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:
Apr. 22, 2014
Filed:
Jul. 02, 2010
Applicants:
Laurent Ferrer, Lieusaint, FR;
Philippe Heritier, Clermont-Ferrand, FR;
Inventors:
Laurent Ferrer, Lieusaint, FR;
Philippe Heritier, Clermont-Ferrand, FR;
Assignees:
SNECMA, Paris, FR;
Aubert & Duval, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
C21D 6/02 (2006.01); C21D 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of producing a martensitic steel including 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 a last heat shaping pass of the steel is lower than the solubility temperature of aluminum nitrides in the steel, and a treatment temperature for each potential heat treatment after the last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in the steel.