Plated steel material

US12043900B2 · kind B2 · utility

Assignee

• NIPPON STEEL CORPORATION · JP

Inventors

• Kohei Tokuda · Tokyo, JP
• Mamoru Saito · Tokyo, JP
• Takuya MITSUNOBU · Tokyo, JP
• Tetsuya TOBA · Tokyo, JP
• Yasuto Goto · Kimitsu, JP
• Atsushi Morishita · Chiba, JP
• Yasuaki Kawamura · Tokyo, JP
• Fumiaki Nakamura · Sumida, JP
• Koji Kawanishi · Tamano, JP

Key dates

• Filing date: Nov 30, 2021
• Grant date: Jul 23, 2024
• Expiry date: Nov 30, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D3/08
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A plated steel material having a plating layer having an average chemical composition containing, in mass %, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (ΣA) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (ΣB) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0≤SMg/Si<20.0 (Formula 1), 3.0≤Si/ΣB<24.0 (Formula 2), and 26.0≤(Si/ΣB)×(Mg/Si)<375.0 (Formula 3) are satisfied, and in an X-ray diffraction pattern of the surface of the plating layer, a diffraction intensity ratio R1 defined by R1={I(16.18°)+I(32.69°)}/I(27.0°) (Formula 4) satisfies 2.5<R1 (Formula 5) is used.