EP 1200635 B1 20031001 - HIGH TENSILE STEEL BAND OR SHEET AND METHOD FOR THE PRODUCTION THEREOF
Title (en)
HIGH TENSILE STEEL BAND OR SHEET AND METHOD FOR THE PRODUCTION THEREOF
Title (de)
HÖHERFESTES STAHLBAND ODER -BLECH UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
FEUILLE OU TOLE D'ACIER TRES RESISTANTE ET PROCEDE DE FABRICATION DE LADITE FEUILLE OU TOLE
Publication
Application
Priority
- DE 19936151 A 19990731
- EP 0007377 W 20000731
Abstract (en)
[origin: US6743307B1] The invention relates to a higher-strength steel strip or steel sheet comprising a predominantly ferritic-martensitic microstructure with a martensite content of between 4 and 20%, wherein the steel strip or steel sheet, apart from Fe and impurities due to smelting, comprises (in % by weight) 0.05-0.2% C, <=1.0% Si, 0.8-2.0% Mn, <=0.1% P, <=0.015% S, 0.02-0.4% Al, <=0.005% N, 0.25-1.0% Cr, 0.002-0.01% B. Preferably the martensite content is approximately 5% to 20% of the predominantly martensitic-ferritic microstructure. Such a higher-strength steel strip or steel sheet made from a dual phase steel comprises good mechanical/technological properties even after being subjected to an annealing process which includes an overageing treatment. Furthermore, the invention relates to a method for producing steel strip or steel sheet according to the invention.
IPC 1-7
IPC 8 full level
C21D 9/46 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C21D 9/52 (2006.01)
CPC (source: EP KR US)
C21D 8/0273 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - KR); C22C 38/38 (2013.01 - EP US); C21D 9/52 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US); Y10T 428/12799 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6743307 B1 20040601; AT E251226 T1 20031015; AU 6833200 A 20010219; AU 777321 B2 20041014; BR 0012906 A 20020604; CA 2380969 A1 20010208; CN 1180096 C 20041215; CN 1367846 A 20020904; CZ 2002317 A3 20020717; CZ 299072 B6 20080416; DE 19936151 A1 20010208; DE 50003922 D1 20031106; EP 1200635 A1 20020502; EP 1200635 B1 20031001; ES 2208410 T3 20040616; JP 2003505604 A 20030212; JP 4745572 B2 20110810; KR 100796819 B1 20080122; KR 20020037339 A 20020518; MX PA02001073 A 20021104; PL 194945 B1 20070731; PL 353858 A1 20031201; RU 2002105012 A 20040120; RU 2246552 C2 20050220; SK 1472002 A3 20021008; TR 200200259 T2 20020521; WO 0109396 A1 20010208; ZA 200200898 B 20030730
DOCDB simple family (application)
US 4877202 A 20020624; AT 00956356 T 20000731; AU 6833200 A 20000731; BR 0012906 A 20000731; CA 2380969 A 20000731; CN 00811187 A 20000731; CZ 2002317 A 20000731; DE 19936151 A 19990731; DE 50003922 T 20000731; EP 0007377 W 20000731; EP 00956356 A 20000731; ES 00956356 T 20000731; JP 2001513651 A 20000731; KR 20027001394 A 20020131; MX PA02001073 A 20000731; PL 35385800 A 20000731; RU 2002105012 A 20000731; SK 1472002 A 20000731; TR 200200259 T 20000731; ZA 200200898 A 20020131