Electrodes for Repairing Power Engineering Equipment Made from Creep Resisting Steel

摘要

It has been recommended that defects in casing components belonging to power engineering equipment be repaired with austenitic electrodes in cases where it is impossible to use pre-heating and post-weld heat treatment. In order to prevent the formation of a structure inhomogeneity in the fusion zone between the austenitic and non-austenitic metal the nickel content in the austenitic metal must not be less than 45%. The E.O. Paton Institute of Electric Welding has developed electrodes, type ANZhR-1 (C less than or equal to 0.1, Si less than or equal to 0.35, Mn 1.5 to 2.5, Cr 23.0 to 26.0, Ni base, Mo 8.5 to 11.0, Ti 0.05, S less than or equal to 0.015, P less than or equal to 0.02), which ensure the formation of a high-nickel austenitic structure in the metal without carbide-forming elements; during welding, the above mentioned structure inhomogeneity in the fusion zone is prevented when heating the weld joint up to 600 exp 0 C. 9 references, 6 figures, 2 tables. (ERA citation 10:022885)