RESEARCH PAPER
Friction Evaluation of Laser Textured Tool Steel Surfaces
1
Slovak University of Technology, Faculty of Material Science and Technology, Institute of Production Technologies, J. Bottu 25, 917 24 Trnava, Slovakia
Submission date: 2015-11-02
Acceptance date: 2017-05-17
Online publication date: 2017-06-15
Publication date: 2017-06-01
Acta Mechanica et Automatica 2017;11(2):129-134
KEYWORDS
ABSTRACT
Surface textures can be defined as a regularly arranged micro-depressions or grooves with defined shape and dimensions. These textures, if they are manufactured by laser ablation process, contribute to a significant improvement of the tribological, optical or various biological properties. The aim of this paper is to analyze the influence of the surface textures prepared by laser surface texturing (LST) at the friction coefficient value measured on the tool (90MnCrV8 steel) – workpiece (S235JRG1 steel) interface. Planar frontal surfaces of compression platens have been covered by parabolic dimple-like depressions with different dimensions. The morphological analysis of such manufactured depressions has been performed by laser scanning microscopy. Influence of such created textures on the tribological properties of the contact pair has been analyzed by the ring compression test method in the terms of hydrodynamic lubrication regime. The experimental research shown that by applying of surface textures with defined shape and dimensions and using an appropriate liquid lubricant at the same time, the coefficient of contact friction can be reduced nearly to the half of its original value.
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| eISSN: | 2300-5319 |
| ISSN: | 1898-4088 |
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