Theoretical and practical aspects of creation of wear-resistant coatings on machine parts by high-speed flame spraying

The essence of the high-speed flame spraying method has been revealed, its main advantages over subsonic flame spraying have been shown. The analysis of theoretical and practical aspects of the use of high-speed flame spraying to create wear-resistant coatings on machine parts for various functional purposes was carried out. It is established that the high-speed method is implemented mainly for agglomerated sintered metal-carbide powders, where the metal can be an alloy of nickel or cobalt, and the carbide is chromium or tungsten carbides. These powder materials are used in engineering as an alternative to electroplated chrome coatings and make it possible to form dense wear-resistant coatings with a hardness of 800-1400 HV. The method can also be recommended for spraying pure metal powders. The expediency of using supersonic spraying to restore the geometric dimensions of worn-out machine parts of various nomenclature is substantiated.