TiA1 based alloy, production process therefor, and rotor...

Details TiA1 based alloy, production process therefor, and rotor... TiA1 based alloy, production process therefor, and rotor...

2003-09-23

2009-11-17

King, Roy (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S671000

Reexamination Certificate

active

07618504

ABSTRACT:
A TiAl based alloy having excellent strength as well as an improvement in toughness at room temperature, in particular an improvement in impact properties at room temperature, and a production method thereof, and a blade using the same are provided. This TiAl based alloy has a microstructure in which lamellar grains having a mean grain diameter of from 1 to 50 μm are closely arranged. The alloy composition is Ti-(42-48)Al-(5-10)(Cr and/or V) or Ti-(38-43)Al-(4-10)Mn. The alloy can be obtained by subjecting the alloy to high-speed plastic working in the cooling process, after the alloy has been held in an equilibrium temperature range of the α phase or the (α+β) phase.

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