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

EFFICIENT DETERMINATION OF STABILITY LOBE DIAGRAMS DEPLOYING AN AUTOMATED, DATA-BASED ONLINE NC PROGRAM ADAPTION

CHRISTIAN BRECHER, RALPH KLIMASCHKA, ALEXANDER STEINERT, STEPHAN NEUS
Keywords: Stability lobe diagrams | regenerative chatter | online chatter detection | Poincaré section

QUALIMETRIC METHOD OF ASSESSING RISKS OF LOW QUALITY PRODUCTS

ROMAN TRISHCH, OLESIA NECHUIVITER, KOSTIANTYN DYADYURA, OLEKSANDR VASILEVSKYI, IRYNA TSYKHANOVSKA, MAKSYM YAKOVLEV
Keywords: qualimetry | risk assessment | risk of low quality | summarizing indicator | multicriteria quality assessment | dimensionless scale.

EVALUATION OF PHYSICAL BURDENS OF OPERATORS USING ERGONOMICS

PETRA MARKOVA, VANESSA PRAJOVA
Keywords: work | work activity | load | difficulties | Ergonomics | work performance | employee

IDENTIFICATION OF CHARACTER AND INTENSITY OF WEAR OF PVD COATED TWIST DRILLS IN DRILLING OF C 45 MATERIAL

MARIAN HARSANI, MATEJ MIKLOS, IVAN MORGOS
Keywords: hard coatings | PVD technology | drills | flank wear | C45