Title:
TiAl基合金及びその製造方法並びにそれを用いた動翼
Document Type and Number:
Japanese Patent JP4287991
Kind Code:
B2
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 mu m 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 alpha phase or the ( alpha + beta ) phase.
Inventors:
Toshimitsu Tetsui
Kentaro Shindo
Takeyama Masao
Kentaro Shindo
Takeyama Masao
Application Number:
JP2000259831A
Publication Date:
July 01, 2009
Filing Date:
August 29, 2000
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
C22C14/00; F01D5/28; B21J5/00; B21K3/04; C22C21/00; C22F1/00; C22F1/04; C22F1/18; F02B39/00
Domestic Patent References:
| JP6049569A | ||||
| JP4124236A |
Other References:
J.N.Wang、他1名,Grain size refinement of a TiAl alloy by rapid heat treatment,Scripta materialia,米国,2000年 8月14日,Vol.43 No.5,Page.441-446
Attorney, Agent or Firm:
Noriharu Fujita
Shigemitsu Tanaka
Shigemitsu Tanaka
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