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. 13, 2010
Filed:
Sep. 09, 2004
Clark Vantine Cooper, Glastonbury, CT (US);
Krassimir G. Marchev, Sudbury, MA (US);
Bill C. Giessen, Cambridge, MA (US);
Raymond C. Benn, Madison, CT (US);
Edward H. Bittner, Madison, CT (US);
Harsh Vinayak, Meriden, CT (US);
Clark VanTine Cooper, Glastonbury, CT (US);
Krassimir G. Marchev, Sudbury, MA (US);
Bill C. Giessen, Cambridge, MA (US);
Raymond C. Benn, Madison, CT (US);
Edward H. Bittner, Madison, CT (US);
Harsh Vinayak, Meriden, CT (US);
Sikorsky Aircraft Corporation, Stratford, CT (US);
Abstract
A surface processing method and power transmission component includes transforming a surface region of a metal alloy into a hardened surface region at a temperature that is less than a heat treating temperature of the metal alloy. The metal alloy includes about 11.1 wt % Ni, about 13.4 wt % Co, about 3.0 wt % Cr, about 0.2 wt % C, and about 1.2 wt % Mo which reacts with the C to form a metal carbide precipitate of the form MC. The surface processing temperature, vacuum pressure, precursor gas flow and ratio, and time of processing are controlled to provide a desirable hardened surface region having a gradual transition in nitrogen concentration.