Title:
SPACER, HARD DISK DRIVE, AND PRODUCTION METHOD FOR SPACER
Document Type and Number:
WIPO Patent Application WO/2019/131084
Kind Code:
A1
Abstract:
Provided is a spacer having excellent magnetic characteristics. This spacer (12) is produced by forming a sheet of a ferrite stainless steel into a ring shape, and thereafter, applying heat and pressure to the ring-shaped sheet at a temperature of not lower than 900°C but lower than the austenite transformation start temperature Ac1.
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Inventors:
NISHIDA YUKIHIRO (JP)
KAWANO AKINORI (JP)
TSUBOI KOICHI (JP)
MIZOGUCHI TAICHIROU (JP)
SUZUKI SATOSHI (JP)
KAWANO AKINORI (JP)
TSUBOI KOICHI (JP)
MIZOGUCHI TAICHIROU (JP)
SUZUKI SATOSHI (JP)
Application Number:
PCT/JP2018/045292
Publication Date:
July 04, 2019
Filing Date:
December 10, 2018
Export Citation:
Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C21D9/00; B21J5/00; B21J5/02; C22C38/00; C22C38/50; G11B23/00; B21D28/16
Foreign References:
| JP2013222487A | 2013-10-28 | |||
| JP2003221654A | 2003-08-08 | |||
| JP2004332021A | 2004-11-25 | |||
| JP2004068118A | 2004-03-04 | |||
| JP2012123884A | 2012-06-28 | |||
| US20080019037A1 | 2008-01-24 | |||
| JP2018156710A | 2018-10-04 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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