EP 2729587 A1 20140514 - A METHOD OF HOT-SHAPING AND HARDENING A SHEET STEEL BLANK
Title (en)
A METHOD OF HOT-SHAPING AND HARDENING A SHEET STEEL BLANK
Title (de)
VERFAHREN ZUM HEISSFORMEN UND HÄRTEN EINES STAHLBLECHROHLINGS
Title (fr)
PROCÉDÉ DE FAÇONNAGE À CHAUD ET DE DURCISSEMENT D'UN FLAN DE TÔLE D'ACIER
Publication
Application
Priority
- SE 1100523 A 20110706
- SE 2012000104 W 20120704
Abstract (en)
[origin: WO2013006108A1] A sheet steel blank is heated to the austenite range and formed in a cooled tool pair that rapidly cools the formed product until the product's temperature drops somewhat below the temperature Ms for the start of the formation of martensite. The cooling is rapidly interrupted and the product's temperature is raised until it exceeds Ms and is maintained there until the material comes to contain more than 50% by volume bainite. The short time under the Ms temperature favours the formation of bainite and shortens the holding time.
IPC 8 full level
C21D 1/673 (2006.01); B21D 22/02 (2006.01); C21D 1/18 (2006.01); C21D 1/19 (2006.01); C21D 1/20 (2006.01); C21D 9/00 (2006.01)
CPC (source: EP SE US)
B21D 22/02 (2013.01 - SE); B21D 22/022 (2013.01 - EP US); C21D 1/19 (2013.01 - SE); C21D 1/20 (2013.01 - EP US); C21D 1/673 (2013.01 - EP SE US); C21D 8/0205 (2013.01 - EP US); C21D 8/0221 (2013.01 - EP US); C21D 8/0247 (2013.01 - EP US); C21D 9/0068 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/02 (2013.01 - US); C22C 38/04 (2013.01 - US); C21D 2211/002 (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
DOCDB simple family (publication)
WO 2013006108 A1 20130110; CN 103582707 A 20140212; EP 2729587 A1 20140514; EP 2729587 A4 20150318; JP 2014524979 A 20140925; KR 20140051934 A 20140502; SE 1100523 A1 20130102; SE 535821 C2 20130102; US 2015090378 A1 20150402
DOCDB simple family (application)
SE 2012000104 W 20120704; CN 201280027136 A 20120704; EP 12808151 A 20120704; JP 2014518485 A 20120704; KR 20147003040 A 20120704; SE 1100523 A 20110706; US 201213261782 A 20120704