Page 16 - НАЦІОНАЛЬНА АКАДЕМІЯ НАУК УКРАЇНИ

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After analyzing the results of the studies, we ranked the methods of surface

hardening of the aluminum alloy B95, compared with unmodified one, by the level of

wear during testing under various conditions, corrosion resistance, energy

consumption, and environmental safety. It was found that a more efficient way than

galvanic chromium plating to reduce the wear of parts made of B95 alloy under

friction conditions with a fixed abrasive is an environmentally friendly is laser

modificating with SiC particles, which increases the wear resistance of an unmodified

alloy by 93 times. When testing with non-fixed abrasive, it is more expedient to use

high-speed gas-flame spraying of VC coatings, which increases the wear resistance of

an aluminum alloy by 7–9 times. Therefore, the replacement of the proposed ways to

strengthen the environmentally dangerous chromium plating process is quite justified

and its effect is undeniable.

Technological instructions for the restoration of shoofly-pies for offset printing

machines by spraying coatings with a high-speed flame method using powder

compositions of the FeCr-VC and FeCr-VC Со systems for the printing industry have

been developed. The technological instruction defines the basic technological

operations for the restoration or protection of new shoofly-pies of offset flat printing
machines from abrasive wear.

An experiment-industrial examination of printing machines with reconditioned
shoofly-pies at several printing companies in Lviv (Elgraf, Premier Group, Express)

over 2 years showed an increase of their resource by 1.5...2 times.

Keywords: aluminum alloy, laser-modified layers, carbide silicon, running

heat, high-pressure gasoline, carbide vanadium, cobalt inclusions, hard-pressed or

rigidly fixed abrasive, non-fixed or non-closed abrasive, wear resistance, corrosion

resistance.