Thermostable and corrosion-resistant cast nickel-chromium alloy

US10724121B2 · kind B2 · utility

Assignee

• Schmidt + Clemens GmbH + Co. KG · DE

Inventors

• Rolf Kirchheiner · Iserlohn, DE
• Dietlinde Jakobi · Neunburg vorm Wald, DE
• Petra Becker · Neunburg vorm Wald, DE
• Ricky Durham · Neunburg vorm Wald, DE

Key dates

• Filing date: Aug 6, 2018
• Grant date: Jul 28, 2020
• Expiry date: Sep 18, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C19/058
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A nickel-chromium casting alloy comprising, in weight percent, up to 0.8% of carbon, up to 1% of silicon, up to 0.2% of manganese, 15 to 40% of chromium, 0.5 to 13% of iron, 1.5 to 7% of aluminum, up to 2.5% of niobium, up to 1.5% of titanium, 0.01 to 0.4% of zirconium, up to 0.06% of nitrogen, up to 12% of cobalt, up to 5% of molybdenum, up to 6% of tungsten and from 0.01 to 0.1% of yttrium, remainder nickel, has a high resistance to carburization and oxidation even at temperatures of over 1130° C. in a carburizing and oxidizing atmosphere, as well as a high thermal stability, in particular creep rupture strength.