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Title:
TITANIUM SLAB FOR HOT ROLLING, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2016/051502
Kind Code:
A1
Abstract:
A melted and resolidified layer, which has a depth of at least 1 mm and is obtained by adding, melting, and resolidifying at least one β-phase-stabilizing element, is provided to the surface to be rolled of a titanium slab comprising a titanium alloy produced using an electron beam melting method or a plasma arc melting method. The average concentration of the β-phase-stabilizing element in a range up to a depth of 1 mm is at least 0.08 mass% but not more than 1.50 mass% higher than the concentration of the β-phase-stabilizing element in the parent metal. Powder, chippings, wire, and foil are used as raw materials which include the β-phase-stabilizing element. Furthermore, electron beam heating and plasma arc heating are used as means for melting the surface layer.

Inventors:
TATSUZAWA, Yoshitsugu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
KUNIEDA, Tomonori (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
MORI, Kenichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
FUJII, Hideki (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:
JP2014/076083
Publication Date:
April 07, 2016
Filing Date:
September 30, 2014
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:
C23C26/00; B21B1/02; B21B3/00; B22D21/06; B22D29/00; C22C14/00
Domestic Patent References:
WO2014163087A12014-10-09
Foreign References:
JP2007332420A2007-12-27
JPH09314278A1997-12-09
Other References:
See also references of EP 3202953A4
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (Hazuki International Yotsuya, Daiichi Tomizawa Building 1-3, Yotsuya 3-chom, Shinjuku-ku Tokyo 04, 〒1600004, JP)
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