25-27 April 2022
Conventum Conference Center
Europe/Vienna timezone

Dry sliding tribological behaviour of cryotreated Cr-V ledeburitic tool steel against CuSn6 counterpart

26 Apr 2022, 15:00
20m
Room 2

Room 2

Oral Presentation Microstructure, properties & performance Microstructure, Properties & Performance

Speaker

Venu Yarasu (Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava.)

Description

The purpose of this study is to assess the impact of different combinations of cryogenic treatments and tempering regimes on tribological properties of Cr-V tool steel against a CuSn6 counterpart. Dry sliding wear experiments were performed using a pin-on-disk tribometer according to the Taguchi method. Tribological behaviour is investigated under four process parameters at mixed levels: cryotemperature (-75, -140, or -196°C), tempering temperature (170 or 530°C), sliding velocity (0.064, 0.128, 0.1885 m/s), and load (1, 5, 10N). According to the analysis, the minimum friction coefficient is obtained by cryotreatment at -196°C combined with 170°C tempering, with a sliding velocity of 0.064 m/s and load 5N. For the minimum counterpart´s material adhesion level, cryogenic treatment at -196°C followed by tempering at 530°C, sliding velocity of 0.1885 m/s, and applied load of 1 N are the optimum settings. The ANOVA model shows that the sliding velocity (45.2%), load (40.2%), and tempering temperature (5.3%) have statistical significance on the friction coefficient, while the load (57.8%) and tempering temperature (16.4%) have statistical significance on adhesion levels. The tribological behaviour of the steel is explained by thorough microstructural examinations using the scanning electron microscopy and microanalysis, X-ray diffraction, and transmission electron microscopy.

Speaker Country Slovakia

Primary author

Venu Yarasu (Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava.)

Co-authors

Prof. Jakub Hornik (Czech Technical University in Prague) Prof. Peter Jurci (Slovak University of Technology, Faculty of Materials Technology based in Trnava)

Presentation Materials

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