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:
Oct. 16, 2018
Filed:
Aug. 11, 2014
Applicant:
Vallourec Deutschland Gmbh, Duesseldof, DE;
Inventors:
Assignee:
Vallourec Deutschland GmbH, Düsseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/10 (2006.01); C21D 9/08 (2006.01); C21D 9/14 (2006.01); C21D 1/18 (2006.01); C21D 1/60 (2006.01); B21B 23/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/085 (2013.01); C21D 1/18 (2013.01); C21D 1/60 (2013.01); C21D 8/105 (2013.01); C21D 9/08 (2013.01); C21D 9/14 (2013.01); B21B 23/00 (2013.01); B21B 2261/08 (2013.01);
Abstract
A method for producing a tempered, seamlessly hot-rolled steel pipe includes heating a hollow block to forming temperature and rolling the heated block in a rolling mill to form a pipe with a finished diameter after rolling. Subsequently, the pipe is tempered with appropriate tempering parameters after rolling whereby the diameter of the pipe increases during tempering. The finished diameter of the pipe to be tempered after rolling in the rolling mill is adjusted as a function of a value of the growth in diameter of the pipe during tempering.