The Influence of Disc Surface Topography after Vapor Blasting on Wear of Sliding Pairs under Dry Sliding Conditions

Dzierwa Dzierwa,Pawlus Pawlus,Zelasko Zelasko

doi:10.3390/coatings10020102

Dzierwa Dzierwa, Pawlus Pawlus + Show 1 more

Open Access

https://doi.org/10.3390/coatings10020102

Copy DOI

Journal: Coatings	Publication Date: Jan 23, 2020
Citations: 14	License type: CC BY 4.0

Affiliation: Rzeszów University of Technology

Abstract

Wear tests were performed using a ball-on-disc tribological tester. In this study, 42CrMo4 steel disc of hardness 40 HRC co-acted with 100Cr6 steel ball with hardness of 60 HRC. Disc surfaces were created using vapor blasting to obtain values of the Sq parameter close to 5 µm. However, other disc surface topography parameters varied. Dry friction tests were carried out. Wear levels of discs and balls were measured using a white light interferometer Talysurf CCI Lite. It was found that the surface topography had a significant impact on tribological properties under dry sliding conditions. The research also allowed to identify significant dependencies between surface topography parameters and wear.

Highlights

The surface topography is one of the most important factors determining the quality of a surface layer
Despite the fact that a significant number of works have been made in the field of relationships between surface texture and tribological parameters, dependencies between surface topography parameters and friction and wear are not yet clearly defined [2,3,4,5,6]
The aim of this study is to investigate the effect of the disc surface texture after vapor blasting on tribological properties of a disc–ball assembly under dry friction conditions

Summary

Introduction

The surface topography is one of the most important factors determining the quality of a surface layer. It defines a set of all overlapping irregularities of surface resulting from the machining processes and wear of materials. The results of the ball-on-disc studies presented in papers [9,10] indicate the existence of a correlation between surface topography parameters (in particular Rsk and Rku) and the friction force. The Rsk parameter (skewness of the assessed profile) is the third order moment. It characterizes symmetry of the height distribution

Objectives

Methods

Results

Conclusion