Process of manufacturing cast tungsten carbide spheres

US5089182A · kind A · utility

Inventors

• Eberhard Findeisen · Eisenach, DE
• Klaus Frank · Hannover, DE
• Wilfried Becker · Düsseldorf, DE
• Fritz Muller · Ingelfingen, DE

Key dates

• Filing date: Oct 16, 1989
• Grant date: Feb 18, 1992
• Expiry date: Oct 16, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B32/949
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

To develop a process for manufacturing cast tungsten carbide spheres, without any content of spattering material, as solid spheres with a bulk weight of 0.5-11.5 g/cm.sup.3 for cast tungsten carbide spheres from a screen fraction, and with a granular distribution of 40 .mu.m to 2,000 .mu.m, tungsten carbide is heated to about 150.degree.-300.degree. C. above the melting point, and then the cast tungsten carbide is smelted and granulated in stationary inert gas.