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. 30, 2016
Filed:
Jul. 16, 2013
Applicants:
Snecma, Paris, FR;
Aubert & Duval, Paris, FR;
Inventors:
Laurent Ferrer, Lieusaint, FR;
Philippe Heritier, Clermont Ferrand, FR;
Assignees:
SNECMA, Paris, FR;
AUBERT & DUVAL, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/06 (2006.01); C22C 38/52 (2006.01); F16C 3/02 (2006.01); C21D 1/06 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 9/28 (2006.01); C22C 38/08 (2006.01); C22C 38/40 (2006.01);
U.S. Cl.
CPC ...
F16C 3/02 (2013.01); C21D 1/06 (2013.01); C21D 1/18 (2013.01); C21D 6/00 (2013.01); C21D 6/001 (2013.01); C21D 6/004 (2013.01); C21D 9/28 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/40 (2013.01); C22C 38/52 (2013.01); C21D 2211/008 (2013.01);
Abstract
The invention relates to a method of producing a martensitic steel comprising a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of the last heat shaping pass of said steel is lower than the solubility temperature of the aluminum nitrides in the steel, and the treatment temperature for each potential heat treatment after said last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in said steel.