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:
Aug. 28, 2012
Filed:
Oct. 16, 2009
Hubertus Giefers, Paderborn, DE;
Karsten Bake, Salzkotten, DE;
Andreas Frehn, Delbrueck, DE;
Alexander Redenius, Braunschweig, DE;
Uwe Diekmann, Paderborn, DE;
Hubertus Giefers, Paderborn, DE;
Karsten Bake, Salzkotten, DE;
Andreas Frehn, Delbrueck, DE;
Alexander Redenius, Braunschweig, DE;
Uwe Diekmann, Paderborn, DE;
Benteler Automobiltechnik GmbH, Paderborn, DE;
Abstract
The present invention, among other things, relates to a method for producing a workpiece by press hardening a semi-finished product, which is distinguished by the fact that the semi-finished product consists of a steel which has a high content of silicon of at least 0.9 wt. %, with a simultaneously small content of manganese of less than 0.9 wt. %, a small carbon content of less than 0.25 wt. %, and a high chromium content of more than 1.20 wt. %, and which by heating is brought to a state in which the structure of the steel that is used is at least partially transformed to austenite, also optionally fully transformed to austenite, and the thus-heated semi-finished product is hot shaped so that after the hot deformation shaping, a structure is present in the workpiece that has a complex phase structure with predominantly martensite and ferrite fractions. In addition, a workpiece is described, which is produced according to this method, as well as uses of such a workpiece.