Arc electrode

US4766349A · kind A · utility

Assignee

• Aga Aktiebolag · SE

Inventors

• Jan-Olof Johansson · Uppsala, SE
• Jan-Erik Andersson · Tumba, SE
• Tomasz Niklewski · Stockholm, SE
• Lars E. Edshammar · Stockholm, SE

Key dates

• Filing date: Jun 5, 1986
• Grant date: Aug 23, 1988
• Expiry date: Jun 5, 2006

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05H1/3442
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An electrode for electric arc processes composed of a water-cooled holder (1) into which is fitted a case hardened of diffusion coated insert of zirconium or hafnium. The diffusion zone (5) consists of carbide, nitride, boride or silicide, compounds with very high melting points that will supress reactions between the holder and the insert that cause deterioration of the electrode.