Ökonomisches, Warmgewalztes, Feuerverzinktes Stahlblech mit einer Qualität von 80 Mpa und Herstellungsverfahren dafür

Details

Veröffentlichungs-Nr.

EP4772664

Anmeldetag

28. August 2024

Veröffentlichung

6. März 2025

Rechtsraum

EP

Abstract

Disclosed in the present invention is an economical 800 MPa-grade hot-rolled hot-dip galvanized steel sheet, comprising a substrate and a hot-dip galvanized layer. The substrate contains Fe and inevitable impurities. In addition, the substrate further contains the following chemical elements in percentage by mass: 0.05-0.10% of C, 1.4-2.0% of Mn, 0.10-0.15% of Ti, and 0.02-0.08% of Al. The substrate does not contain elements Si, Cr, Mo and Ni. Microstructures of the substrate include a complex-phase structure of granular bainite and ferrite, and second-phase particle precipitates; the volume fraction of the second-phase particle precipitates is not less than 0.2%; and the ratio of the volume fraction of the second-phase particle precipitates having a size not greater than 10 nm to the volume fraction of all the second-phase particle precipitates is greater than 80%. Correspondingly, further disclosed in the present invention is a manufacturing method for the economical 800 MPa-grade hot-rolled hot-dip galvanized steel sheet.

Anmelder

Firma

BAOSHAN IRON & STEEL CO., LTD.

Land

🇨🇳 China