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Patent Searching and Data


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.

Inventors:
NISHIDA, Yukihiro (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
KAWANO, Akinori (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
TSUBOI, Koichi (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
MIZOGUCHI, Taichirou (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
SUZUKI, Satoshi (4-1, Marunouchi 3 chome, Chiyoda-k, Tokyo 66, 〒1008366, JP)
Application Number:
JP2018/045292
Publication Date:
July 04, 2019
Filing Date:
December 10, 2018
Export Citation:
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Assignee:
NISSHIN STEEL CO., LTD. (4-1 Marunouchi 3 chome, Chiyoda-ku Tokyo, 66, 〒1008366, JP)
International Classes:
C21D9/00; B21J5/00; B21J5/02; C22C38/00; C22C38/50; G11B23/00; B21D28/16
Foreign References:
JP2013222487A2013-10-28
JP2003221654A2003-08-08
JP2004332021A2004-11-25
JP2004068118A2004-03-04
JP2012123884A2012-06-28
US20080019037A12008-01-24
JP2018156710A2018-10-04
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
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