Resource-saving technologies of forming process for casting superalloys

Ceramic corundum molds on hydrolysed ethyl silicate solution which have insufficient inertness to poured alloys are widely used in the production of castings from reactive metals alloys. This is due to the presence of high amount of free silica, which is a strong oxidant of such alloy components as aluminium and titanium in vacuum conditions. To solve the indicated problem it was suggested to use aluminium-borophosphate concentrate, chemically cured with periclase, as a silica free binder of ceramic corundum molds. The use of the combination of the indicated mold materials allows not only to enable chemical inertness of the molds, but to operate the process of mold forming. Developed technology provides the acceleration of the mold manufacturing cycle 4...6 times, an increase of the strength of the mold covers, and reduction of the superalloys casting cost. It enables significant improvement of the quality and increases the economic efficiency of manufacturing of precision casting from reactive metals and alloys.