Title:
TITANIUM SLAB FOR SURFACE MELTING TREATMENT AND TITANIUM MATERIAL FOR HOT ROLLING USING SAME
Document Type and Number:
WIPO Patent Application WO/2017/018454
Kind Code:
A1
Abstract:
Provided is a titanium slab for surface melting treatment which is used in production of a titanium material by forming a re-melted/solidified layer having a depth of d1, through surface melting treatment, on a surface of a titanium slab in an as-cast state obtained by DC slab casting in a vacuum or in an inert gas atmosphere, and performing hot rolling using the surface as a rolling surface, wherein an increase C1 in average oxygen concentration in a first region (a region between the surface and a position at d1/2) is 0.20 mass% or less, and an increase C2 in average oxygen concentration in a second region (a region between the position at d1/2 and a position at d1) is 0.05 mass% or less, with respect to the average oxygen concentration of a base material for the titanium slab, in the thickness direction of the titanium slab, and Cd (= C1 - C2) is more than 0 and not more than 0.15 mass%. The titanium slab for surface melting treatment has excellent workability in cold rolling or cold molding after hot rolling.
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Inventors:
FUJII HIDEKI (JP)
KUNIEDA TOMONORI (JP)
TATSUZAWA YOSHITSUGU (JP)
TAKAHASHI KAZUHIRO (JP)
MORI KENICHI (JP)
SANNOHE TAKESHI (JP)
MOROTOMI KEISUKE (JP)
INOUE YOUSUKE (JP)
KUNIEDA TOMONORI (JP)
TATSUZAWA YOSHITSUGU (JP)
TAKAHASHI KAZUHIRO (JP)
MORI KENICHI (JP)
SANNOHE TAKESHI (JP)
MOROTOMI KEISUKE (JP)
INOUE YOUSUKE (JP)
Application Number:
PCT/JP2016/072040
Publication Date:
February 02, 2017
Filing Date:
July 27, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
TOHO TITANIUM CO LTD (JP)
TOHO TITANIUM CO LTD (JP)
International Classes:
B22D11/041; B21B1/02; B21B3/00; B22D11/00; B23K15/00; C22C14/00; C22F1/00; C22F1/18
Domestic Patent References:
WO2014163089A1 | 2014-10-09 |
Foreign References:
JP2007332420A | 2007-12-27 |
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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