Title:
METHOD FOR MANUFACTURING PROCESSED TITANIUM MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/149154
Kind Code:
A1
Abstract:
A method for manufacturing a titanium material in which a titanium ingredient is caused to pass through a gap between a pair of rolls, wherein: at least one roll of the pair of rolls has a plurality of protrusions arranged so as to have a zigzag shape when the surface of the roll is viewed in plan view; the manufacturing method comprises a step in which the protrusions are pressed into the surface of the titanium ingredient, thereby forming a plurality of dimples in the surface of the titanium ingredient; the protrusions are provided with spherical pressing surfaces at the distal ends thereof; and R is within the range from 3 to 30, D is within the range from 2 to 10 and is equal to or less than h, and S is within the range from 2(R2-(R-D)2)1/2 to 3(R2-(R-D)2)1/2, where h (mm) is the height of the pressing surfaces, R (mm) is the radius of curvature of the pressing surfaces of the protrusions, S (mm) is the distance between the centers of adjacent protrusions in the passage direction of the titanium ingredient, and D (mm) is the pressing amount of the protrusions. Using a processed titanium material obtained through this method makes it possible to reduce surface damage produced during hot-rolling.
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Inventors:
TAKAHASHI KAZUHIRO (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
MIYAZAKI YOSHIMASA (JP)
INOUE YOSUKE (JP)
TANAKA HISAMUNE (JP)
KUNIEDA TOMONORI (JP)
MORI KENICHI (JP)
MIYAZAKI YOSHIMASA (JP)
INOUE YOSUKE (JP)
TANAKA HISAMUNE (JP)
Application Number:
PCT/JP2020/001934
Publication Date:
July 29, 2021
Filing Date:
January 21, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
TOHO TITANIUM CO LTD (JP)
TOHO TITANIUM CO LTD (JP)
International Classes:
B21B1/02; B21B3/00; B21B27/02; B21B45/00; C22C14/00
Domestic Patent References:
| WO2020003784A1 | 2020-01-02 |
Foreign References:
| JP2018001249A | 2018-01-11 | |||
| JP2013076548A | 2013-04-25 | |||
| JPH09276903A | 1997-10-28 |
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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