Highly corrosion and wear resistant chilled casting

US6165288A · kind A · utility

Assignee

• KSB Aktiengesellschaft · DE

Inventors

• Anja Dwars · Wendelstein, DE
• Heinz Koeper · Pegnitz, DE
• Wolfgang Prechtl · Sulzbach-Rosenberg, DE
• Joerg Schroepfer · Erlangen, DE
• Hermann Tischner · Pegnitz, DE

Key dates

• Filing date: Nov 18, 1996
• Grant date: Dec 26, 2000
• Expiry date: Nov 18, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12799
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A chilled casting is characterized by high corrosion resistance in aggressive media and by a wear resistance that approaches that of commercially available types of chilled casting. The disclosed chilled casting contains 36 to 46% by weight Cr, 5 to 12% weight Ni, 2 to 6% by weight Mo, up to 3% by weight Cu, up to 0.2% by weight N, up to 1.5% by weight Si, up to 1.5% by weight Mn and 1.4 to 1.9% by weight C, the remainder being Fe and impurities due to the production process. The chilled casting further contains 20 to 40% by volume austenite, 20 to 40% by volume ferrite and 20 to 40% by volume carbides having a lattice structure.