Invention Grant
- Patent Title: Method for manufacturing hot stamped body and hot stamped body
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Application No.: US13879061Application Date: 2011-10-21
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Publication No.: US09598745B2Publication Date: 2017-03-21
- Inventor: Kunio Hayashi , Toshimitsu Aso , Toshimasa Tomokiyo , Hitoshi Tanino , Ryozo Wada
- Applicant: Kunio Hayashi , Toshimitsu Aso , Toshimasa Tomokiyo , Hitoshi Tanino , Ryozo Wada
- Applicant Address: JP Tokyo JP Toyota-shi JP Toyota-shi
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION,TOYOTA JIDOSHA KABUSHIKI KAISHA,AISIN TAKAOKA CO., LTD.
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION,TOYOTA JIDOSHA KABUSHIKI KAISHA,AISIN TAKAOKA CO., LTD.
- Current Assignee Address: JP Tokyo JP Toyota-shi JP Toyota-shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2010-237249 20101022; JP2010-289527 20101227
- International Application: PCT/JP2011/074297 WO 20111021
- International Announcement: WO2012/053636 WO 20120426
- Main IPC: C21D8/02
- IPC: C21D8/02 ; C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/06 ; C22C38/28 ; C22C38/32 ; C22C38/38 ; C23C2/02 ; C25D5/36

Abstract:
The present invention provides a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac1° C. and lower than Ac3° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.
Public/Granted literature
- US20130292009A1 METHOD FOR MANUFACTURING HOT STAMPED BODY AND HOT STAMPED BODY Public/Granted day:2013-11-07
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