Methods for centrifugally casting highly reactive titanium metals

a technology of titanium alloys and centrifugal casting, which is applied in the field of centrifugally casting highly reactive titanium alloys, can solve the problems of high cost of labor, difficult and expensive to produce non-standard alloys, and high cost of titanium electrodes used in the var process
US20110094705A1Inactive Publication Date: 2011-04-28GENERAL ELECTRIC CO
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
GENERAL ELECTRIC CO
Publication Date
2011-04-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods for centrifugally casting a highly reactive titanium metal involving providing a cold wall induction crucible having a plurality of induction coils and a removable bottom plate, using a power source to heat a titanium metal charge in the induction crucible to obtain a molten metal, preheating a secondary crucible and placing the preheated secondary crucible into a centrifugal casting machine, positioning the centrifugal casting machine having the secondary crucible beneath the induction crucible, withdrawing the bottom plate of the induction crucible and turning off the power source to the induction crucible to allow the molten metal to fall from the induction crucible into the secondary crucible, and accelerating the secondary crucible to centrifugally force the molten metal into a casting mold to produce a cast component.
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Description

TECHNICAL FIELD

[0001] Embodiments described herein generally relate to methods for centrifugally casting highly reactive metals. More particularly, embodiments herein generally describe methods for centrifugally casting highly reactive titanium alloys, and in particular, titanium aluminide alloys.BACKGROUND OF THE INVENTION

[0002] Turbine engine designers are continuously looking for new materials with improved properties for reducing engine weight and obtaining higher engine operating temperatures. Titanium alloys (Ti alloys), and in particular, titanium aluminide based alloys (TiAl alloys), possess a promising combination of low-temperature mechanical properties, such as room temperature ductility and toughness, as well as high intermediate temperature strength and creep resistance. For these reasons, TiAl alloys have the potential to replace nickel-based superalloys, which are currently used to make numerous turbine engine components.

[0003] Vacuum Arc Re-melting (VAR) is one techniqu...

Claims

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