Effect of induction remelting on the microstructure and properties of in situ TiN-reinforced NiCrBSi composite coatings

Chen, Jingbai; Yao, Dong; Lining, Wan; Yang, Yong; Chu, Zhenhua; Zhang, Jianxin; He, Jining; Li, Dongyang

doi:10.1016/j.surfcoat.2018.02.024

Cited by 41 publications

(15 citation statements)

References 28 publications

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“…Some of these imperfections can be eliminated by appropriately adjusting process parameters. However, previous tests revealed that, in most cases, the elimination of porosity, combined with a simultaneous increase in hardness, accordance with [14,15] can only be achieved using the laser beam [18,19], electron beam [20,21], electric arc [22] or induction heating-based [23] remelting of the layer.…”

Section: Imperfections In Thermally Sprayed Layerssupporting

confidence: 70%

Induction and Electric Arc-Based Remelting of Thermally Sprayed Layers – Overview

Węglowski¹,

Jachym²,

Krasnowski³

et al. 2021

EBIS

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In many cases, the technology enabling the melting of thermally sprayed layers has no alternative. High-performance thermal spraying processes make it possible to obtain densely sprayed layers. However, previous research revealed that sprayed layers are characterised by porosity and numerous material imperfections. The above-named situation results from the specific manner of layer application. The article overviews induction and arc-based technologies enabling the melting of sprayed layers as well as discusses possible post-spray imperfections.

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Section: Imperfections In Thermally Sprayed Layerssupporting

confidence: 70%

Induction and Electric Arc-Based Remelting of Thermally Sprayed Layers – Overview

Węglowski¹,

Jachym²,

Krasnowski³

et al. 2021

EBIS

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show abstract

“…The completely melted Ti powder reacted in situ with nitrogen, and the resulting TiN/TiN 0.3 nucleated and grew in the rich-Ni matrix during the spraying process. Therefore, the TiN/TiN 0.3 was composed of nanosized crystal grains, which was explained in detail in our previous work [24,29]. However, WC particles exhibited a semimelted or unmelted state in the composite coating due to their high melting point, so that the WC retained its original micron-scale morphology.…”

Section: Resultsmentioning

confidence: 89%

“…The interface bonding state between the TiN and Ni-rich phase was very good and no cracks were observed. This is due to the fact that TiN is in a fully molten state during spraying and freezes together with NiCrBSi alloy powders, which is in molten state, too, promoting bonding with NiCrBSi alloy substrates [24]. This will also increase the strength of the coating while increasing the wear resistance.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Microstructure and Properties of In-Situ TiN- and WC-Reinforced NiCrBSi Composite Coatings Prepared by Plasma Spraying

et al. 2018

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In this study, NiCrBSi-30 wt.% TiN composite (NTC) coating was produced on carbon steel via plasma spraying, with NiCrBSi-30 wt.% WC composite (NWC) coating as the comparison object. The microstructure and phase constituents of the composite coatings were characterized using scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) techniques, transmission electron microscopy (TEM) and x-ray diffraction (XRD). Atomic force microscopy (AFM) was used to measure electronic work functions. The microhardness and wear performance of coatings were also investigated. The average microhardness of the NTC and NWC coatings was 1000 HV and 850 HV, respectively. In addition, the NTC coating had a wear volume loss of 0.8118 mm3, less than 1.4772 mm3, the volume loss of the NWC coating. This was due to the presence of TiN in the form of nanograins in the composite coating and tighter binding to the matrix.

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“…Nb-1.75 at.% Cr-0.87 at.% Ni. Due to the dissolving of Nb in Ti, Ti x Nb 1-x O 2 will be formed by the means of the replacing of Ti 4+ ions in TiO 2 by Nb 5+ ions [30,31]. Compared with the oxidation film of Ti6Al4V alloy, that of the composite coatings is more compact.…”

Section: High Temperature Oxidationmentioning

confidence: 99%

Microstructure Features and High Temperature Oxidation Resistance of In-Situ TiN-Ti Composite Coatings by Plasma Transferred Arc Welding

et al. 2020

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In order to improve the high temperature oxidation resistance of Ti6Al4V alloy, the in-situ TiN-Ti composite coatings were prepared with Ti-Cr-Ni-Nb powders by plasma transferred arc welding. Nitrogen gas was used as the transport gas and provided N source for the formation reaction of TiN. Microstructure features and high temperature oxidation behaviors of the composite coatings were studied. The phases in the composite coatings were TiN, Ti, CrN, and NiTi. It was clearly observed that in-situ TiN particles were evenly distributed in the Ti matrix. A little Nb atom dissolved in TiN particles, and others dissolved in the Ti matrix. By comparing the curve of Ti6Al4V alloy to that of the composite coatings, the oxidation mass gain of the composite coatings was comparatively less. The oxidation film of the composite coatings was smooth and compact, and no crack was visibly observed. Based on the results of the high temperature tests, the composite coatings exhibited superior high temperature oxidation resistance than Ti6Al4V alloy both at 650 °C and at 850 °C.

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Effect of induction remelting on the microstructure and properties of in situ TiN-reinforced NiCrBSi composite coatings

Cited by 41 publications

References 28 publications

Induction and Electric Arc-Based Remelting of Thermally Sprayed Layers – Overview

Induction and Electric Arc-Based Remelting of Thermally Sprayed Layers – Overview

Comparison of Microstructure and Properties of In-Situ TiN- and WC-Reinforced NiCrBSi Composite Coatings Prepared by Plasma Spraying

Microstructure Features and High Temperature Oxidation Resistance of In-Situ TiN-Ti Composite Coatings by Plasma Transferred Arc Welding

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