EFFECT OF THE NITRIDED LAYER ON THE PERFORMANCE OF COATINGS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F25%3A00564097" target="_blank" >RIV/60162694:G43__/25:00564097 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

EFFECT OF THE NITRIDED LAYER ON THE PERFORMANCE OF COATINGS

Original language description

The surfaces of highly stressed machine and vehicle components are exposed to variety of adverse conditions including for example friction and wear, corrosion, vibration, dynamic impacts or cyclic loading. Their surface treatment is therefore necessary to pay attention to. For this reason a wide range of surface technology comprising chemical-heat treatment, PVD (Physical Vapour Deposition) or CVD (Chemical Vapour Deposition) coatings and many more, have been developed. This paper discusses the possibility of improving the properties of PVD coatings by their combination with supporting diffusion layers formed by chemical-heat treatment to form so-called duplex coatings. For manufacturing of experimental samples the steel equivalent to 100CrMn6, which is typical for highly stressed components such as bearings, cams or ball screws, was selected. The samples were subjected to either heat treatmetment or chemical-heat treatment by utilizing plasma nitriding. Subsequently, the CrN coating created by PVD upon experimental samples surfaces was deposited. The chemical composition of the selected steel was verified by optical emission spectrometer Tasman Q4 Bruker. The assessment of the core microstructure, microstructure of the diffusion nitrided layer as well as observation of the imprints of the indentation tests was performed with Opto-digital microscope Olympus DSX500i. The surface morphology was observed with scanning electron microscope TESCAN MIRA 4. The Nitrdiding hardness depth (NHD) was measured according to standard ISO 18203:2016 with automated microhardness tester LM247 AT LECO. The adhesion of the coatings was assessed by utilizing two methods i.e. Rockwell-C indentation test defined by ISO 26443 and Scratch test according to ASTM C1624-05 was performed on Universal tribometer Bruker UMT-3 TriboLab. The comparison of results obtained by measuring of heat treated and coated samples with those where the support layer under coating were made by plasma nitriding revealed, that a presence of the diffusion layer has undoubtedly positive impact upon performance of the selected coating.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20300 - Mechanical engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

VRSTVY A POVLAKY 2024 COATINGS AND LAYERS 2024

ISBN

978-80-972133-7-4

ISSN

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e-ISSN

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Number of pages

1

Pages from-to

55

Publisher name

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Place of publication

Rožnov pod Radhoštěm

Event location

Rožnov pod Radhoštěm

Event date

Nov 4, 2024

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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