TRIBOLOGICAL PROPERTIES OF AL-ALLOY DESIGNED FOR DRAWING STAMPINGS IN AUTOMOTIVE INDUSTRY

Abstract

Strict legislative requirements for environmental protection and tendency to lower consumption of fossil fuels force the car producers to still find new possibilities in the car-body design. As one of such possibilities there is effort to apply materials with low specific weight. Among these belong also Al-alloys that are affordable, but in comparison to steels also difficult to be technologically processed. In paper is evaluated the influence of new coating type on the tribological properties of alloy EN AW 6016 that is used in the automotive industry for drawing stampings. Tribological properties are evaluated by means of 3D surface color maps, where is shown friction coefficient in dependence on sliding velocity and contact pressure. Own state of surface is observed and documented by images from the optical microscope and magnitudes of surface sheet roughness that are measured in parallel and perpendicular direction regarding the rolling direction.

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