Method of producing a strip of sheet steel hot rolled with a limit of elasticity and high steel sheet obtained.

摘要

PROCEDURE OF REALIZATION OF A BAND OF STEEL PLATE HOT ROLLED WITH VERY HIGH ELASTICITY LIMIT PARTICULARLY SUITABLE FOR PARTS shaping and presenting a FRAGILE TRANSITION / DUCTIL TO A SLOWER temperature at -50 (degree) C, wherein the STEEL PONDERAL the following composition: - CARBON eXCEEDING 0.1%, 1% or higher MANGANESE eXCEEDING 1.5% - SILICON eXCEEDING 0.3%, - PHOSPHORUS eXCEEDING 0.03% SULFUR EXCEEDING 0.01% - 0.01% EXCEEDING EXCEEDING ALUMINUM 0.1%, - 0.04% niobium EXCEEDING EXCEEDING 0, 06%, - 0.1% EXCEEDING TITANIUM EXCEEDING 0.15%, 0.1 EXCEEDING MOLYBDENUM EXCEEDING 0.2%, is subjected AFTER HOT rOLLED, A CONTROLLED COOLING a cooling rate between 20 (degrees) C per second and 100 (degrees) C per second to a FIN TEMPERATURE IN COOLING UNDERSTOOD TRE 550 and 750 (degrees) C. The invention also concerns the obtained veneer.