Title:
極めて高い強度を有するプレス硬化鋼および製造方法
Document Type and Number:
Japanese Patent JP6893072
Kind Code:
B2
Abstract:
Press hardened steels exhibit increased strength in the press hardened steel parts without a corresponding decrease in elongation. Substitutional elements are included in the steel composition to increase the strength of martensite through a combination of substitutional solute strengthening and a reduction in softening that results from autotempering. Softening as a result of autotempering is minimized by suppression of the martensite start (Ms) temperature through the alloying. As a result of the increased hardenability in the proposed compositions that results from various additions of manganese, chromium, molybdenum, and niobium, the steel compositions permit a boron-free press hardening steel.
Inventors:
Pubrina, Eric, James
Application Number:
JP2019547482A
Publication Date:
June 23, 2021
Filing Date:
February 23, 2018
Export Citation:
Assignee:
AK Steel Properties, Inc.
International Classes:
C22C38/38; C22C38/00
Domestic Patent References:
| JP6004138B2 | ||||
| JP2015131995A | ||||
| JP2018512503A | ||||
| JP2017525849A |
Foreign References:
| WO2013105631A1 | ||||
| WO2011158818A1 | ||||
| WO2016146581A1 | ||||
| WO2016016676A1 | ||||
| WO2013118862A1 | ||||
| WO2015144318A1 | ||||
| KR101677398B1 | ||||
| US20090238715 |
Attorney, Agent or Firm:
Taro Yaguchi