Invention Grant
- Patent Title: Method for the production of chassis parts from micro-alloyed steel with improved cold formability
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Application No.: US16349883Application Date: 2017-11-15
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Publication No.: US12053815B2Publication Date: 2024-08-06
- Inventor: Ingwer Denks , Stefan Mütze , Christian Pelz
- Applicant: Salzgitter Flachstahl GmbH
- Applicant Address: DE Salzgitter
- Assignee: Salzgitter Flachstahl GmbH
- Current Assignee: Salzgitter Flachstahl GmbH
- Current Assignee Address: DE Salzgitter
- Agency: Henry M. Feiereisen LLC
- Priority: DE 2016121902.9 2016.11.15
- International Application: PCT/DE2017/100969 2017.11.15
- International Announcement: WO2018/091038A 2018.05.24
- Date entered country: 2019-05-14
- Main IPC: B21D53/88
- IPC: B21D53/88 ; C21D8/02 ; C21D9/00 ; C22C38/04 ; C22C38/12 ; C22C38/14 ; C22C38/16 ; C22C38/18 ; C22C38/20 ; C22C38/40 ; C22C38/42 ; C22C38/48 ; C22C38/50 ; C22C38/58

Abstract:
The invention relates to a method for producing a chassis part from micro-alloyed steel, having an improved cold workability of cold-solidified, mechanically separated sheet-metal edges, comprising the following method steps: —providing a hot-rolled strip or a hot-rolled strip sheet of the claimed alloy composition in weight percent, cutting a blank at room temperature and optionally carrying out further punching or cutting operations, —heating exclusively the sheet metal edge regions of the blank, which have been cold-solidified by the cutting or punching operations, to a temperature of at least 700° C. with a dwell time of at most 10 seconds and subsequent cooling with air, —cold forming the blank in one or more steps to form a chassis part at room temperature.
Public/Granted literature
- US20200078853A1 METHOD FOR THE PRODUCTION OF CHASSIS PARTS FROM MICRO-ALLOYED STEEL WITH IMPROVED COLD FORMABILITY Public/Granted day:2020-03-12
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