Process for casting a beta-titanium alloy
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United States of America Patent
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Issued Date -
Oct 12, 2006
app pub date -
Mar 8, 2006
filing date -
Mar 8, 2005
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Abandoned
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Abstract
The invention relates to a process for casting objects from a .beta.-titanium alloy comprising titanium-molybdenum with a molybdenum content of from 7.5 to 25%. The invention provides for melting the alloy at a temperature of over 1770.degree. C., investment-casting the molten alloy into a casting mold corresponding to the object to be produced, hot isostatic pressing, solution annealing and then quenching. The process according to the invention provides economic production of objects made from .beta.-titanium alloys using the investment-casting process. The invention thereby provides the possibility of combining the advantageous properties of .beta.-titanium alloys, in particular their excellent mechanical properties, such as the low modulus of elasticity, with the advantages of producing castings using the investment-casting process. The invention means that even objects of complex shapes, which it was impossible to produce (economically) by conventional forging processes can be produced from a .beta.-titanium alloy.
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