EP 4316684 A1 20240207 - MOLDING METHOD, HEAT TREATMENT SYSTEM, AND MOLDED PRODUCT
Title (en)
MOLDING METHOD, HEAT TREATMENT SYSTEM, AND MOLDED PRODUCT
Title (de)
FORMVERFAHREN, WÄRMEBEHANDLUNGSSYSTEM UND FORMPRODUKT
Title (fr)
PROCÉDÉ DE MOULAGE, SYSTÈME DE TRAITEMENT THERMIQUE ET PRODUIT MOULÉ
Publication
Application
Priority
- JP 2021056979 A 20210330
- JP 2022015940 W 20220330
Abstract (en)
In heating step S101, a steel sheet is heated and made in an austenite state. In heating step S101, the whole region of the steel sheet is evenly heated, and the whole region of the steel sheet is made in the austenite state. In cooling step S102, only a first region set on the steel sheet in the austenite state is forcibly cooled (rapidly cooled) within a temperature range of a range where martensitic transformation does not occur. In cooling step S102, a second region other than the first region is cooled by natural cooling to maintain a state in which a temperature is higher than in the first region.
IPC 8 full level
B21D 22/20 (2006.01); C21D 1/18 (2006.01); C21D 9/00 (2006.01)
CPC (source: EP US)
C21D 1/18 (2013.01 - US); C21D 1/673 (2013.01 - EP); C21D 8/0205 (2013.01 - US); C21D 8/0221 (2013.01 - US); C21D 8/0294 (2013.01 - US); C21D 9/0062 (2013.01 - US); C21D 9/46 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP US)
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 4316684 A1 20240207; EP 4321631 A2 20240214; EP 4321631 A3 20240228; JP 2022154099 A 20221013; JP 7052116 B1 20220411; US 2024043957 A1 20240208; US 2024167115 A1 20240523; WO 2022210868 A1 20221006
DOCDB simple family (application)
EP 22781078 A 20220330; EP 23205839 A 20220330; JP 2021056979 A 20210330; JP 2022015940 W 20220330; US 202218552719 A 20220330; US 202318487518 A 20231016