Title:
HIGH STRENGTH TITANIUM ALLOY ENGINE VALVE FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JP2007100666
Kind Code:
A
Abstract:
To provide a high strength titanium alloy engine valve for automobile excellent in strength, fatigue strength and hot workability, and having sufficient wear resistance.
This engine valve for automobile is made of titanium alloy which contains Al of 4.4 wt.% or more and 5.5 wt.%, Fe of 1.4 wt.% or more and 2.3 wt.% and Mo of 1.5 wt.% or more and 5.3 wt.%, and satisfies conditions of impurities that Si is less than 0.1 wt.% and C is less than 0.01 wt.%, and of which remaining is titanium and unavoidable impurities. Oxidized hardened layer is formed on a part or whole of a surface of the engine valve, is coated by hard coating or is applied to peening process.
Inventors:
MORI KENICHI
FUJII HIDEKI
TOMINAGA TADAYOSHI
FUKAYA NORIMICHI
FUJII HIDEKI
TOMINAGA TADAYOSHI
FUKAYA NORIMICHI
Application Number:
JP2005294686A
Publication Date:
April 19, 2007
Filing Date:
October 07, 2005
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
F01L3/02; C22C14/00; C23C8/10; F01L3/04
Domestic Patent References:
| JP2002097914A | 2002-04-05 | |||
| JP2000204425A | 2000-07-25 | |||
| JPH0762474A | 1995-03-07 | |||
| JPH07269316A | 1995-10-17 | |||
| JPH03249313A | 1991-11-07 | |||
| JPH09195730A | 1997-07-29 | |||
| JP2001234313A | 2001-08-31 |
Attorney, Agent or Firm:
Shunta Naito
Hisataka Tanaka
Hisataka Tanaka
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