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:
Jun. 29, 2010
Filed:
Jan. 04, 2007
Michael P. Brady, Oak Ridge, TN (US);
Bruce A. Pint, Knoxville, TN (US);
Chain-tsuan Liu, Oak Ridge, TN (US);
Philip J. Maziasz, Oak Ridge, TN (US);
Yukinori Yamamoto, Oak Ridge, TN (US);
Zhao P. LU, Oak Ridge, TN (US);
Michael P. Brady, Oak Ridge, TN (US);
Bruce A. Pint, Knoxville, TN (US);
Chain-Tsuan Liu, Oak Ridge, TN (US);
Philip J. Maziasz, Oak Ridge, TN (US);
Yukinori Yamamoto, Oak Ridge, TN (US);
Zhao P. Lu, Oak Ridge, TN (US);
UT-Battelle, LLC, Oak Ridge, TN (US);
Abstract
An austenitic stainless steel displaying high temperature oxidation and creep resistance has a composition that includes in weight percent 15 to 21 Ni, 10 to 15 Cr, 2 to 3.5 Al, 0.1 to 1 Nb, and 0.05 to 0.15 C, and that is free of or has very low levels of N, Ti and V. The alloy forms an external continuous alumina protective scale to provide a high oxidation resistance at temperatures of 700 to 800° C. and forms NbC nanocarbides and a stable essentially single phase fcc austenitic matrix microstructure to give high strength and high creep resistance at these temperatures.