INCREASING OF WEAR RESISTANCE OF LINEAR BLOCK-POLYURETHANES BY THERMAL PROCESSING METHODS

  • 1Technical University of Kosice, Department of Automotive and Manufacturing Technologies, Faculty of Manufacturing Technologies with a seat in Presov, Presov, SK
  • 2Ukrainian State Chemical Technology University, Ministry of Education and Science of Ukraine, Dnipro, UA
  • 3Sumy State University, Ministry of Education and Scieence of Ukraine, Sumy, UA

Abstract

A significant imperfection of parts made from linear blockpolyurethanes under conditions of friction contact in the presence of water medium is an intensification of hydrolysis processes and reduction of bulk strength. In order to slow down the hydrolysis process, samples of the polyurethanes were subjected to three types of thermal impacts: thermal processing during some time, infrared and laser irradiations. It has been established that processing in thermal fields of different intensity allows 5-10 times increase of wear resistance of these materials during friction in water medium.

Recommended articles

EFFECTS OF DIFFERENT EXCITATION MECHANISMS IN MACHINE TOOLS WHEN PERFORMING OUTPUT-ONLY MODAL ANALYSIS

MARTIN KOLOUCH, JOACHIM REGEL, JAN BERTHOLD, MARTIN DIX
Keywords: Output-only Modal Analysis | Machine tool | dynamic behaviour | excitation mechanism | white noise