The study of the structure and properties of a wear-resistant gas-thermal coating containing tungsten

The paper presents the results of reverse engineering including metallographic, mechanical, and engineering-technical studies used rods a compressor produced by Dresser-Rand company (Siemens, Germany). study established that original product is made AISI 4140 steel with working coating based on tungsten carbide applied to depth 0.2 mm HVOF method. contains development an import-substituting technological process for producing wear-resistant powder Ni–Cr–B–WC system cold gas flame spraying surface critical unit equipment in oil industry. Microanalysis identified sprayed spherical WC particles are evenly distributed nickel bond without formation free cavities at lamella boundary, retain size identical composition upon high-speed collision substrate, minimize level residual mechanical stresses layer. shows has high microhardness (the bases – 700 HV0.1, up 2000 HV0.1), which ensures wear resistance during operation rod friction pair. A comparative analysis tribological properties coatings showed when changing shape, particle distribution, percentage ratio from 20 70 % matrix, overall equivalently increases. authors concluded possibility manufacturing using technology metallurgical compositions containing tungsten. developed industrial applying steel. stress state material comparison product. In obtained experimental technology, its subsequent processing, uniform formed do not exceed value difference principal stresses. both standard samples pilot part.