Process of making nodular iron and after-treating alloy utilized

Details Process of making nodular iron and after-treating alloy utilized Process of making nodular iron and after-treating alloy utilized

1974-05-20

1976-05-11

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 58, 75130A, C22C 3308

Patent

active

039559734

ABSTRACT:
An improvement in a process for making nodular iron is disclosed. Prior to casting, an iron melt which has previously been contacted with a graphite-spheroidizing agent is further contacted with an after-treating alloy agent containing from about 0.8 to about 1.8 weight percent magnesium. Magnesium utilization in the pre-casting step is unusually high and the amount of graphite-spherodizing agent can be substantially reduced without detrimentally affecting the metallurgical or physical properties of the resulting nodular iron product. The after-treating alloy agent is also claimed.

REFERENCES:
patent: 2841490 (1958-07-01), Steven
patent: 3661566 (1972-05-01), Percheron

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