method to increase the ermuedungsfestigkeit and reduction of rissanfaelligkeit at high temperatures, a werkstuecks from a oxyddisperionsgehaerteten record - number.

摘要

The fatigue strength at high temperatures and during the temperature cycle of a workpiece (2) consisting of an oxide dispersion-hardened nickel-based superalloy is increased by improving the ductility of its surface zone (5) by cold-working the latter at room temperature to a depth of at least 100 mu m by at least an amount which corresponds to a plastic extension of 2%. The susceptibility to cracking at high temperatures is simultaneously reduced. IMAGE