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:
Feb. 07, 1995
Filed:
Aug. 26, 1993
Emmanuel Kerrand, Villabe, FR;
Vincent Le Castrec, Charenton le Pont, FR;
Didier Boucachard, Belfort, FR;
European Gas Turbines SA, Paris, FR;
Abstract
A coating for a part made of a nickel alloy of the following type: Cr: 15% to 20%, Co: 8% to 20%, Mo: 1.5% to 4%, Ti: 3% to 5%, Al: 3% to 3.5%, W: .ltoreq.3.8%, Fe: .ltoreq.1.2%, Nb: .ltoreq.0.9%, C: .ltoreq.0.1%, B: .ltoreq.0.01%, and Ta: .ltoreq.2.8%, the remainder being Ni, the coating having hardness of about 400 HV and including a plurality of layers (5', 5') of a wear-resistant cobalt-containing material of the following type: C: <1%, Cr: 26% to 30%, W: 18% to 21%, Ni: 4% to 6%, V: 0.75% to 1.15%, Fe: .ltoreq.3%, Mn .ltoreq.1%, Si: .ltoreq.1%, and B: .ltoreq.0.05%, the remainder being Co, said coating being characterized in that a buffer layer (5) is disposed between the part and the cobalt-containing layers (5', 5'), which buffer layer is made from a pre-alloyed powder having the following composition: Si: 0.7% to 2.9%, Cr: 11% to 26%, Fe: 0.5% to 3%, C: 0.35% to 0.85%, B: 0.3% to 1.35%, Ni: 20% to 69%, W: 3.6% to 16.8%, Mn .ltoreq.0.8%, and Co: 7% to 41.5%. The low-hardness region is reduced or is omitted.