Claims
- 1. A nodularizing agent in unitary discrete form suitable for placement in an interior recess of a mold gating system, said agent having a solid impervious brittle body consisting essentially of an iron-silicon base alloyed with 5-15% by weight of nodularizing elements effective to cause the formation of spheroidal graphite during solidification of cast iron, said body having substantially flat side and bottom walls to mate snugly with said mold gating system for the substantial exclusion of molten metal therebetween.
- 2. The agent as in claim 1, in which the thickness of said sheet is in the range of 0.5-4.0 inches while being devoid of segregation or oxides within the interior thereof.
- 3. The agent as in claim 1, which is essentially constituted of magnesium ferrosilicon having less than 0.2% impurities and containing between 5-15% magnesium.
- 4. A nodularizing agent in sheet form having a thickness in the range of 0.5 - 4.0 inches and having a grid pattern of V-shaped perforations arranged throughout boty upper and lower surfaces of said sheet, said V-shaped perforations penetrating said sheet thickness to define fracture planes no less than 40% of the thickness of said sheet, said sheet form having a solid impervious brittle body consisting essentially of an iron-silicon base alloyed with 5-15% by weight of nodularizing elements selected from the group consisting of magnesium, cerium, calcium and rare earth metals, said nodularizing elements being effective to cause the formation of spheroidal graphite during solidification of cast iron, said sheet form being severable into discrete blocks along said fracture planes whereby said block may be employed as premeasured additives to be placed into an interior recess of a mold gating system previously preformed to snugly accept said block.
Parent Case Info
This is a division of application Ser. No. 606,908, filed Aug. 22, 1975.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3383202 |
Lynch |
May 1968 |
|
3717456 |
Percheron |
Feb 1973 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
606908 |
Aug 1975 |
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