Invention Grant
- Patent Title: Method for producing a steel strip with improved bonding of metallic hot-dip coatings
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Application No.: US16967619Application Date: 2019-01-30
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Publication No.: US11702729B2Publication Date: 2023-07-18
- Inventor: Marc Debeaux , Nils Köpper
- Applicant: Salzgitter Flachstahl GmbH
- Applicant Address: DE Salzgitter
- Assignee: SALZGITTER FLACHSTAHL GMBH
- Current Assignee: SALZGITTER FLACHSTAHL GMBH
- Current Assignee Address: DE Salzgitter
- Agency: Gardner, Linn, Burkhart & Ondersma
- Priority: DE 2018102624.2 2018.02.06
- International Application: PCT/EP2019/052191 2019.01.30
- International Announcement: WO2019/154680A 2019.08.15
- Date entered country: 2020-08-05
- Main IPC: C23C8/10
- IPC: C23C8/10 ; C23C2/06 ; C23C2/40 ; C21D9/56 ; C21D9/573 ; C22C38/38 ; C22C38/02 ; C22C38/06

Abstract:
A method for producing a steel strip containing, in addition to iron as the main component and unavoidable impurities, one or more of the following oxygen-affine elements in wt. %: Al: more than 0.02, Cr: more than 0.1, Mn: more than 1.3 or Si: more than 0.1, where the surface of the steel strip is cleaned, oxidation-treated and annealed. The treated and annealed steel strip is subsequently coated with a hot-dip coat. In order to be less cost-intensive and to achieve uniform, reproducible adhesion conditions for the coat, the steel strip is oxidation-treated prior to the annealing at temperatures below 200° C., where on the surface of the steel strip, with the formation of oxides with iron from the steel strip, an oxide layer is formed, which contains iron oxide and is reduction-treated during the course of the annealing under a reducing atmosphere to achieve a surface consisting substantially of metallic iron.
Public/Granted literature
- US20210156018A1 METHOD FOR PRODUCING A STEEL STRIP WITH IMPROVED BONDING OF METALLIC HOT-DIP COATINGS Public/Granted day:2021-05-27
Information query
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