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Wednesday, May 17, 2006 - 1:50 PM
APP9.1

Thermal Sprayed Coatings in High-Performance Agricultural Machinery: Properties and Wear Behavior

M. Lugbauer, A. Kröll, Busatis Austria, Purgstall, Austria; E. Badisch, F. Franek, R. Polak, AC˛T Research, Wr. Neustadt, Austria

Cutting tools in agricultural machines have to withstand high wear demands. Longer maintenance cycle intervals of this tools can be achieved using coatings reinforced with hard particles, applied on tool substrates. The aim of this study is the development of coating composition performing optimised wear behaviour for real field specification. Simulating these field conditions in lab-scale, tests were performed with a standard ASTM G65 dry-sand rubber-wheel tester (3-body abrasion) and a special impeller-tumbler apparatus (combined impact and abrasion wear). The influence of hardphase and matrix composition was investigated, respectively, impact energy effects of hitting abrasive particles on the surface. The Analysis had been carried out quantitatively by gravimetric mass loss measurement, as well as qualitatively by characterization of worn surface using scanning electron microscopy (SEM) and optical surface profilometry (edge stability, wear mechanisms).


Summary: Cutting tools in agricultural machines have to withstand high wear demands. Longer maintenance cycle intervals of this tools can be achieved using coatings reinforced with hard particles, applied on tool substrates. The aim of this study is the development of coating composition performing optimised wear behaviour for real field specification.