Gray iron casting composition with controlled iron-chromium carb

Details Gray iron casting composition with controlled iron-chromium carb Gray iron casting composition with controlled iron-chromium carb

1975-07-14

1976-08-31

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75123CB, 75126Q, 148 35, C22C 3706, C22C 3710

Patent

active

039778673

ABSTRACT:
A gray iron casting particularly suitable for automotive camshafts or the like includes, by weight, 3.10 to 3.45 percent carbon, 1.60 to 1.70 percent silicon, 0.60 to 0.80 percent chromium, 0.40 to 0.90 percent manganese, and the balance iron with residual impurities individually limited to less than 0.40 percent to provide a relatively high, yet closely controlled iron-chromium carbide content of from 20 to 40 percent in a preselected region thereof for improved resistance to wear, with the remainder being relatively more pearlitic and graphitic for increased strength.

REFERENCES:
patent: 1898390 (1932-01-01), Pfeil
patent: 1910034 (1933-05-01), Mitchell
patent: 1984474 (1934-12-01), Good
patent: 2145757 (1939-01-01), Ervin
patent: 2579452 (1951-12-01), Eckman et al.
patent: 2684900 (1954-07-01), Webbere
patent: 3273998 (1966-09-01), Knoth

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