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Title:
TITANIUM COMPOSITE MATERIAL AND TITANIUM MATERIAL FOR HOT ROLLING
Document Type and Number:
WIPO Patent Application WO/2017/018509
Kind Code:
A1
Abstract:
A titanium composite material 1 comprising: an inner layer 5 comprising pure titanium for industrial use or a titanium alloy; a surface layer 3 formed upon at least one surface of the inner layer 5 and having a different chemical composition from the inner layer 5; and an intermediate layer formed between the inner layer 5 and the surface layer 3 and having a different chemical composition from the inner layer 5. The surface layer 3 has a thickness of at least 2 µm and a ratio to the total thickness of no more than 40% per single surface. The thickness of the intermediate layer is at least 0.5 µm. The chemical composition of the surface layer 3 comprises 0.08%-1.0% of at least one type selected from Fe, Cr, Ni, Al, and Zr, with the remainder being titanium and impurities. Although inexpensive, this titanium composite material has a desired fatigue resistance.

Inventors:
MITSUDA, Koji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
KUNIEDA, Tomonori (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TATSUZAWA, Yoshitsugu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TAKAHASHI, Kazuhiro (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2016/072331
Publication Date:
February 02, 2017
Filing Date:
July 29, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
B21B1/02; B21B3/00; C22C14/00; B23K15/00; B23K20/04; C22F1/00; C22F1/18
Domestic Patent References:
2014-10-09
Foreign References:
US5579988A1996-12-03
JPH03197630A1991-08-29
JPS6380904A1988-04-11
JPS62124265A1987-06-05
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (2-5-10, Sonezaki Kita-ku, Osaka-sh, Osaka 57, 〒5300057, JP)
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