Process for producing cast iron castings with a vermicular graphite structure

US4544407A · kind A · utility

Assignee

• George Fischer AG · CH

Inventors

• Reinhold Linkert · Hilzingen, DE
• Emil Becker · Flurlingen, CH
• Horst Hoffmann · Pentling, DE

Key dates

• Filing date: Nov 29, 1982
• Grant date: Oct 1, 1985
• Expiry date: Nov 29, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C37/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Cast iron with a vermicular graphite structure is produced by a process which involves the steps of determining the ratio of magnesium to sulphur in the melt and then adjusting the value of such ratio to between about 0.8 and 2.5.