Method for producing a surface-treated and surface-conditioned steel sheet
AssigneeThyssenKrupp Steel Europe AG
InventorsFabian Junge, Burak William Cetinkaya, Jennifer Schulz
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Abstract
The present disclosure relates to a process for producing a surface-treated and surface-finished sheet steel. A sheet steel having a zinc-based coating is provided, wherein zinc grains are distributed within the coating. The surface-treated sheet steel are skin-pass rolled to form embossed regions and unembossed regions on the surface of the sheet steel provided with a zinc-based coating. Skin-pass rolling is performed with a degree of skin-pass greater than 1% in such a way that due to the force exerted by the skin-pass rolling the zinc grains in the embossed region are altered in dimension relative to the zinc grains in the unembossed region.
Claims6
A process for producing a surface-treated and surface-finished sheet steel, wherein the process comprises the steps of:
- providing a sheet steel having a zinc-based coating, wherein zinc grains are distributed within the coating,
- skin-pass rolling the surface-treated sheet steel with a roller having shaping elements to form embossed regions and unembossed regions on the surface of the sheet steel provided with a zinc-based coating,
- wherein the skin-pass rolling is performed with a degree of skin-pass greater than 1% in such a way that due to the force exerted by the skin-pass rolling the zinc grains in the embossed region are altered in dimension to be smaller in size relative to the zinc grains in the unembossed region,
- wherein the zinc-based coating has the following chemical composition in % by weight:
- Al 0.5 to 5.0;
- and
- Mg 0.5 to 5.0;
- residual Zn and unavoidable impurities.
Dependencies are inferred from the claim text.