Technology for producing aluminum alloys with ultradisperse intermetallic compounds and a high content of refractory transition and rare earth elements

Purpose. Selection of the composition of modifiers and optimal methods and modes for modifying aluminum melts in order to disperse the structure in cast products and increase their performance properties.

Specifications. The technology makes it possible to increase the mechanical and operational properties of cast products: tensile strength – by 10%, fluidity – by 18%, relative elongation – by 48%. The average grain size in continuously cast ingots is reduced by 3 times; in addition, the proposed technology increases the stability of the structure, which makes it possible to obtain high-quality metal products from non-ferrous alloys and new functionality.

Application area. Refers to metallurgy and foundry.

Advantages. Products made of non-ferrous alloys produced using the developed technology exceed known analogues in mechanical properties and performance characteristics.

Technical and economic effect. New technological solutions make it possible to extract metal products from non-ferrous alloys with a dispersed structure and improved performance characteristics, which helps reduce its cost.

Description. The main essence of the technology is the use of electron beam casting technology and isothermal pressing to produce modifiers based on aluminum with a high content of refractory and highly reactive metals, having modifying phases that are 20-100 times smaller in size compared to industrial alloys. Electron beam melting and isothermal pressing produced a rod alloy, as well as dispersed (0.07 mm) rapidly crystallized fibers extracted from the matrix melt to modify alloys during chill casting and in the crystallizer of a continuous casting machine. The use of such alloys made it possible to increase the ductility of cast semi-finished products and products from the V96Ts1 alloy by 40…60%. It has been established that after complex MHD plasma treatment of aluminum alloy B93, the mechanical properties of cast products increase: tensile strength – by 10%, fluidity – by 18%, relative elongation – by 48%. The average grain size in continuously cast ingots decreases by 3 times. After deep blowing of the melt with a plasma jet containing zinc vapor for 10 minutes, the grain size in the V96Ts1 alloy ingots decreases by 55%.

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