Title: Wear and smearing resistance of black iron mixed oxide coated steels

Authors: A. Mihailidis, C. Salpistis, K. Panagiotidis, C. Sachanas, S. Gatsios, C. Hoffinger, V. Bakolas

Addresses: Laboratory of Machine Elements and Machine Design, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. ' Laboratory of Machine Elements and Machine Design, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. ' Laboratory of Machine Elements and Machine Design, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. ' Laboratory of Machine Elements and Machine Design, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. ' Laboratory of Machine Elements and Machine Design, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. ' Schaeffler Technologies GmbH & Co. KG, Application Engineering Wind Energy, Georg-Schafer-Strasse 30, 97421 Schweinfurt, Germany. ' Schaeffler Technologies GmbH & Co. KG, Corporate Basic Projects and Long Term Quality – Bearing Fundamentals, Industriestr. 1-3, Herzogenaurach, Germany

Abstract: Surface coatings increase the wear and smearing resistance of a machine element. Nevertheless, most of the coating processes are expensive and time-consuming. By contrast, Schaeffler|s Durotect® B coating seems attractive regarding production expenditure and price. However, the literature about the behaviour of this coating is very limited. This paper describes the experimental setup and the experiments that were carried out in order to evaluate the wear and smearing resistance of the Durotect® B coated 100Cr6 steel in reference to plain 100Cr6 through hardened steel. Durotect® B is a mixed black iron oxide coating developed by Schaeffler especially for use in machine elements. The main measured parameters (mass loss, smearing slide-to-roll ratio, friction and normal force, surface roughness and bulk temperature) are presented. Comparative charts of the monitored parameters are given and discussed. It is concluded that this coating decreases friction coefficient and improves both the smearing and wear resistance.

Keywords: black iron mixed oxide; Durotect B; bluing; friction coefficient; running-in; wear rate; smearing resistance; two discs test rig; solid contact time percentage; mixed lubrication; surface coatings; coated steels; machine elements; surface roughness.

DOI: 10.1504/IJSURFSE.2010.035140

International Journal of Surface Science and Engineering, 2010 Vol.4 No.4/5/6, pp.337 - 359

Published online: 09 Sep 2010 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article