Ferroalloy for inoculation of spherulitic graphite irons
First Claim
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1. Ferrosilicon-based ferroalloy for inoculation of spherulitic graphite irons and containing (by weight) from 0.005% to 3% rare earths, 0.005% to 3% bismuth, lead and/or antimony, and 0.3 to 3% calcium, wherein the Si/Fe ratio was greater than 2 and wherein it contains from 0.3% to 3% magnesium.
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Abstract
A ferrosilicon-based ferroalloy for inoculation of spherulitic graphite irons containing (by weight) from 0.005% to 3% rare earths, 0.005% to 3% bismuth, lead and/or antimony, and 0.3% to 3% calcium, and is characterized by the fact that Si/Fe>2 and contains from 0.3 to 3% magnesium. The ferroalloy exhibits improved granulometric stability during storage.
16 Citations
5 Claims
- 1. Ferrosilicon-based ferroalloy for inoculation of spherulitic graphite irons and containing (by weight) from 0.005% to 3% rare earths, 0.005% to 3% bismuth, lead and/or antimony, and 0.3 to 3% calcium, wherein the Si/Fe ratio was greater than 2 and wherein it contains from 0.3% to 3% magnesium.
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Current AssigneeFerropem (Inmobiliaria Espacio SA)
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Original AssigneePechiney Electrometallurgie
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InventorsHerold, Robert, Margaria, Thomas
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Primary Examiner(s)Yee, Deborah
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Application NumberUS08/882,253Time in Patent Office279 DaysField of Search420/578, 420/581US Class Current420/578CPC Class CodesC21C 1/105 Nodularising additive agentsC22C 35/005 based on iron, e.g. ferro-a...
