Patents Assigned to Microalloying International, Inc.
  • Process for the production of vermicular cast iron
    Patent number: 4227924
    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.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: October 14, 1980
    Assignee: Microalloying International, Inc.
    Inventors: Sundaresa V. Subramanian, Debabrata S. Ghosh, John M. Gray, David A. R. Kay, Gary R. Purdy