Process for the production of vermicular cast iron

Details Process for the production of vermicular cast iron Process for the production of vermicular cast iron

1978-05-18

1980-10-14

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 53, 75123CB, 75123E, C22C 3308

Patent

active

042279240

ABSTRACT:
Process for producing vermicular cast iron comprising: (i) forming a near eutectic melt having a sulfur content preferably less than about 0.025% by weight; (ii) admixing at least one rare earth-containing additive with said melt to form stable rare earth oxysulfides thereby reducing and maintaining the Henrian sulfur activity in the melt at between about 0.004 and 0.035; and (iii) thereafter, allowing said melt to solidify.

REFERENCES:
patent: 3336118 (1967-08-01), Newitt
patent: 3765876 (1976-10-01), Moore
patent: 3816103 (1974-06-01), Link

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