Welding compositions for improved mechanical properties in the welding of cast iron

摘要

A weld deposit produced from a coated welding electrode for use in welding cast irons is provided by the present invention. Preferably, in one form of the present invention, the weld deposit composition comprises between approximately 54% and approximately 60% Nickel, between approximately 3.5% and approximately 5.5% Manganese, and between approximately 0.9% and approximately 1.4% Carbon. The weld deposit is preferably formed by using a coated welding electrode having a coating composition between approximately 0.3% and approximately 4.0% Magnesium and rare earth metals and oxides. The resulting weld deposit exhibits improved ductility, fracture toughness, and resistance to cracking.

主权项

1. A weld deposit produced from a coated welding electrode for use in welding cast irons, the weld deposit composition comprising:
between 54% and 60% nickel; between 3.5% and 5.5% manganese; between 0.9% and 1.4% carbon, the carbon being present as nodular graphite; approximately 1.0% silicon; approximately 0.03% sulfur; approximately 0.2% copper; approximately 0.5% aluminum; and between approximately 33.0% and approximately 41.5% iron; wherein the coated welding electrode comprises a coating composition comprising between 0.3% and 4.0% magnesium and rare earth metals and oxides; wherein a percentage of nickel in the weld deposit composition is greater than a percentage of nickel in a welding electrode core from which the weld deposit is formed.