Wear resistant cast iron alloy with spheroidal graphite separati

Details Wear resistant cast iron alloy with spheroidal graphite separati Wear resistant cast iron alloy with spheroidal graphite separati

1982-11-29

1984-03-06

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 35, 148139, C21D 506, C21D 514

Patent

active

044352263

ABSTRACT:
A wear resistant cast iron alloy having a great strength for the manufacture of wear resistant machine parts having a tempered structure with embedded graphite spheroids formed in very fine form by the decomposition of ledeburite. The alloy has a spheroid number of 300,000 to 900,000/cm.sup.2 and is comprised of 1.5 to 3.0% carbon, 3.0 to 6.0% silicon, 0.1 to 2.0% manganese, 0.05 to 0.5% phosphorus, up to a maximum of 0.15% sulfur, 0.1 to 1.0% chromium, 0 to 3.5% vanadium, 0.1 to 2.5% molybdenum, 0.1 to 3.0% nickel and/or cobalt, 0.1 to 3.5% copper, 0.1 to 2.5% tungsten, 0.1 to 1.0% titanium, niobium and/or tantalum, up to a maximum of 0.15% magnesium, and up to a maximum of 0.15% nitrogen. A method is provided for producing a cast piece of the cast iron alloy.

REFERENCES:
patent: 2970902 (1961-02-01), Alexander et al.
patent: 3600159 (1971-08-01), Moore et al.
patent: 3673004 (1972-06-01), Dumitrescu
patent: 4153477 (1979-05-01), Beyer et al.

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