–Fe2B–Fe3B surface layers produced on Vanadis-6 steel using CO2 laser

Bartkowska

Bartkowski

Swadźba

et al. 2017

Int J Adv Manuf Technol

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The paper presents the study results of laser modification of FeB-Fe 2 B surface layers produced on Vanadis-6 steel using pack cementation method. Microstructure, x-ray phase analysis, chemical composition study using wave dispersive spectrometry method, microhardness, corrosion resistance as well as surface condition, roughness, and wear resistance were investigated. The diffusion boronizing processes were performed at 900°C for 5 h in the EKabor® powder mixture. The boronized layers had a dual-phase microstructure composed of two types of iron borides, FeB and Fe 2 B, and their microhardness ranged from 1800 to 1400 HV. The laser surface modification was carried out on specimens after diffusion boronizing process using CO 2 laser with a nominal power of 2600 W. Laser beam power used in this experiment was equal to 1040 W and was constant. While the three values of scanning speed were used: 19, 48, and 75 mm/s. During laser modification, the multiple tracks were made where distance between of axis tracks was equal to 0.5 mm. As a result of this process, microstructure consisted of remelted zone, heat-affected zone, and substrate was obtained. In remelted zone, the boron-martensite eutectic was observed. Boronized layers after laser modification were characterized by the mild gradient of microhardness from surface to the substrate and their value was dependent on the scanning speed used and was between 1700 and 1100 HV. Corrosion resistance tests revealed reducing the current of corrosion in case of laser modification process. Wear resistance of laser modified specimens was improved in comparison to diffusion boronized layers.

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“…Dimensions of the counterspecimen were 45 mm in diameter and thickness equal to 12 mm, with mounting hole of diameter equal to 15 mm. In this study load was equal to F = 392 N and rotational speed of the counterspecimen n = 180 rev./min, just like at paper [ 32 ]. Some droplets of water were delivered to the friction zone to make the friction coefficient lower.…”

Section: Methodsmentioning

confidence: 99%

Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400

et al. 2020

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In this study, wear properties of Monel 400 after laser alloying with boron are described. Surfaces were prepared by covering them with boron paste layers of two different thicknesses (100 µm and 200 μm) and re-melting using diode laser. Laser beam power density was equal to 178.3 kW/cm2. Two laser beam scanning velocities were chosen for the process: 5 m/min and 50 m/min. Surfaces alloyed with boron were investigated in terms of wear resistance, and the surface of untreated Monel 400 was examined for comparison. Wear tests were performed using counterspecimen made from steel 100Cr6 and water as a lubricant. Both quantitative and qualitative analysis of surfaces after wear test are described in this paper. Additionally, microstructures and properties of obtained laser alloyed surfaces are presented. It was found that the wear resistance increased from four to tens of times, depending on parameters of the laser boriding process. The wear mechanism was mainly adhesive for surfaces alloyed with initial boron layer 100 µm thick and evolves to abrasive with increasing boron content and laser beam scanning velocity. Iron particles detached from counterspecimens were detected on each borided surface after the wear test, and it was found that the harder the surface the less built-ups are present. Moreover, adhered iron particles oxidized during the wear test.

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Microstructure and wear resistance of Stellite-6/WC MMC coatings produced by laser cladding using Yb:YAG disk laser

Cited by 70 publications

References 48 publications

Effect of Cobalt on Microstructure and Wear Resistance of Ni-Based Alloy Coating Fabricated by Laser Cladding

Effect of Cobalt on Microstructure and Wear Resistance of Ni-Based Alloy Coating Fabricated by Laser Cladding

Microstructure, chemical composition, wear, and corrosion resistance of FeB–Fe2B–Fe3B surface layers produced on Vanadis-6 steel using CO2 laser

Influence of Microstructure and Chemical Composition on Microhardness and Wear Properties of Laser Borided Monel 400

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