Rocker arm having wear resistant scuffing resistant portion

Details Rocker arm having wear resistant scuffing resistant portion Rocker arm having wear resistant scuffing resistant portion

1988-05-25

1989-10-03

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Rocker

123 9051, F01L 118, F01L 116

Patent

active

048709310

ABSTRACT:
A rocker arm for use in an internal combustion engine. The rocker arm has a portion abutting an opponent mechanical component, and at least the portion is formed of a cast iron consisting of from 2.5 to 3.7 wt % of carbon; from 1.0 to 2.0 wt % of silicon; from 0.5 to 1.0 wt % of manganese; from 10 to 20 wt % of chromium; from 0.3 to 0.7 wt % of nickel; not more than 0.3 wt % of phosphorus; not more than 0.1 wt % of sulfur; and balance iron and impurities; Carbide mainly containing chromium is uniformly precipitated from at least one of pearlitic and martensitic matrix in the cast iron.

REFERENCES:
patent: 2963011 (1960-12-01), Davis et al.
patent: 4360383 (1982-11-01), Takahashi et al.

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