TITANIUM MATERIAL FOR HOT ROLLING AND MANUFACTURING METHOD THEREOF

Title:

TITANIUM MATERIAL FOR HOT ROLLING AND MANUFACTURING METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2010/090352

Kind Code:

A1

Abstract:

Provided are a titanium material for hot rolling with which surface defects (including side surfaces and edge parts, in addition to plate surfaces in the case of a plate or a band coil) can be reduced and a manufacturing method thereof, and particularly a titanium material for hot rolling and a manufacturing method thereof with which an ingot breakdown step can be eliminated. The titanium material for hot rolling has dimples, wherein the average height (Wc) of profile curvilinear elements of waves imparted by cold plastic deformation is 0.2‑1.5 mm and the average length (WSm) is 3‑15 mm, and surface defects that occur during hot rolling can be reduced even when the ingot breakdown step is eliminated. The aforementioned dimples are formed by means of cold plastic deformation of the surfaces of the titanium material for hot rolling using a steel tool having a front end shape with a curvature radius of 3‑30 mm or a steel ball having a radius of 3‑30 mm.

Inventors:

TAKAHASHI KAZUHIRO (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
OTSUKA HIROAKI (JP)
FUJII HIDEKI (JP)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
YAMAMOTO NORIO (JP)

Application Number:

PCT/JP2010/052129

Publication Date:

August 12, 2010

Filing Date:

February 08, 2010

Export Citation:

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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)
MIYAZAKI YOSHIMASA (JP)
ODA TAKASHI (JP)
TANAKA HISAMUNE (JP)
TADA OSAMU (JP)
YAMAMOTO NORIO (JP)

International Classes:

B21B1/02; B21B3/00; B21B45/00

Foreign References:

JPH01156456A	1989-06-20
JPS62214801A	1987-09-21
JP2004167517A	2004-06-17
JPH01156456A	1989-06-20

Other References: