Calcium titanate containing mold compositions and methods for casting titanium and titanium aluminide alloys
AssigneeGeneral Electric Company
InventorsBernard Patrick Bewlay, Joan McKiever, Brian Michael Ellis, Nicholas Vincent McLasky
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Abstract
The disclosure relates generally to mold compositions comprising calcium aluminate and calcium titanate. The disclosure also relates to methods of molding and the articles so molded using the mold compositions. More specifically, the disclosure relates to calcium aluminate/calcium titanate mold compositions and methods for casting titanium-containing articles, and the titanium-containing articles so molded.
Claims32
A mold composition for casting a titanium-containing article, comprising:
- calcium titanate;
- and
- a calcium aluminate cement comprising calcium monoaluminate.
A method for forming a casting mold for casting a titanium-containing article, said method comprising:
- combining calcium aluminate and calcium titanate with a liquid to produce a slurry of calcium aluminate and calcium titanate in the liquid;
- introducing the slurry into a mold cavity that contains a fugitive pattern;
- and
- allowing the slurry to cure in the mold cavity to form the casting mold of the titanium-containing article.
A casting method for titanium and titanium alloys comprising:
- obtaining an investment casting mold composition comprising calcium aluminate, calcium titanate, and aluminum oxide;
- pouring said investment casting mold composition into a vessel containing a fugitive pattern;
- curing said investment casting mold composition;
- removing said fugitive pattern from the mold;
- preheating the mold to a mold casting temperature;
- pouring molten titanium or titanium alloy into the heated mold;
- solidifying the molten titanium or titanium alloy and forming a solidified titanium or titanium alloy casting;
- and
- removing the solidified titanium or titanium alloy casting from the mold.
Dependencies are inferred from the claim text.