Научный доклад ID 2759 : 2025/3

The aim of the present work is to establish a technologically optimal mode of heat treatment and hard anodizing for a suitable deformable aluminum alloy, in order to guarantee achieving a high-quality anode film.

It was found that after heat treatment, aluminum alloy B95 has the highest core hardness and minimal deformation, but the surface hardness and the thickness of the anode layer are the lowest of the studied alloys. In thick-layer anodizing of aluminum alloy AD31, anode layer with the greatest thickness and surface hardness is obtained. After thick-layer anodizing of aluminum alloy АD31 at I = 4.5 A/dm for 90 min, the maximum thickness of 110µm and surface hardness of 445НV of the anode layer are obtained. With increasing the content of the alloying components Cu, Mg and Si, the thickness and microhardness of the anode layer decrease.

The most highly alloyed aluminum alloy В95 turns out to be with the lowest physical and mechanical parameters of its anode-oxide layer (60 µm thickness and 302HV0.1 microhardness) after thick-layer anodizing, which is due to the faster anode dissolution of the intermetallic compounds in it, compared to aluminum.

It was proved that during the process of heat treatment of aluminum alloys В 95, AB, АD31, АD35, the cooling media significantly affect their hardness and degree of deformation. The most favorable cooling medium for the studied aluminum alloys is water with a temperature of 80° С, at which the least deformation and relatively high hardness are obtained.