Stahlblech, Plattiertes Stahlblech und Automobilelement

Details

Veröffentlichungs-Nr.

EP4748957

Anmeldetag

12. Juli 2024

Veröffentlichung

23. Januar 2025

Rechtsraum

EP

Abstract

The present invention has as its technical issue the provision of steel sheet and plated steel sheet having a high LME resistance. The steel sheet of the present invention has a tensile strength of 780 MPa or more, has a predetermined chemical composition, has a surface roughness Ra of the steel sheet of more than 3.0 µm, has a depth in a thickness direction from the surface of the steel sheet wherein a C concentration is 0.02% or less of 8 µm or more, has a thickness in the thickness direction from the surface of the steel sheet of a layer having an area ratio of ferrite of 90% or more of more than 3.0 µm, and, in grazing incidence X-ray diffraction with an incidence angle of 1° with respect to the steel sheet surface 0.45 ≤ I(110) / ( I(110) + I(200) + I(211) ) ≤ 0.90 is satisfied, when I(110) denotes a diffraction intensity corresponding to the (110) plane, I(200) denotes a diffraction intensity corresponding to the (200) plane, and I(211) denotes a diffraction intensity corresponding to the (211) plane.

Anmelder

Firma

Nippon Steel Corporation

Land

🇯🇵 Japan