Improving the technology of preparation of the Al-Mg system alloy used in aircraft constructions

In present article the improved and developed new technologies, methods and means used by manufacturing the moulded pieces and aircraft constructions made of АМг10ч alloy are described. In connection with containing magnesium in АМг10ч alloy, a whole series of problems are arised by preparation and founding the alloy because of inclination this element to oxidation and inclination the alloy to gasing that leads to worsening the quality of cast wares. The following actions were developed and put into practice to avoid the alloy from interaction with atmosphere and moisture of sand: 1) inserting the boric acid into the sand; 2) degassing of aluminum-zirconium and aluminum-titanium ligatures; 3) the optimal order of melting the burden materials was elaborated; 4) the high-temperature treatment of liquid alloy is used and 5) filtration of alloy by the pouring-in casting-form with using the 6) device of thermal pipe type, provided fast temperature reducing of superheated alloy. All these measures, taken separately as well as in complex provide obtaining the moulded pieces of АМг10ч alloy with necessary and improved mechanical properties. At that the reproducibility of the mechanical properties of moulded pieces of different fusions tests results is marked.