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:
Mar. 29, 2022
Filed:
Apr. 18, 2011
Applicants:
James Oliver, Fjärdhundra, SE;
Jan Y. Jonsson, Avesta, SE;
Juho Talonen, Helsinki, FI;
Inventors:
Assignee:
Outokumpu Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/42 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C22C 38/58 (2006.01); C22C 38/42 (2006.01);
U.S. Cl.
CPC ...
C22C 38/02 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C22C 38/001 (2013.01); C22C 38/42 (2013.01); C22C 38/58 (2013.01); C21D 2201/02 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01);
Abstract
The invention relates to a method for manufacturing a ferritic-austenitic stainless steel having good formability and high elongation. The stainless steel is heat treated so that the microstructure of the stainless steel contains 45-75% austenite in the heat treated condition, the remaining microstructure being ferrite, and the measured Mtemperature of the stainless steel is adjusted between 0 and 50° C. in order to utilize the transformation induced plasticity (TRIP) for improving the formability of the stainless steel.