A Si-containing high-strength cold rolled steel sheet has a chemical composition comprising C: 0.02¼0.3 mass%, Si: 0.8¼2.0 mass%, Mn: 1.0¼5.0 mass% and the remainder being Fe and inevitable impurities with a ratio of Si content to Mn content (Si/Mn) exceeding 0.4, and has a tensile strength TS of not less than 780 MPa, wherein a metallic structure of the steel sheet surface contains polygonal ferrite and/or bainitic ferrite having a Si concentration of not more than 3.0 mass% and a grain size of not more than 10 µm and does not have a Si-containing oxide layer on the steel sheet surface.
PRODUCTION METHOD FOR A SI-CONTAINING HIGH STRENGTH COLD ROLLED STEEL SHEET
HERSTELLUNGSVERFAHREN FÜR EIN SI-HALTIGES HOCHFESTES KALTGEWALZTES STAHLBLECH
PROCÉDÉ DE PRODUCTION D'UNE TÔLE D'ACIER LAMINÉE À FROID, À HAUTE RÉSISTANCE ET CONTENANT DU SI
2018-12-19
Patent
Elektronische Ressource
Englisch
IPC: | C22C Legierungen , ALLOYS / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C23F Nichtmechanisches Entfernen metallischer Stoffe von Oberflächen , NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES / C23G CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS , Reinigen oder Entfetten metallischer Werkstoffe durch chemische Verfahren, ausgenommen Elektrolyse |
Steel, High Strength, Hot Rolled Sheet and Strip, Cold Rolled Sheet, and Coated Sheet1
SAE Technical Papers | 2017
STEEL, HIGH STRENGTH, HOT ROLLED SHEET AND STRIP, COLD ROLLED SHEET, AND COATED SHEET1
SAE Technical Papers | 1982
Methods for Producing High-Strength, Cold-Rolled Steel Sheet
SAE Technical Papers | 1974
|STEEL, HIGH STRENGTH, HOT ROLLED SHEET AND STRIP, COLD ROLLED SHEET, AND COATED SHEET1
SAE Technical Papers | 1984
High strength cold-rolled steel sheet for automotive applications
Tema Archiv | 1988
|