The filtration of aluminum alloys used in constructions of aircrafts

Aluminum alloys used in aerospacemachine-building are divided into two classes - casting, which the components of complicated geometry (eg. frame cases of aviation free-piston engines and turbo-pump assemblies of liquid-propellant rocket engines) are made from, and deformable,which the ingots are casted of, afterwards the plates are made by rolling for fuel tanks made by welding and also frames, stringers, longerons, power frames made by pressing. By preparation the alloys of both groups, in essence, the identical technologies reduced to two main - degassing (moving hydrogen off) and modification (decomposition of structure) are used. However, the products of interaction between fining and modifying substances and fluid metal often remain in liquid. And it makes the quality of molded articles worse. The results of investigations for the refinement of metallic liquids from these products by filtration during ingots casting by semicontinuos method and so during details casting are demonstrated in this work.