Publication detail

Possibilities of Using the Duplex System Plasma Nitriding plus CrN Coating for Special Components

DOBROCKY, D., POKORNY, Z., VITEK, R., PROCHAZKA, J., STUDENY, Z., JOSKA, Z., SEDLAK, J., SLANY, M., KOLOMY, S.

Original Title

Possibilities of Using the Duplex System Plasma Nitriding plus CrN Coating for Special Components

Type

journal article in Web of Science

Language

English

Original Abstract

The article deals with the replacement of hard chrome plating by applying the duplex system plasma nitriding + CrN coating (hereinafter referred to as PN + CrN). The goal of the research was to find a suitable alternative for steel surface treatment that would replace hard chrome plating and ensure similar mechanical and tribological properties. An exposed part of a small-bore weapon was selected for evaluation, namely the gas piston of the 42CrMo4 steel breech mechanism drive. The PN + CrN duplex system was compared with a hard chrome coating as well as a self-deposited CrN coating. The mentioned surface treatments were evaluated in terms of metallography, mechanical and tribological properties and surface texture. From the mechanical properties, the hardness of the surface was analyzed, an indentation test was performed (Mercedes test) and adhesive-cohesive behavior was evaluated (Scratch test). Furthermore, an instrumented penetration test was performed (an evaluation of plastic and elastic deformation work and indentation hardness). As part of the assessment of tribological properties, the Ball-on-Flat test, the measurement of the coefficient of friction and the measurement of traces of wear were performed. The surface texture was evaluated in terms of morphology and surface roughness measurement by selected 2D and 3D parameters. The PN + CrN duplex system showed higher hardness than hard chrome, better tribological properties (lower friction coefficient), but worse surface texture. The PN + CrN duplex system has proven to be a suitable alternative to the hard chrome coating for exposed parts of small-caliber weapons, which can be applied in arms production.

Keywords

plasma nitriding, hard chrome, CrN, duplex system, weapon

Authors

DOBROCKY, D., POKORNY, Z., VITEK, R., PROCHAZKA, J., STUDENY, Z., JOSKA, Z., SEDLAK, J., SLANY, M., KOLOMY, S.

Released

12. 12. 2022

Publisher

MDPI

Location

Basel, Switzerland

ISBN

2079-6412

Periodical

Coatings, MDPI

Year of study

12

Number

12

State

Swiss Confederation

Pages from

1

Pages to

20

Pages count

20

URL

https://www.mdpi.com/2079-6412/12/12/1953

BibTex

@article{BUT179615,
  author="Josef {Sedlák} and Martin {Slaný} and Štěpán {Kolomý}",
  title="Possibilities of Using the Duplex System Plasma Nitriding plus CrN Coating for Special Components",
  journal="Coatings, MDPI",
  year="2022",
  volume="12",
  number="12",
  pages="1--20",
  doi="10.3390/coatings12121953",
  issn="2079-6412",
  url="https://www.mdpi.com/2079-6412/12/12/1953"
}