EP 4105343 A4 20230315 - HOT STAMP MOLDED ARTICLE
Title (en)
HOT STAMP MOLDED ARTICLE
Title (de)
HEISSPRÄGEGEFORMTER GEGENSTAND
Title (fr)
ARTICLE MOULÉ ESTAMPÉ À CHAUD
Publication
Application
Priority
- JP 2020022634 A 20200213
- JP 2020022635 A 20200213
- JP 2021005226 W 20210212
Abstract (en)
[origin: EP4105343A1] This hot-stamping formed article includes a steel sheet, all or part of the steel sheet has a predetermined chemical composition, at a 1/4 depth position of a sheet thickness from a surface of the steel sheet, a microstructure contains, by vol%, more than 90.0% of martensite, the average value of Vickers hardness in a region that is 0.3 mm in a sheet thickness direction and 0.6 mm in a direction orthogonal to the sheet thickness direction is 670 or more, the standard deviation of the Vickers hardness in the region is 20 or less, and the tensile strength is 2300 MPa or more.
IPC 8 full level
C21D 9/00 (2006.01); C21D 1/18 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/54 (2006.01); C23C 2/06 (2006.01)
CPC (source: EP KR US)
B21D 22/022 (2013.01 - KR US); C21D 1/18 (2013.01 - EP KR); C21D 1/26 (2013.01 - EP); C21D 1/673 (2013.01 - EP); C21D 7/13 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/0236 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C21D 9/46 (2013.01 - EP KR); C22C 38/001 (2013.01 - KR US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP); C22C 38/20 (2013.01 - US); C22C 38/22 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/34 (2013.01 - KR); C22C 38/42 (2013.01 - KR); C22C 38/44 (2013.01 - KR); C22C 38/54 (2013.01 - KR); C23C 2/02 (2013.01 - EP); C23C 2/06 (2013.01 - EP KR); C23C 2/12 (2013.01 - EP); C23C 2/28 (2013.01 - EP); C23C 2/40 (2013.01 - EP); B21D 22/022 (2013.01 - EP); C21D 2211/008 (2013.01 - EP KR)
Citation (search report)
- [E] EP 3943623 A1 20220126 - NIPPON STEEL CORP [JP]
- [A] EP 3584341 A1 20191225 - NIPPON STEEL CORP [JP]
- [A] AUTORENKOLLEKTIV: "Spurenelemente im Stahl - Moeglichkeiten zur Beeinflussung im Smelzbetrieb", SPURENELEMENTE IN STAEHLEN, VERLAG STAHLEISEN, DUESSELDORF, DE, 1 January 1985 (1985-01-01), pages 19 - 22, XP002433212
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4105343 A1 20221221; EP 4105343 A4 20230315; CN 115087755 A 20220920; CN 115087755 B 20230818; JP WO2021162084 A1 20210819; KR 20220124789 A 20220914; MX 2022009710 A 20220909; US 2023078690 A1 20230316; WO 2021162084 A1 20210819
DOCDB simple family (application)
EP 21752921 A 20210212; CN 202180013874 A 20210212; JP 2021005226 W 20210212; JP 2022500466 A 20210212; KR 20227027510 A 20210212; MX 2022009710 A 20210212; US 202117795741 A 20210212