THE RELATIONSHIP BETWEEN TRIBOLOGICAL PROPERTIES AND MICROSTRUCTURE OF 90CRV6 STEEL

1 FROCISZ Łukasz
Co-authors:
1 KRAWCZYK Janusz 1,2 BAŁA Piotr 1 MADEJ Marcin
Institutions:
1 AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Av. A. Mickiewicza 30 30-059 Krakow, e-mail address: lfrocisz@agh.edu.pl
2 AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
585-590
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
43 views / 5 downloads
Abstract

The wear resistance of the material and the wear mechanism are considered as the most important properties of tool materials. Changes in microstructures of tool materials may also results in the wear mechanism changes. Therefore, the aim of this study was to determine the relationship between microstructure and wear resistance of the hypereutectoid steel. Material used in investigations was 90CrV6 hypereutectoid steel. The material was heat treated on the basis of CCT diagram. After heat treatment the tribological tests were performed by the use of T-05 tribological test machine. Metallographic analysis of the microstructure and microanalysis of the wear surface for each samples after tribological test were performed. Analysis of the material microstructure and wear mechanism allowed define the relationship between the microstructure and wear resistance of the samples. For samples with pearlitic matrix the friction coefficient increased simultaneously with their hardness. Increase of the bainite volume fraction results in the decrease of average friction coefficient. The average friction coefficient changes were related with different wear mechanism for the bainitic microstructure. The wear area of samples with bainitic microstructure the microridging mechanism was observed. For the martensitic microstructure the wear was the biggest. The decrease of the wear resistance was probably related with the spalling of martensite.

Keywords: Sliding wear, wear mechanism, microstructure, phase transformation, tool materials

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Scroll to Top