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. 24, 2014
Filed:
Dec. 15, 2006
Tapas K. Mukherji, Shelton, CT (US);
Michael E. Dandorph, Shelton, CT (US);
Bruce D. Hansen, Shelton, CT (US);
Edward J. Karedes, Cheshire, CT (US);
Tapas K. Mukherji, Shelton, CT (US);
Michael E. Dandorph, Shelton, CT (US);
Bruce D. Hansen, Shelton, CT (US);
Edward J. Karedes, Cheshire, CT (US);
Sikorsky Aircraft Corporation, Stratford, CT (US);
Abstract
A surface processing method includes the step of increasing a surface hardness of a metal having a nominal composition that includes about 0.21-0.25 wt % carbon, about 2.9-3.3 wt % chromium, about 11-12 wt % nickel, about 13-14 wt % cobalt, about 1.1-1.3 wt % molybdenum, and a balance of iron from a first hardness to a second hardness. For example, the method is used to produce a surface-hardened component that includes a core section having a first hardness between about 51 HRand 55 HRand a case section having a second hardness that is greater than the first hardness.