Title:
強度傾斜部材用鋼板とその製造方法
Document Type and Number:
Japanese Patent JP5057299
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a steel sheet for a strength-inclined member which enables the production of the strength-inclined member with high productivity without requiring joining or quenching by a laser, or the like, and a production method therefor. SOLUTION: The steel sheet for the strength-inclined member is used as the stock before press forming for the strength-inclined member having a high strength part whose strength is higher than that of the other parts in a member subjected to aging treatment after press forming. The steel sheet is obtained by applying prestrain of >=5% to the place to be used as the above high strength part of the above high strain age hardening steel sheet having the following characteristics, preferably, by leveling: the characteristics that the tensile strength when heat treatment is performed at <=400 deg.C after the application of 5% strain increases by >=40 MPa compared with the tensile strength when the same aging treatment is performed without applying strain thereto.
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Inventors:
Jiro Hiramoto
Takaaki Hira
Shinjiro Kaneko
Akio Toyoda
Takashi Sakata
Takaaki Hira
Shinjiro Kaneko
Akio Toyoda
Takashi Sakata
Application Number:
JP2001027524A
Publication Date:
October 24, 2012
Filing Date:
February 02, 2001
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21D22/00; C22C38/00; C21D7/02
Domestic Patent References:
| JP5557327A | ||||
| JP49130311A |
Attorney, Agent or Firm:
Kenichiro Ochiai
Eiichi Kobayashi
Eiichi Kobayashi