Global Patent Index - EP 0906961 B1

EP 0906961 B1 2002-09-04 - Process for manufacturing steel strip for making metal containers by deep drawing and steel strip obtained

Title (en)

Process for manufacturing steel strip for making metal containers by deep drawing and steel strip obtained

Title (de)

Verfahren zum Herstellen von Stahlband für die Produktion metallischer Verpackungen durch Tiefziehen und also hergestelltes Stahlband

Title (fr)

Procédé de fabrication d'une bande de tôle d'acier pour la réalisation d'emballages métalliques par emboutissage et tôle d'acier obtenue

Publication

EP 0906961 B1 (FR)

Application

EP 98402383 A

Priority

FR 9712375 A

Abstract (en)

[origin: EP0906961A1] In the production of double reduction quality steel strip for deep drawn container manufacture, aging is carried out between the two final cold rolling passes following recrystallization annealing. Steel strip, for manufacture of deep drawn containers, is produced from a hot rolled strip of steel of composition (by wt.) up to 0.08 % C, ≤ 0.020 % Si, 0.05-0.60 % Mn, ≤ 0.020 % S, ≤ 0.020 % P, up to 0.018 % N, up to 0.060 % Al, ≤ 0.06 % Cu, ≤ 0.040 % Ni, optionally Cr and B, balance Fe and impurities by cold rolling, continuous recrystallization annealing and cold rolling to final thickness in two passes separated by aging at ≤ 300 degrees C for several minutes to several days. An Independent claim is also included for a double reduction type steel strip which is used for manufacture of deep drawn containers and which has high mechanical strength and good formability, the strip having (i) a first network of dislocations formed during the first double reduction pass and pinned by carbon and/or nitrogen during aging treatment and (ii) a second network of dislocations formed during the second double reduction pass.

IPC 1-7 (main, further and additional classification)

C21D 8/04

IPC 8 full level (invention and additional information)

C21D 8/04 (2006.01); C22C 38/06 (2006.01)

CPC (invention and additional information)

C21D 8/0468 (2013.01); C21D 8/0436 (2013.01); C22C 38/06 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

EPO simple patent family

EP 0906961 A1 19990407; EP 0906961 B1 20020904; AT 223503 T 20020915; CA 2246591 A1 19990403; CA 2246591 C 20070410; DE 69807617 D1 20021010; DE 69807617 T2 20030731; ES 2181143 T3 20030216; FR 2769251 A1 19990409; FR 2769251 B1 19991224; PT 906961 E 20030131; US 6156131 A 20001205

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