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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.:

US 12053815 B1

PDFFull Text
Date of Patent:
Aug. 06, 2024

Filed:

Nov. 15, 2017

Method for the production of chassis parts from micro-alloyed steel with improved cold formability

Applicant:

Salzgitter Flachstahl Gmbh, Salzgitter, DE;

Inventors:

Ingwer Denks, Wolfenbüttel, DE;

Stefan Mütze, Peine, DE;

Christian Pelz, Wolfenbüttel, DE;

Assignee:

Salzgitter Flachstahl GmbH, Salzgitter, DE;

Attorney:

Henry M. Feiereisen LLC

Primary Examiner:

Adil A Siddiqui

Int. Cl.
CPC ...
B21D 53/88 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/40 (2006.01); C22C 38/42 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01);
U.S. Cl.
CPC ...
B21D 53/88 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 9/0068 (2013.01); C22C 38/04 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/20 (2013.01); C22C 38/40 (2013.01); C22C 38/42 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/58 (2013.01); C21D 2221/00 (2013.01);
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.

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