Invention Grant
- Patent Title: Flat steel product with an Al-coating, method for producing the same, steel component and method for producing the same
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Application No.: US15509167Application Date: 2015-08-26
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Publication No.: US10669603B2Publication Date: 2020-06-02
- Inventor: Janko Banik , Ulrich Etzold , Norbert Rössler , Manuela Ruthenberg , Thiemo Wuttke
- Applicant: ThyssenKrupp Steel Europe AG , ThyssenKrupp AG
- Applicant Address: DE Duisburg DE Essen
- Assignee: ThyssenKrupp Steel Europe AG,ThyssenKrupp AG
- Current Assignee: ThyssenKrupp Steel Europe AG,ThyssenKrupp AG
- Current Assignee Address: DE Duisburg DE Essen
- Agency: The Webb Law Firm
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1ba89ed8
- International Application: PCT/EP2015/069550 WO 20150826
- International Announcement: WO2016/034476 WO 20160310
- Main IPC: C21D8/00
- IPC: C21D8/00 ; C21D9/00 ; C23C2/40 ; C23C2/12 ; C22C38/32 ; C22C38/22 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; C22C38/28 ; C22C21/02 ; C21D1/673 ; C23C2/26 ; C23C30/00 ; C23C28/00 ; C23C2/02 ; C23C2/06 ; C22C21/08 ; C22C21/12 ; C22C21/16 ; C22C21/06 ; C21D8/02 ; B32B15/04 ; B32B15/18 ; B32B15/01

Abstract:
A flat steel product for hot forming may be produced from a steel substrate that includes a steel comprising 0.1-3% by weight Mn and up to 0.01% by weight B, along with a protective coating that is applied to the steel substrate. The protective coating may be based on Al and may contain up to 20% by weight of other alloy elements. Also disclosed are methods for producing such flat steel products, steel components, and methods for producing steel components. Absorption of hydrogen is minimized during heating necessary for hot forming. This is achieved at least in part through an alloy constituent of 0.1-0.5% by weight of at least one alkaline earth or transition metal in the protective coating, wherein an oxide of the alkaline earth or transition metal is formed on an outer surface of the protective coating during hot forming of the flat steel product.
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