EP 0564309 B1 19960605 - Process for manufacturing of steel sheets and steel sheets obtained by this process
Title (en)
Process for manufacturing of steel sheets and steel sheets obtained by this process
Title (de)
Verfahren zur Herstellung von Stahlblechen und Stahlbleche, nach diesem Verfahren hergestellt
Title (fr)
Procédé d'élaboration d'une tÔle d'acier et tÔle d'acier obtenue par ce procédé
Publication
Application
Priority
FR 9202407 A 19920228
Abstract (en)
[origin: FR2688009A1] Process for producing a sheet from a steel slab, in which a steel is employed whose weight composition is the following: - carbon less than 0.05 % - manganese from 1.5 to 2 % - silicon from 0.1 to 0.5 % - molybdenum from 0.2 to 0.5 % - phosphorus less than 0.03 % - sulphur less than 0.01 % - niobium from 0.04 to 0.06 % - titanium from 0.02 to 0.05 % - aluminium from 0.01 to 0.06 % - boron from 10 to 40 ppm, the nitrogen and titanium contents satisfying the relationship 3.5 N </= Ti, the remainder consisting of iron and impurities, hot rolling of the steel slab is performed in a wide-strip rolling mill with a degree of cold working in a finishing rolling mill of between 70 and 95 % to obtain, at the exit of the said rolling, a steel sheet whose temperature is between 800 and 900<o>C, the sheet is cooled with water and air at a cooling rate of between 50 and 150<o>C/s in the austenitic region and reeling of the sheet cooled to a temperature of between 500 and 600<o>C is performed.
IPC 1-7
IPC 8 full level
B21C 47/02 (2006.01); C21D 8/02 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP)
B21C 47/02 (2013.01); C21D 8/0226 (2013.01); C22C 38/04 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
FR 2688009 A1 19930903; FR 2688009 B1 19940527; DE 69302950 D1 19960711; DE 69302950 T2 19970116; EP 0564309 A1 19931006; EP 0564309 B1 19960605
DOCDB simple family (application)
FR 9202407 A 19920228; DE 69302950 T 19930204; EP 93400287 A 19930204