Title: Method for heat treatment of high-temp. resistant alloy material and heat treated material
Application Number: 97114396 Application Date: 1997.11.01
Publication Number: 1199103 Publication Date: 1998.11.18
Approval Pub. Date: 2002.03.06 Granted Pub. Date: 2002.03.06
International Classifi-cation: C22F1/10
Applicant(s) Name: Asea Brown Boveri AG Address:
Inventor(s) Name: Werner Balbach;Gunnar Haerkegard;Reiner Redecker
Attorney & Agent: wang jingchao
Abstract:
    A heat treatment process for material bodies made of a high-temperature-resistant iron-nickel superalloy of the type IN 706 comprises the following steps: solution annealing at approximately 965 to 995 DEG C. for 5 to 20 hours, stabilization annealing at approximately 775 to 835 DEG C. for 5 to 100 hours, and precipitation hardening at 715 to 745 DEG C. for 10 to 50 hours and at 595 to 625 DEG C. for 10 to 50 hours. A heat-treated material body of this kind, made of a high-temperature-resistant iron-nickel superalloy of the type IN 706 exhibits a crack growth rate of less than 0.05 mm/h and/or exhibits a minimum elongation of 2.5% without cracks at a constant strain rate of 0.05%/h and a temperature of 600 DEG C.
Time: 4