Title: Process for the production of vermicular cast iron

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.

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Inventors: Subramanian, Sundaresa V. (Hamilton, CA, US)
Ghosh, Debabrata S. (Ottowa, CA, US)
Gray, John M. (Stamford, CT, US)
Kay, David A. R. (Burlington, CA, US)
Purdy, Gary R. (Hamilton, CA, US)

Application Number: 907005
Filing Date: 1978-05-18
Publication_date: 1980-10-14
Assignee: Microalloying International, Inc. (Stamford, CT)
Primary Class(es): 420/30 75/560, 148/321, 164/58.1
Other Classes:
US Patent Ref:

3336118	Aug, 1967	Newitt	75/53.
3765876	Oct, 1976	Moore	75/130.
3816103	Jun, 1974	Link	75/53.

Other Refs:
Primary Examiner: Rosenberg, P. D.
Assistant Examiner:
Attorney: Kramer; Barry