Title:
TITANIUM SLAB FOR HOT-ROLLING, AND SMELTING METHOD AND ROLLING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2010/090353
Kind Code:
A1
Abstract:
Provided are titanium slabs for hot-rolling that can be fed into a general purpose hot-rolling machine that produces band-shaped coils without passing through any breakdown processes such, as blooming, or any reforming processes, and with which the generation of surface flaws in the hot-rolled band-shaped coil can be suppressed, and a smelting method and rolling method therefor. The slabs are characterized in having surface layer structures wherein, in the cast titanium slab, the angle θ formed by the direction of crystal growth from the surface layer toward the interior (direction of solidification) and the direction parallel to the slab casting direction (longitudinal direction) is 45-90° and θ at 10 mm or greater is 70-90°. The slabs are also characterized in that a crystal layer of 10 mm or more is formed wherein the slope of the direction of axis C of the titanium α phase viewed from the side of the slab that has been rolled is in the range of 35-90° from the normal direction of the rolled surface. Said titanium slabs can be smelted by casting at a drawing speed of 1.0 cm/min or greater using an electron beam smelting furnace.
Inventors:
TAKAHASHI KAZUHIRO (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
OTSUKA HIROAKI (JP)
FUJII HIDEKI (JP)
FUJII YOSHIHIRO (JP)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
OTSUKA HIROAKI (JP)
FUJII HIDEKI (JP)
FUJII YOSHIHIRO (JP)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
Application Number:
PCT/JP2010/052130
Publication Date:
August 12, 2010
Filing Date:
February 08, 2010
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
TOHO TITANIUM CO LTD (JP)
TAKAHASHI KAZUHIRO (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
OTSUKA HIROAKI (JP)
FUJII HIDEKI (JP)
FUJII YOSHIHIRO (JP)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
TOHO TITANIUM CO LTD (JP)
TAKAHASHI KAZUHIRO (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
OTSUKA HIROAKI (JP)
FUJII HIDEKI (JP)
FUJII YOSHIHIRO (JP)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
International Classes:
B22D11/00; B22D11/041; B22D11/20; B22D21/06; B22D27/02; C22B9/22; C22B34/12
Foreign References:
| JP2007332420A | 2007-12-27 | |||
| JPH02121765A | 1990-05-09 | |||
| JPH07102351A | 1995-04-18 | |||
| JP2007039807A | 2007-02-15 |
Other References:
See also references of EP 2394756A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Atsushi Aoki (JP)
Atsushi Aoki (JP)
Download PDF:
Previous Patent: TITANIUM MATERIAL FOR HOT ROLLING AND MANUFACTURING METHOD THEREOF
Next Patent: THICKENER FOR THE PRODUCTION OF SOLID DETERGENTS
Next Patent: THICKENER FOR THE PRODUCTION OF SOLID DETERGENTS