Method for reducing fretting wear between contacting surfaces
AssigneeUnited Technologies Corporation
InventorsRussell A. Beers, Michael F. Machinchick, Allan A. Noetzel
Life of this patent
Estimating the term…
Abstract
A method is taught for protecting the surface of a nickel, cobalt, or titanium alloy from fretting wear by coating said surface with a copper-aluminum alloy.
Claims20
A method for reducing fretting wear between contacting surfaces at a temperature from about 1000.degree. F. to about 1250.degree. F., said method comprising applying to at least one of said contacting surfaces a coating consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, placing said surfaces in contact, and causing relative movement between said surfaces at said temperature.
A method for transmitting forces between contacting components of a jet engine, said method comprising applying to the contacting surfaces of said components an anti-fretting coating consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, placing said coated surfaces in contact, and applying a force to one of said components at a temperature of from about 1000.degree. F. to about 1250.degree. F.
A fretting-fatigue resistant compressor airfoil root for use at a temperature of from about 1000.degree. F. to about 1250.degree. F., comprising an airfoil root of a metal selected from the group consisting of nickel, cobalt, and titanium alloys, the surface thereof having a coating of an alloy consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, said coating being from about 0.1 to about 4 mils thick.
Dependencies are inferred from the claim text.