Wear resistance of WC/Co HVOF-coatings and galvanic Cr coatings modified by diamond nanoparticles

Kandeva, M. K.; Grozdanova, Tsvetinka; Karastoyanov, Dimitar; Assenova, Emilia

doi:10.1088/1757-899x/174/1/012060

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…Ignoring the importance of certain properties of the hob milling tool materials is one of the main reasons for the lack of understanding of the main functions of the layer's stability on the hob milling tool. There are more than one hundred different methods of surface coating of metals and alloys, by which it is possible to increase the efficiency of the tool to a certain extent [16][17][18][19][20][21][22]. An overview of basic techniques and surface engineering (surface modification and application of a layer) is shown in Fig.…”

Section: Gear Cutting and The Topography Of The Surfacementioning

confidence: 99%

Tribological researches of triboelements topography of hob milling process of cylindrical gear serration

Sovilj¹,

Sovilj-Nikić²,

Javorova

2019

MATEC Web Conf.

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Hob milling process is one of the most important links in the chain of machining because productivity, final geometrical accuracy and gear cutting are very dependent on it. The quality of the machining of gear serration is one of the conditions for achieving the required quality of the work-piece. In this paper the methodology for the identification of topography of tool teeth and gear serration produced by uncoated and coated model and real hob milling tool is presented. 6MATEC Web of Conferences 287, 05003 (2019)

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Section: Gear Cutting and The Topography Of The Surfacementioning

confidence: 99%

Tribological researches of triboelements topography of hob milling process of cylindrical gear serration

Sovilj¹,

Sovilj-Nikić²,

Javorova

2019

MATEC Web Conf.

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“…It is of special importance for the high wear resistance of tribology materials to combine high hardness and plasticity, which are mutually self-excluding aspects and they cannot be achieved by most of the conventional tribology technologies [11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Influence of Chromium Concentration on the Abrasive Wear of Ni-Cr-B-Si Coatings Applied by Supersonic Flame Jet (HVOF)

Kandeva

Kalitchin²,

Stoyanova

2021

Metals

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This research work studies the characteristics of wear and wear resistance of composite powder coatings, deposited by supersonic flame jet (HVOF), which contain composite mixtures Ni-Cr-B-Si having different chromium concentrations—9.9%, 13.2%, 14%, 16%, and 20%, at one and the same size of the particles and the same content of the remaining elements. The coating of 20% Cr does not contain B and Si. Out of each powder composite, coatings have been prepared without any preliminary thermal treatment of the substrate and with preliminary thermal treatment of the substrate up to 650 °C. The coatings have been tested under identical conditions of dry friction over a surface of solid, firmly-attached, abrasive particles using tribological testing device “Pin-on-disk”. Results have been obtained and the dependences of the hardness, mass wear, intensity of the wearing process, and absolute and relative wear resistance on the Cr concentration under identical conditions of friction. It has been found out that for all the coatings the preliminary thermal treatment of the substrate leads to a decrease in the wear intensity. Upon increasing Cr concentration the wear intensity diminishes and it reaches minimal values at 16% Cr. In the case of coatings having 20% Cr concentration, the wear intensity is increased, which is due to the absence of the components B and Si in the composite mixture, whereupon no inter-metallic structures are formed having high hardness and wear resistance. The obtained results have no analogues in the current literature and they have not been published by the authors.

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“…The problem of abrasive and erosive wear resistance of tribological materials is of exceptional importance and actuality, which is evidenced by the fact that there exist 17 active standards ASTM, concerning the abrasive wear and at least 4 standards connected with the erosion wear. www.videleaf.com It is of special importance for the high wear resistance of tribology materials to combine high hardness and plasticity, which are mutually self-excluding aspects and they cannot be achieved by most of the conventional tribology technologies [11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Influence of Chromium Concentration on the Abrasive Wear of Ni-Cr-B-Si Coatings Applied by Supersonic Flame Jet (HVOF)

Kandeva¹,

Kalitchin²,

Stoyanova³

2021

Prime Archives in Material Science

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Wear resistance of WC/Co HVOF-coatings and galvanic Cr coatings modified by diamond nanoparticles

Cited by 7 publications

References 1 publication

Tribological researches of triboelements topography of hob milling process of cylindrical gear serration

Tribological researches of triboelements topography of hob milling process of cylindrical gear serration

Influence of Chromium Concentration on the Abrasive Wear of Ni-Cr-B-Si Coatings Applied by Supersonic Flame Jet (HVOF)

Influence of Chromium Concentration on the Abrasive Wear of Ni-Cr-B-Si Coatings Applied by Supersonic Flame Jet (HVOF)

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