EP 1327692 A3 20040512 - Process for manufacturing of a steel product and product obtained

Title (en)

Process for manufacturing of a steel product and product obtained

Title (de)

Verfahren zur Herstellung eines Produkts aus Stahl und danach hergestelltes Produkt

Title (fr)

Procédé pour la fabrication d'un produit en acier et produit obtenu

Publication

EP 1327692 A3 20040512 (DE)

Application

EP 02028379 A 20021218

Priority

DE 10201009 A 20020111
US 33805003 A 20030108

Abstract (en)

[origin: EP1327692A2] For the production of a steel component (15), e.g. for construction, the steel has an initial metastable phase to give it a first set of characteristics. The material is processed in a second phase by a thermodynamic action which gives the steel a second set of characteristics. The first phase is austenite, and the second phase is bainite or martensite. The component has alternating soft zones (10) and hard zones (11) with a circular cross-section (B,C). During the second phase the hard zones resist distortion to give only an out-of-round shape (B'), and the soft zones (10') collapse readily into a star shape (C').

IPC 1-7

C21D 8/00; C21D 8/02; C21D 8/10; C21D 1/42

IPC 8 full level

C21D 1/42 (2006.01); C21D 8/02 (2006.01); C21D 9/60 (2006.01); C22C 38/00 (2006.01); C21D 8/10 (2006.01)

CPC (source: EP US)

C21D 8/02 (2013.01 - EP US); C21D 8/0221 (2013.01 - EP US); C21D 8/0247 (2013.01 - EP US); C21D 8/10 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US); C21D 2221/00 (2013.01 - EP US)

Citation (search report)

[XY] EP 0803582 A2 19971029 - DENSO CORP [JP]
[Y] US 4105971 A 19780808 - NEVALAINEN HARRI
[YD] DE 19727759 A1 19990107 - MAX PLANCK INST EISENFORSCHUNG [DE]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

DOCDB simple family (publication)

EP 1327692 A2 20030716; EP 1327692 A3 20040512; EP 1327692 B1 20120530; DE 10201009 C1 20031016; JP 2003231916 A 20030819; US 2004129355 A1 20040708

DOCDB simple family (application)

EP 02028379 A 20021218; DE 10201009 A 20020111; JP 2003002451 A 20030108; US 33805003 A 20030108