EP 1881083 A1 20080123 - Workpiece made of a high-strength steel alloy and its use
Title (en)
Workpiece made of a high-strength steel alloy and its use
Title (de)
Werkstück aus einer hochfesten Stahllegierung und dessen Verwendung
Title (fr)
Pièce en acier à haute résistance mécanique et sa utilisation
Publication
Application
Priority
DE 102006033813 A 20060719
Abstract (en)
Workpiece made from a high strength steel alloy contains (in wt.%) 0.11-0.18 carbon, 0.10-0.30 silicon, 1.60-2.20 manganese, less than 0.0015 phosphorus, less than 0.010 sulfur, 1.00-2.00 chromium, less than 0.020 nitrogen, 0.020-0.060 niobium, 0.001-0.004 boron, 0.001-0.050 titanium and a balance of iron. A semi-finished product in the form of sheet metal or tube with a ductile ferritic-perlitic structure is heat treated by austenizing, cooling in air and then optionally tempered. The workpiece has a tensile strength Rm of more than 1.200 MPa at a fraction elongation A5 of more than 12 %.
Abstract (de)
Werkstück aus einer hochfesten Stahllegierung, die in Massenanteilen aus Kohlenstoff (C) 0,11 - 0,18 Silizium (Si) 0,10 - 0,30 Mangan (Mn) 1,60 - 2,20 Phosphor (P) < 0,0015 Schwefel (S) < 0,010 Chrom (Cr) 1,00 - 2,00 Stickstoff (N) < 0,020 Niob (Nb) 0,020 - 0,060 Bor (B) 0.001 - 0,004 Titan (Ti) 0,001 - 0,050 und Eisen sowie erschmelzungsbedingter Verunreinigungen als Rest besteht, welches ausgehend vom Halbzeug Blech oder Rohr im luftgehärteten Zustand eine Zugfestigkeit Rm > 1.200 MPa bei einer Bruchdehnung A5 > 12 % aufweist. Das Werkstück eignet sich insbesondere als für den Einsatz luftgehärteter Kraftfahrzeugbauteile.
IPC 8 full level
C22C 38/00 (2006.01)
CPC (source: EP)
C21D 1/25 (2013.01); C21D 1/56 (2013.01); C22C 38/02 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/38 (2013.01); C21D 2211/002 (2013.01)
Citation (search report)
- [AD] EP 1565588 B1 20060322 - BENTELER STAHL ROHR GMBH [DE]
- [DA] DE 102004053620 A1 20060504 - SALZGITTER FLACHSTAHL GMBH [DE]
- [A] EP 0576107 A1 19931229 - MANNESMANN AG [DE]
- [A] JP H05302119 A 19931116 - SUMITOMO METAL IND
- [A] JP H07331381 A 19951219 - NIPPON STEEL CORP
- [A] KATSUMATA M ET AL: "DEVELOPMENT OF HIGH STRENGTH AND HIGH TOUGHNESS LOW CARBON - LOW ALLOY STEEL FOR HOT FORGED PARTS", KOBELCO TECHNOLOGY REVIEW, KOBE STEEL, KOBE, JP, no. 11, June 1991 (1991-06-01), pages 29 - 32, XP001038795, ISSN: 0913-4794
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1881083 A1 20080123; EP 1881083 B1 20091230; AT E453733 T1 20100115; DE 102007033950 A1 20080131; DE 502007002467 D1 20100211
DOCDB simple family (application)
EP 07014185 A 20070719; AT 07014185 T 20070719; DE 102007033950 A 20070719; DE 502007002467 T 20070719