After-treating alloy for making nodular iron

Details After-treating alloy for making nodular iron After-treating alloy for making nodular iron

1976-03-30

1978-04-18

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75123L, 75134S, 75170, C22C 3308

Patent

active

040849627

ABSTRACT:
An improvement in a process for making modular 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 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-spheroidizing 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: 2435761 (1949-10-01), Millis
patent: 2711953 (1955-06-01), Vennerholm
patent: 2841489 (1958-07-01), Morrogh
patent: 3033676 (1962-05-01), Cox
patent: 3421887 (1969-01-01), Kusaka

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