Method for modifying finished surfaces with the aim of improved surface properties
AssigneeThyssenKrupp Steel Europe AG
InventorsFabian Junge, Vanessa Husien Said, Robin Dohr, Burak William Cetinkaya
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Abstract
The present disclosure relates to a method for producing a semifinished product with modified surface, comprising at least one method step of at least regionally modifying the surface of a coated, skin-pass-rolled, oiled, cleaned metallic steel substrate via low-pressure or atmospheric-pressure plasma treatment of said surface regions with oxygen, argon or a mixture of oxygen and argon as process gas. The present disclosure further relates to the accordingly produced semifinished products and/or flat steel products, optionally formed semifinished products and/or flat steel products, and also to their use.
Claims13
A method for producing a semifinished product with modified surface, comprising the following method steps:
- I. providing a steel substrate with strip or sheet metal,
- II. at least regionally applying a double-sided metallic coating based on zinc by hot-dip coating the substrate from step I,
- III. skin-pass-rolling the metallically coated substrate from step II,
- IV. oiling the skin-pass-rolled, metallically coated substrate from step III,
- V. at least regionally cleaning the substrate from step IV,
- VI. at least regionally modifying the surface of the cleaned substrate from step V via low-pressure or atmospheric-pressure plasma treatment of said surface regions with oxygen, air, argon, forming gas or a mixture of oxygen and argon, oxygen and air as process gas.
Dependencies are inferred from the claim text.