METHOD OF OBTAINING ARTICLE FROM HIGH-TEMPERATURE STABLE MATERIAL Russian patent published in 2002 - IPC

FIELD: metallurgy. SUBSTANCE: method of obtaining article from material comprising, wt%: C 0.02; Si 0.1; Mn 0.20; S 0.002; P 0.015; Cr 15-18; Ni 40-43; Al 0.1-0.3; Co 0.3; Ti 1.5-1.8; Cu 0.30; Nb 2.8-3.2; Fe stable at high temperatures the balance, includes treating basic blank of ore-nickel superalloy from solid solution with following dispersion hardening in two stages, with additional thermal treatment of blank previously treated from solid solution being provided prior to dispersion hardening. Additional treatment process includes holding at temperature of from 800 C to 850 C, with basic blank being cooled at cooling rate of from 1 to 5 C/min between operations of treatment from solid solution and additional thermal treatment. Method is used for producing rotors of large gas turbines. EFFECT: improved thermal stability and forgeability of alloy. 9 cl, 2 tbl