HAJDUGA Maciej University of Bielsko-Biala

Spoluautoři JEDRZEJCZYK Dariusz

The paper presents the examinations of yarn guide made of steel 50 HS, subjected to different types of treatment: heat, thermo-chemical and surface: hardening and tempering; plasma spraying with Al2O3 powder; titanizing and chromium plating. Yarn guides were tested in industrial conditions, and next subjected to laboratory examinations: microscopic - optical and scanning microscope; RTG analysis; hardness measurements. The surface topography and the corrosion resistance were also evaluated. Examinations showed that yarn guides after plasma spraying with Al2O3 powder reveal the greatest durability - after 12000 working hours there is practically no wear traces at the guiding surface.