Research of the properties of experimental iron-aluminum alloys

Intermetallic iron-aluminium alloys are used mainly as wear- and corrosion-resistant coatings intended for use in chemically aggressive environments or at elevated temperatures. At the same time, the alloys are characterized by brittleness at normal temperatures, uneven structure and properties of the contact zone of the intermetallic material with the base. The paper presents the results of a study of the properties of experimental iron-aluminium alloys. The influence of the initial composition of thermite charges on the parameters of the aluminothermic remelting process, the properties of cast samples and their stress-strain state under uniaxial loading was analyzed. The methods of etching microsections of the alloys were determined depending on the aluminum content in them, which is 7.35 – 58.5 % wt. It was found that samples obtained from thermite charges with an active aluminum content of up to 45 % wt. have high resistance to compressive loads. The obtained results can be used to solve problems of processing technogenic formations (scale, non-ferrous metal shavings, etc.) and forming functional surfaces and cast products from them while maintaining operational characteristics under normal conditions.

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