Invention Grant
- Patent Title: Warm working method for stainless steel foil and mold for warm working
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Application No.: US15291177Application Date: 2016-10-12
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Publication No.: US09815103B2Publication Date: 2017-11-14
- Inventor: Katsunari Norita , Norimasa Miura
- Applicant: NISSHIN STEEL CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: Nisshin Steel Co., Ltd.
- Current Assignee: Nisshin Steel Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Rothwell, Figg, Ernst & Manbeck P.C.
- Priority: JP2012-215865 20120928; JP2013-198203 20130925
- Main IPC: B21D24/00
- IPC: B21D24/00 ; B21D24/16 ; B21D33/00 ; B21D22/20 ; B21D37/16
Abstract:
An austenitic stainless steel foil 2 with a thickness equal to or less than 300 μm is disposed to face a punch 12, and the stainless steel foil 2 is subjected to drawing in a state in which an annular region 2a of the stainless steel foil 2 that is in contact with a shoulder portion 12d of the punch 12 is set to a temperature up to 30° C. and an external region 2b outside the annular region 2a is set to a temperature of from 40° C. to 100° C.
Public/Granted literature
- US20170028456A1 WARM WORKING METHOD FOR STAINLESS STEEL FOIL AND MOLD FOR WARM WORKING Public/Granted day:2017-02-02
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