Publication detail

Change in Dimensions and Surface Roughness of 42CrMo4 Steel after Nitridation in Plasma and Gas

DOBROCKÝ, D. POKORNÝ, Z. JOSKA, Z. SEDLÁK, J. ZOUHAR, J. MAJERÍK, J. STUDENÝ, Z. PROCHÁZKA, J. BARÉNYI, I.

Original Title

Change in Dimensions and Surface Roughness of 42CrMo4 Steel after Nitridation in Plasma and Gas

Type

journal article in Web of Science

Language

English

Original Abstract

The influence of plasma nitriding and gas nitriding processes on the change of surface roughness and dimensional accuracy of 42CrMo4 steel was investigated in this paper. Both processes almost always led to changes in the surface texture. After plasma nitriding, clusters of nitride ions were formed on the surface of steel, while gas nitriding very often led to the new creation of a formation of a “plate-like” surface texture. In both cases of these processes, a compound layer in specific thickness was formed, although the parameters of the processes were chosen with the aim of suppressing it. After the optimizing of nitriding parameters during nitriding processes, it was found that there were no changes in the surface roughness evaluated using the Ra parameter. However, it turned out that when using a multi-parameter evaluation of roughness (the parameters Rz, Rsk and Rku were used), there were presented some changes in roughness due to nitriding processes, which affect the functional behavior of the components. Roughness changes were also detected by evaluating surface roughness profiles, where nitriding led to changes in peak heights and valley depths. Nitriding processes further led to changes in dimensions in the form of an increase of 0.032 mm on average. However, the magnitude of the change has some context on chemical composition of material. A larger increase in dimensions was found with gas nitriding. The change in the degree of IT accuracy is closely related to the change in dimension. For both processes, there was a change of one degree of IT accuracy compared to the ground part (from IT8 to IT9). On the basis of the achieved dimensional accuracy results, a coefficient of change in the degree of accuracy IT was created, which can be used to predict changes in the dimensional accuracy of ground surfaces after nitriding processes in degrees of accuracy IT3–IT10. In this study, a tool for predicting changes in degrees of accuracy of ground parts after nitriding processes is presented.

Keywords

plasma nitriding; gas nitriding; dimensional accuracy; roughness; functional properties

Authors

DOBROCKÝ, D.; POKORNÝ, Z.; JOSKA, Z.; SEDLÁK, J.; ZOUHAR, J.; MAJERÍK, J.; STUDENÝ, Z.; PROCHÁZKA, J.; BARÉNYI, I.

Released

6. 10. 2022

Publisher

MDPI

Location

Basel, Switzerland

ISBN

2079-6412

Periodical

Coatings, MDPI

Year of study

12

Number

10

State

Swiss Confederation

Pages count

19

URL

https://www.mdpi.com/2079-6412/12/10/1481

Full text in the Digital Library

http://hdl.handle.net/11012/208674

BibTex

@article{BUT179602,
  author="David {Dobrocký} and Zdeněk {Pokorný} and Zdeněk {Joska} and Josef {Sedlák} and Jan {Zouhar} and Jozef {Majerík} and Zbyněk {Studený} and Jiří {Procházka} and Igor {Barényi}",
  title="Change in Dimensions and Surface Roughness of 42CrMo4 Steel after Nitridation in Plasma and Gas",
  journal="Coatings, MDPI",
  year="2022",
  volume="12",
  number="10",
  pages="19",
  doi="10.3390/coatings12101481",
  issn="2079-6412",
  url="https://www.mdpi.com/2079-6412/12/10/1481"
}