Steel sheet coated with a metallic coating based on aluminum and comprising titanium
AssigneeArcelorMittal
InventorsChristian Allely, Tiago Machado Amorim, Beril Corlu, Joost De Strycker
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Abstract
A steel sheet coated with a metallic coating is provided. The coating includes from 1.0 to 22.0% by weight of zinc, from 0.1 to 1.0% by weight of titanium, from 1.6 to 15.0% by weight of silicon, below 0.5% by weight of magnesium, below 0.05% by weight of La or Ce or both, below 0.2% by weight of Sn and optionally, less than 0.3% by weight of additional elements chosen from Sb, Pb, Ca, Mn, Cr, Ni, Zr, In, Hf or Bi. A balance of the coating includes aluminum and optionally unavoidable impurities and residual elements. A microstructure of the coating does not include Al—Zn binary phases. A coated part is also provided.
Claims25
A steel sheet coated with a metallic coating, the metallic coating comprising:
- 5.0 to 22.0% by weight of zinc;
- 0.1 to 1.0% by weight of titanium;
- 1.6 to 15.0% by weight of silicon;
- less than 0.5% by weight of magnesium;
- less than 0.05% by weight of La;
- less than 0.05% by weight of Ce;
- less than 0.2% by weight of Sn;
- and
- a balance of the composition being aluminum and unavoidable impurities and residual elements;
- and
- a microstructure of the coating does not comprise Al—Zn binary phases.
A part comprising:
- a steel sheet coated with a metallic coating, the metallic coating comprising:
- 5.0 to 22.0% by weight of zinc;
- 0.1 to 1.0% by weight of titanium;
- 1.6 to 15.0% by weight of silicon;
- less than 0.5% by weight of magnesium;
- less than 0.05% by weight of La;
- less than 0.05% by weight of Ce;
- less than 0.2% by weight of Sn;
- and
- a balance of the composition being aluminum and unavoidable impurities and residual elements;
- and
- a microstructure of the coating does not comprise Al—Zn binary phases;
- the steel sheet subject to hot-forming or cold-forming or both to form the part.
Dependencies are inferred from the claim text.