Title:
ホットスタンプ成形体
Document Type and Number:
Japanese Patent JP7319569
Kind Code:
B2
Abstract:
A hot-stamping formed body has a predetermined chemical composition and includes microstructure which includes residual austenite of which an area ratio is in a range of 20% to 30%. Among grain boundaries of crystal grains of bainite and tempered martensite in the microstructure, a ratio of a length of a grain boundary having a rotation angle in a range of 55° to 75° to a total length of a grain boundary having a rotation angle in a range of 4° to 12°, a grain boundary having a rotation angle in a range of 49° to 54°, and a grain boundary having a rotation angle in a range of 55° to 75° to the <011> direction as a rotation axis is 30% or more.
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Inventors:
Yuri Toda
Teruhiro Murasawa
Daisuke Maeda
Kazuo Hikida
Teruhiro Murasawa
Daisuke Maeda
Kazuo Hikida
Application Number:
JP2021570094A
Publication Date:
August 02, 2023
Filing Date:
January 08, 2021
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; C22C38/60
Domestic Patent References:
| JP2014520961A |
Foreign References:
| WO2018033960A1 | ||||
| WO2019186930A1 | ||||
| WO2020241258A1 | ||||
| WO2020195009A1 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Onami Kazunori
Tomoo Katsumata
Hiroshi Yamaguchi
Koichiro Hotta
Kengo Yamaguchi
Yasuhiro Iida
Shota Iguchi
Onami Kazunori
Tomoo Katsumata
Hiroshi Yamaguchi
Koichiro Hotta
Kengo Yamaguchi
Yasuhiro Iida
Shota Iguchi
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