Method for production of precision castings by centrifugal...

Details Method for production of precision castings by centrifugal... Method for production of precision castings by centrifugal...

2007-04-11

2011-12-13

Wyszomierski, George (Department: 1733)

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

C148S669000, C164S114000

Reexamination Certificate

active

08075713

ABSTRACT:
A production of precision castings by centrifugal casting, includes the following steps: a) providing in a crucible (8) a melt of the following composition: Ti45-52 at. %Al45-50 at. %Xl1-3 at. %X22-4 at. %X30-1 at. %/where Xl =Cr, Mn, V, X2=Nb, Ta, W, Mo, X3=Si, B, C; b) forcing the melt by means of centrifugal forces from the crucible (8) into a mold (4); c) solidifying the melt within the mold thereby creating a casting consisting of a titanium alloy having a lamellar microstructure; and d) reheating the casting for a duration of 60 to 150 hours at a temperature higher than the eutectic temperature and lower than the alpha-transus temperature of the composition.

REFERENCES:
patent: 5284620 (1994-02-01), Larsen, Jr.
patent: 5634992 (1997-06-01), Kelly et al.
patent: 5950706 (1999-09-01), Choudhury et al.
patent: 6231699 (2001-05-01), Kelly et al.
patent: 2004/0060685 (2004-04-01), Ray et al.
Metals Handbook, Desk Edition, (1985), pp. 28-65 to 28-66.

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