METHOD OF PRODUCING A WEAR-RESISTANT NANOSTRUCTURED COATING Russian patent published in 2021 - IPC B82B3/00 C23C14/34 C23C14/02 C23C14/06 C23C14/58 B82Y40/00 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of applying nanostructured and wear-resistant coatings from high-entropy alloys with thermoelastic phase transformations by magnetron-plasma sputtering. Part surface is etched with low-temperature argon plasma at pressure 150-250 Pa for 5-10 minutes. Then, target surface is cleaned consisting of high-entropy FeNiCoAlX alloy, where X is impurity alloying or dopant component in form of Ti, Ta, Nb, Cr or W. Target contains components at following ratio, wt.%: Fe - 41-43, Ni - 28-30, Co - 15-17, Al - 10-11.5, X - 2-2.5. Upper layer of the target is sprayed on flap for 1-2 minutes at a plasma current of 150-200 mA with voltage of 370-420 V. Flap is then removed. Ion-plasma spraying of coating on part with thickness of 500-700 nm is performed at pressure of 1.5-2.5 Pa, plasma current is 110-130 mA and voltage is 350-450. Further, phase-forming thermal annealing is carried out in an inert atmosphere of argon at temperature of 573-773 K for 40-80 minutes.

EFFECT: technical result is higher resistance to abrasive, hydroabrasive and cavitation wear, and resistance to fatigue cracking coating at operating temperatures below 273 K.

1 cl, 1 tbl, 15 ex, 3 dwg