Internal combustion valve having an iron based hard-facing alloy contact surface
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United States of America Patent
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Jul 11, 1995
Grant Date -
N/A
app pub date -
Dec 19, 1994
filing date -
Dec 22, 1993
priority date (Note) -
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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 carbon: 1.3 to 2.0 weight percent; chromium: 19 to 23 weight percent; molybdenum: 8 to 11 weight percent; nickel: 17 to 21 weight percent; manganese: 6 to 13 weight percent; silicon: less than 0.5 weight percent; oxygen: less than 0.06 weight percent; balancing iron and inevitable impurities.
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