Method of manufacturing compacted graphite cast iron

US5639420A · kind A · utility

Assignee

• AB Volvo · SE

Inventors

• Bertil Sander
• Berndt Gyllensten · Skövde, SE
• Lars-Eric Thorsten Uhr · Skövde, SE
• Per Inge Dahlof · Skövde, SE
• Olov Skargård · Skövde, SE
• Sven-Eric Dahlberg · Skövde, SE

Key dates

• Filing date: Jan 28, 1993
• Grant date: Jun 17, 1997
• Expiry date: Jan 28, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21C1/08
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of manufacturing compacted graphite cast iron, in which graphite modifying alloying agents, in the form of a so-called treatment alloy, are added to low-sulphurous molten cast iron. The treatment alloy is added to the molten iron by being sprayed into a jet of the molten iron as the latter is being discharged from a casting furnace. A dosed amount of treated iron is maintained for a predetermined period of time inside a casting box for homogenization and slag flotation, whereupon it is poured into a casting mold.