Nitrogen containing additive for strengthening cast iron

Details Nitrogen containing additive for strengthening cast iron Nitrogen containing additive for strengthening cast iron

1975-08-04

1976-08-31

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75130R, 75134M, 75134S, C22C 3000

Patent

active

039778681

ABSTRACT:
A nitrogen containing additive for strengthening cast iron which contains silicon, calcium, nitrogen, at least one of chromium and manganese and the balance being iron and incidental impurities. Addition of said additive to flake graphite cast iron melt results in increase in tensile strength by 7 - 15 kg/mm.sup.2 and hardness by 20 - 60 in Brinell hardness and reduction in depth of chill due to synergistic effect of the alloying elements contained in the additive.

REFERENCES:
patent: 2950187 (1960-08-01), Ototani
patent: 3177072 (1965-04-01), Kaess et al.
patent: 3304175 (1967-02-01), Madsen
patent: 3551139 (1970-12-01), Schokkenbroek
patent: 3717456 (1973-02-01), Percheron et al.
patent: 3891432 (1975-06-01), Nakae

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