Wear resistant coating for piston rings
AssigneeDana Corporation
InventorsThomas C. Stong, Thomas J. Smith, Peter J. Einberger
Life of this patent
Estimating the term…
Abstract
A wear resistant coating for protecting surfaces undergoing sliding contact is disclosed. The wear resistant coating is applied by high velocity oxygen-fuel (HVOF) deposition of a powdered blend of the coating constituents. The powdered blend includes a nickel-chromium alloy, chromium carbide, and molybdenum. The disclosed coating should find use as a bearing surface on piston rings, cylinder liners, and other components of a power cylinder assembly of an internal combustion engine.
Claims13
A wear resistant coating for protecting a surface, the wear resistant coating applied by high velocity oxygen-fuel deposition of a powder, the powder comprising a blend of:
- about 18 13 wt. % to about 35 43 wt. % of a nickel-chromium alloy;
- about 35 25 wt. % to about 53 64 wt. % chromium carbide;
- and
- about 15 wt. % to about 50 wt. % molybdenum,
- wherein chromium from the nickel-chromium alloy is at least 7.2 wt. % of the blend.
A piston ring comprising an annular body having an outer radial periphery, the outer radial periphery having a wear resistant coating applied by high velocity oxygen-fuel deposition of a powder, the powder comprising a blend of:
- about 18 wt. % to about 35 wt. % of a nickel-chromium alloy;
- about 35 wt. % to about 53 wt. % chromium carbide;
- and about 15 wt. % to about 50 wt. % molybdenum,
- wherein chromium from the nickel-chromium alloy is at least 7.2 wt. % of the blend.
A wear resistant coating for protecting a surface, the wear resistant coating applied by high velocity oxygen-fuel deposition of a powder, the powder comprising a blend of:
- about 28 wt. % of a nickel-chromium alloy;
- about 42 wt. % chromium carbide;
- and
- about 30 wt. % molybdenum.
A piston ring comprising an annular body having an outer radial periphery, the outer radial periphery having a wear resistant coating applied by high velocity oxygen-fuel deposition of a powder, the powder comprising a blend of:
- about 28 wt. % of a nickel-chromium alloy;
- about 42 wt. % chromium carbide;
- and
- about 30 wt. % molybdenum.
Dependencies are inferred from the claim text.