Abstract
Detonation spraying is one of the most promising variants of thermal spraying for the deposition of wear-resistant coatings. This study aims to investigate the tribological properties of coatings deposited by the detonation method using WC-12%Co and Al2O3 as examples. These are two common coating materials widely used in wear resistant applications. A computerized detonation spraying system CCDS2000 (Computer-Controlled Detonation Spraying) was used for coating deposition. The roughness parameter of the WC-Co coating has a value of Ra = 3.95 μm and that of the Al2O3 coating has a value of Ra = 2.53 μm. To investigate the detonation coatings, the coating materials were characterized and microhardness measurements were carried out. Microhardness for stainless steel 12Х18Н10Т (AISI 321, 321H) – 392.32 Hv; for WC-12Co coating – 1332.3 Hv and Al2O3 – 805.50 Hv. By results of researches the greatest resistance to all kinds of wear has coatings WC-12%Co. Al2O3 coatings can also be recommended for operation under sliding wear conditions.
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