Calcia overcoat coat inactive for the investment casting of aluminide alloys - titanium and titanium

摘要

(57) titanium and titanium template topcoat coat [Abstract] calcia - applied to a mold for casting a molded article made from reactive metals, such as aluminides. The topcoat coating consists of calcium carbonate-based slurry containing an aqueous binder and calcium carbonate powder of dense particles. I applied to the prototype of plastic or wax used in the lost wax method of manufacturing a casting shell this overcoat coat. And calcined at a high temperature in the environment that make using multiple immersion method of the silicate slurry, followed by an oxygen-rich - alumina template. Metal formed article is cast, the calcined mold can be cooled to about 800 ℃ or less. Significant savings in cost can be realized by the nature of the aqueous suspension is environmentally friendly binder slurry of organometallic and inevitable.