Title:
HOT-STAMP FORMED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2023/199777
Kind Code:
A1
Abstract:
This hot-stamp formed article comprises a steel sheet. The steel sheet has a prescribed chemical composition. In the steel sheet, the average B-concentration in a region between a depth of 5.0 μm from the surface and a depth of 25.0 μm from the surface is at most 0.700 times the B-concentration in a position at a depth of 100 μm from the surface. The average B-concentration in a region between a depth of 0.5 μm from the surface and a depth of 4.0 μm from the surface is at least 1.600 times the B-concentration in a position at a depth of 100 μm from the surface. The average O-concentration in said region between a depth of 0.5 μm from the surface and a depth of 4.0 μm from the surface is more than 0.0150 mass%.
Inventors:
HAGA JUN (JP)
Application Number:
PCT/JP2023/013803
Publication Date:
October 19, 2023
Filing Date:
April 03, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; B21D22/20; C21D1/18; C21D9/00; C21D9/46; C22C38/58
Domestic Patent References:
| WO2016163469A1 | 2016-10-13 | |||
| WO2019003449A1 | 2019-01-03 |
Foreign References:
| JP2021155793A | 2021-10-07 | |||
| JP2006152427A | 2006-06-15 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF: