Title:
プレス用鋼板の製造方法、プレス部品の製造方法、及び伸びフランジ成形性の評価方法
Document Type and Number:
Japanese Patent JP7264090
Kind Code:
B2
Abstract:
To further suppress cracking of an elongation flange part by setting a more appropriate heating treatment temperature and heating range according to a steel material.SOLUTION: There is provided a method for manufacturing a steel sheet for press to be subjected to press working. The method includes a shearing process 10A for applying shearing work to at least a part of the end of a steel plate, and a heating process 10B for heating a preset heating range from the end of at least a part of the end of the shearing steel plate. The method includes: a ductility estimation step 10C of estimating a change in ductility of a heated part by setting the heating temperature of the heating process 10B at 600°C or more and less than 800°C and further heating under the same heating conditions as in the heating step 10B; and a heating range determination step 10D of setting a heating range to a range of 3 mm or more from an end face when ductility is estimated to be improved, and setting a heating range to a range of 6 mm or less from the end face when ductility is estimated to be lowered, based on the estimation in the ductility estimation step 10C.SELECTED DRAWING: Figure 5
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Inventors:
Yuichi Matsuki
Shingu Toyohisa
Kinya Nakagawa
Mountain Saki Yuji
Shingu Toyohisa
Kinya Nakagawa
Mountain Saki Yuji
Application Number:
JP2020038538A
Publication Date:
April 25, 2023
Filing Date:
March 06, 2020
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21D9/46; B21D22/00; B21D22/20; C21D1/26; C21D1/42; C21D6/00; C21D11/00
Domestic Patent References:
| JP2019502819A | ||||
| JP2000309842A | ||||
| JP2000054072A | ||||
| JP2015161023A |
Foreign References:
| WO2013018723A1 | ||||
| WO2019131289A1 |
Attorney, Agent or Firm:
田中 秀▲てつ▼
Hirose Hajime
Miyasaka Tohru
Tetsuya Mori
Hirose Hajime
Miyasaka Tohru
Tetsuya Mori