| Autors: T. Penyashki., G. Kostadinov., D. Radev., Kandeva, M. K. Title: Comparative Studies of Tribological Characteristics of Carbon Steels with Gas Flame Coatings from New Multi-component Carbide Composite Materials Keywords: Gas Flame Spraying; (WC, B4C, TiB2); wear resistance coating Abstract: A new type of wear-resistant and high-hard composite coatings with a complex structure and different phase composition have been obtained and studied in the present work by gas-fuel spraying on carbon steels. The choice of powder compositions is made in order to maximize the adhesion and wear resistance of the resulting coatings, and hence the operating lifetime of the contact surfaces in terms of resistance to abrasion. For this purpose, are selected conventional composite powders - semi-self fluxing alloys based on Ni-Cr-Co-B-Si to which tungsten carbide alloys BK8 have been added, and ultrahard phases - WC, TiB2, B4C and others both individually and in combinations with each other in different ratios. The wear of the coatings under conditions of dry friction is investigated. It has been found that new composite coatings have repeatedly reduced the wear of the coated surfaces. References Issue
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Вид: публикация в международен форум, публикация в издание с импакт фактор, индексирана в Scopus
