Abrasive Wear of Powder Materials and Coatings

Abstract

Abrasive wear resistance of composite powder materials and coatings depends on various factors: on the one hand, on the technological parameters of the production, structure and properties of materials and coatings; on the other hand, on testing and exploitation conditions. Based on the information available on the abrasive wear of the materials and coatings, mostly from the laboratory tests, it is shown that hardmetals and different hardmetal-type coatings and composition behave differently under different conditions of wear. To compare the abrasive wear resistance of powder materials and coatings determined in the case of different abrasive wear conditions, tests of materials and coatings to be studied were carried out at low-speed abrasion wear (2 – 3 m/s) and high-speed erosion wear (up to 80 m/s) conditions. The wear resistance with the same abrasive – quartz sand and with different test equipment was determined. The difference in wear resistance using different low-speed abrasion methods of studied coatings is small, but in the case of hardmetals and cermets it differs up to ten times; using high-speed erosion methods the wear resistance of materials and coatings is comparable. At impact wear was revealed the superiority of hardmetal.