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Title:
AUTOMOTIVE ENGINE VALVE COMPRISING TITANIUM ALLOY AND HAVING EXCELLENT HEAT RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2011/105620
Kind Code:
A1
Abstract:
Disclosed is an automotive engine valve comprising a titanium alloy and having excellent heart resistance, which comprises (in mass%) not less than 5.5% and less than 6.5% of Al, not less than 1.5% and less than 5.0% of Sn, not less than 4.6% and less than 6.0% of Zr, not less than 0.3% and less than 0.5% of Mo, not less than 0.35% and less than 0.60% of Si, and not less than 0.05% and less than 0.14% of O, Fe, Ni and Cr in the total amount of not less than 0.01% and less than 0.07%, with the remainder being titanium and unavoidable impurities. The automotive engine valve has higher creep resistance and high-temperature fatigue strength compared with those of conventional engine valves, also has excellent ductility at room temperature after being exposed to high temperature environments and excellent impact resistance, and can withstand the use at higher temperature for a longer period compared to conventional engine valves.

Inventors:
MORI, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
森 健一 (〒71 東京都千代田区丸の内二丁目6番1号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
FUJII, Hideki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
藤井 秀樹 (〒71 東京都千代田区丸の内二丁目6番1号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
Application Number:
JP2011/054825
Publication Date:
September 01, 2011
Filing Date:
February 24, 2011
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目6番1号 Tokyo, 〒1008071, JP)
Aisan Kogyo Kabushiki Kaisha (1-1 Kyowa-cho 1-chome, Obu-shi Aichi, 88, 〒4748588, JP)
愛三工業株式会社 (〒88 愛知県大府市共和町一丁目1番地の1 Aichi, 〒4748588, JP)
MORI, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
森 健一 (〒71 東京都千代田区丸の内二丁目6番1号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
International Classes:
F01L3/02; C22C14/00; C22F1/18; C22F1/00
Foreign References:
JPH0222435A1990-01-25
JPH0375385A1991-03-29
JPS63118035A1988-05-23
JP2005320618A2005-11-17
JP2007064165A2007-03-15
JP2006207490A2006-08-10
JP2010053419A2010-03-11
JP2001234313A2001-08-31
JP2007092535A2007-04-12
JP2004169128A2004-06-17
JP2007100666A2007-04-19
JP2002097914A2002-04-05
JP2010053419A2010-03-11
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
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Claims:



 
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