Patent · US Expired

Internal combustion valve having an iron based hard-facing alloy contact surface

US5431136A · kind A · utility

15Cited by
4References
2Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 19, 1994
Grant dateJul 11, 1995
Priority date—
Expiry dateDec 19, 2014

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC22C38/58
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

There is provided an internal combustion engine valve having a body, a head, and a contact surface disposed on said head adapted to periodically enter into gas-sealing engagement with a valve seat, said contact surface being formed in metal deposit welded to said valve head, the composition of said metal deposit being Al and B free, and measured at said contact surface, consisting essentially of PA0 carbon: 1.3 to 2.0 weight percent; PA0 chromium: 19 to 23 weight percent; PA0 molybdenum: 8 to 11 weight percent; PA0 nickel: 17 to 21 weight percent; PA0 manganese: 6 to 13 weight percent; PA0 silicon: less than 0.5 weight percent; PA0 oxygen: less than 0.06 weight percent; balancing iron and inevitable impurities.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.