METHOD FOR PRODUCING MULTILAYER HIGH-ENTROPY COMPOSITE COATINGS Russian patent published in 2021 - IPC C23C28/02 C23C4/06 C23C4/10 C23C4/129 

FIELD: chemical and thermal treatment of metal products.

SUBSTANCE: invention relates to the field of metal science, chemical and thermal treatment of metal products, creation of materials for construction purposes, problem of friction and wear and can be used to increase durability of machine parts in any industry. The method for producing a multilayer high-entropy composite coating from steel-based powder materials includes chemical etching, sandblasting of the steel base and applying high-speed flame spraying layers of high-entropy flame coating. The lower binding layer is applied to steel base made of mechanically activated Ni powder. The middle high-entropy layer is made of mechanically activated TiNiZrHfCoCu powder with shape memory effect, the following composition, wt. %: Ti 9,7, Ni 11,9, Zr 18,3, Hf 35,8, Co 11,7, Cu 12,6. The upper wear-resistant layer is made of a mechanically activated mixture of cBN-Co-Mo powders, at their ratio, mass.%: cBN 85-90, Co 4-6, Mo 6-9. After applying the middle layer of TiNiZrHfCoCu with shape memory effect, its surface plastic deformation is carried out when heated by an amount of 5-8% of the layer thickness. Mechanical activation of the mentioned powders and high-speed flame spraying of these layers are carried out in protective atmosphere. The resulting composite coating is annealed.

EFFECT: increase in strength characteristics and wear resistance of composite materials is provided.

9 cl, 1 tbl, 1 ex