Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1976-02-02
1977-07-05
Satterfield, Walter R.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75130BB, 148 35, C22C 3300
Patent
active
040337669
ABSTRACT:
A method and apparatus for producing modified grey iron, and particularly nodular cast iron, is disclosed. The apparatus comprises refractory elements including an inclined flow course for continuous reception of molten grey iron, a V-shaped inclined receptacle interposed in said course into which a predetermined supply of modifying agent, such as magnesium, is injected to react with said iron, and means for controlling the egress of iron from the receptacle in order to sequentially stage the build-up and dissipation of a pool of iron in said receptacle facilitating chemical reactions and thorough mixing for attaining and improving the homogeneity of the modified iron elements. The product and composition uniquely is characterized by about 3.5 carbon, by weight, 2.5% silicon, 0.2-0.9Mn sulfur no greater than 0.015%, the remainder being essentially iron; the composition is devoid of carbide and dross or slag and has a graphite nodule count of at least 400 per square millimeter in a 1/2 inch section.
REFERENCES:
patent: 2867555 (1959-01-01), Curry
patent: 3193383 (1965-07-01), Butler
patent: 3598576 (1971-08-01), Moore et al.
patent: 3726670 (1973-04-01), Kusaka
Cole Gerald S.
Kovacs Bela V.
Sensoli Robert A.
Smartt Herschel B.
Ford Motor Company
Malleck Joseph W.
Satterfield Walter R.
Zerschling Keith L.
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