Manufacturing process of vermicular graphic cast-irons through double modification

US4246026A · kind A · utility

Assignee

• Institutul De Cercetare Stiintifica, Inginerie Tehnologica Si Proiectare Pentru Sectoare Calde · RO

Inventors

• Doru M. Stefanescu · Tuscaloosa, US
• Lucian Dinescu · Bucharest, RO
• Stefan Craciun · Bucharest, RO
• Ioan Cristea · Bucharest, RO

Key dates

• Filing date: Sep 12, 1979
• Grant date: Jan 20, 1981
• Expiry date: Sep 12, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21C1/105
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A two-stage method of making vermicular graphite cast iron in which a first alloy is introduced into the ladle into which the iron is cast and then the vermicular graphite level is measured. A second alloy of a compacting or anticompacting nature is then added to ensure a final vermicular graphite level of at least 85% of the total graphite.