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:
Jul. 05, 2016
Filed:
Sep. 16, 2011
Applicants:
Raju Pillai, Pasadena, TX (US);
Jiinjen A. Sue, The Woodlands, TX (US);
Parul W. Dhall, Houston, TX (US);
Inventors:
Raju Pillai, Pasadena, TX (US);
Jiinjen A. Sue, The Woodlands, TX (US);
Parul W. Dhall, Houston, TX (US);
Assignee:
National Oilwell Varco, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 6/00 (2006.01); C21D 9/00 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); E21B 10/46 (2006.01); B23K 35/30 (2006.01); C21D 1/09 (2006.01); C21D 1/38 (2006.01); B23K 26/34 (2014.01); C22C 38/02 (2006.01); C22C 38/24 (2006.01); C22C 33/02 (2006.01); B23K 35/02 (2006.01); B23K 26/32 (2014.01);
U.S. Cl.
CPC ...
C21D 6/00 (2013.01); B23K 26/32 (2013.01); B23K 26/34 (2013.01); B23K 35/0244 (2013.01); B23K 35/308 (2013.01); C21D 1/09 (2013.01); C21D 1/38 (2013.01); C21D 6/002 (2013.01); C21D 9/00 (2013.01); C22C 33/0257 (2013.01); C22C 38/02 (2013.01); C22C 38/18 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); E21B 10/46 (2013.01); B23K 2203/50 (2015.10); C21D 2201/05 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01);
Abstract
A hardfacing composition composed of an Fe—Cr alloy. The alloy is comprised of 80 wt % iron, about 2 wt % to about 20 wt % Cr, less than 1 wt % Si and less than 1 wt % C. The alloy's microstructure is at least 80 vol % martensite; and less than 20 vol % austenite.