THE INFLUENCE OF A UNIT LOAD ON THE STATIC FRICTION COEFFICIENT VALUE OF SELECTED METAL– –POLYMER FRICTION PAIRS
Journal Title: Tribologia - Year 2014, Vol 256, Issue 4
Abstract
The main goal of the experiments was to determine the value of a static friction coefficient for particular friction pairs. Each friction couple consists of a plastic sample and a steel countersample. Pairs of materials that were chosen for the tests are ones most frequently used for friction nodes in machine design and many another branches of industry. Understanding and ability to influence the value of COF allow the reduction of energy losses and the design of more robust products. This article contains the results of studies and the description of a static friction coefficient μ0 testing procedure. The selected plastics were PEEK, PEEK BG, PA 6, PE-UHMW, POM, POM + 40GF, POM + 10% PTFE, PTFE, PTFE +40% Bronze, PET and PSU (as a group of materials commonly used for bearings, guides and gaskets etc.); and during the investigations, they rubbed together with steels C45, Hardox 500, and AISI 316L. Each test consists in an induction of reciprocating movement between the friction pair pin-plate-type. The experiment assumed that the value of a steel element surface roughness and the rest time between the cycles are constant. Characteristics describing the dependence between the static friction coefficient and the unit pressure (of range 0.1 – 3.0 MPa) were prepared for all selected rubbing pairs. The results clearly indicate a meaningful influence of unit pressure on the value of static COF.
Authors and Affiliations
Anna DOBROWOLSKA, Piotr KOWALEWSKI, Anita PTAK
Keywords
Related Articles
- EP ID EP262200
- DOI -
- Views 58
- Downloads 0
DISSIPATION AND ACCUMULATION OF ENERGY AS FACTORS CONDITIONING STABILITY OF FRICTIONAL COUPLES
Wear and stability of frictional couples are presented as a function of dissipation and accumulation of energy. Such couples are treated as open thermodynamic systems and processes occurring in them are described on the...
CHANGES IN THE CHEMICAL COMPOSITION OF A STEEL SURFACE DURING FRICTION
The primary objective of this work was to investigate the chemical composition of the sliding surfaces during tribological tests with the participation of lubricants based on mineral oil SAE 30/95 and selected AW/EP addi...
TRIBOLOGICAL PROPERTIES OF ALUMINIUM OXIDE LAYER MODIFIED BY CARBON
The article presents the tribological and stereometric properties of aluminium oxide layers modified by carbon. The coatings were produced on EN-AW-5251 aluminium alloy substrate using a two-stage technology. The matrix...
ANALYSIS OF MICROMECHANICAL AND TRIBOLOGICAL PROPERTIES OF nc-WC/a-C AND nc-WC/a-C:H NANOCOMPOSITE COATINGS
In the article, micromechanical and tribological properties of nanocomposite coatings nc-WC/a-C and nc-WC/a-C: H were presented. Coatings were deposited by magnetron sputtering on baseline and oxigen-hardened Ti6Al4V tit...
THE SELECTION OF PRELOAD IN ANGULAR CONTACT BALL BEARINGS ACCORDING TO THE CRITERION OF MOMENT OF FRICTION
The article [L. 3] presents a method of preload selection in angular contact ball bearings based on their durability. The preload can be expressed as a force or as a dislocation (distance). Depending on the regulation me...