Process for increasing the room temperature ductility of an oxide dispersion hardened nickel base superalloy article having a coarse columnar grain structure directionally oriented along the length

摘要

method for increasing the ductility of a broad lu00e4ngsu00adgerichteten stengelfu00f6rmigen kristalliten present making the part from a oxyddispersionsgehu00e4rteten record - superu00adlegierung at room temperatureby the previously zonengeglu00fchte workpiece under argonatmosphu00e4re during 1 / 2 h to 5 h of a lu00f6sungsglu00fchung in the temperature range between 1160 and 1280 degrees and then a targeted cooling with a speed of 0.1 degrees c / min to 5 oc / min up to a temperature of 500 to 7 00 c is subjected to. then, the werku00adstu00fcck to air down to room temperature.preferred specific cooling rate: approximately 0.5 degrees / minutes.