The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2014
Filed:
Jul. 12, 2010
Dominique Spehner, Sedan, FR;
Ronald Kefferstein, Saint Mitre les Remparts, FR;
Pascal Drillet, Rozerieulles, FR;
Dominique Spehner, Sedan, FR;
Ronald Kefferstein, Saint Mitre les Remparts, FR;
Pascal Drillet, Rozerieulles, FR;
ArcelorMittal France, Saint Denis, FR;
Abstract
The invention relates to a process for making a hot stamped coated steel sheet product, comprising the steps of pre-coating a steel strip or sheet with aluminum—or aluminum alloy, cutting said pre-coated steel strip or sheet to obtain a pre-coated steel blank, heating the blank in a furnace preheated to a temperature and during a time defined by diagram according to thickness, at a heating rate Vbetween 20 and 700° C. comprised between 4 and 12° C./s and at a heating rate V' between 500 and 700° C. comprised between 1.5 and 6° C./s, to obtain a heated blank; then transferring said heated blank to a die, hot stamping the heated blank in the die obtain a hot stamped steel sheet product, cooling at a mean rate Vbetween the exit of the heated blank from the furnace, down to 400° C., of at least 30° C./s.