Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1986-12-22
1988-08-09
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 517, 75 58, C21C 700
Patent
active
047625554
ABSTRACT:
A process for the production of nodular cast iron is disclosed. The process comprises adding magnesium to molten iron and then desulphurizing the melt. Next, the melt is after-treated with a neutral gas. The neutral gas which is introduced into the melt may be Ar, N.sub.2, CO.sub.2, or any combination thereof. The after-treatment with the neutral gas scavenges the melt for nonmetallic inclusions. The after-treatment may be performed by blowing the gas into the melt in a known manner using blowing lances or through a porous plug. In a preferred embodiment, the melt is also carburized by treatment with a gaseous hydrocarbon.
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Gut Karl
Henych Ivo
Georg Fischer Aktiengesellschaft
Rosenberg Peter D.
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