Method for heat treating iron-nickel-chromium alloy

Patent · Tue Sep 30 00:00:00 EDT 1980

OSTI ID:6504865

Korenko, M K

A method is disclosed for heat treating an age-hardenable iron-nickelchromium alloy to obtain a morphology of the gamma-double prime phase enveloping the gamma-prime phase, the alloy consisting essentially of about 40 to 50% nickel, 7.5 to 14% chromium, 1.5 to 4% niobium, 0.3 to 0.75% silicon, 1 to 3% titanium, 0.1 to 5% aluminum, 0.02 to 1% carbon, 0.002 to 0.0015% boron and the remain substantially all iron. To obtain optimal results, the alloy is cold-worked 20 to 60% followed by heating at 1050/sup 0/C. For 1/2 hour with an air-cool plus heating at 800/sup 0/C. For 2 hours with a furnace cool to 625/sup 0/C. The alloy is then held at 625/sup 0/C. For 12 hours, followed by an air-cool.

• Assignee: Department of Energy
• Patent Number(s): US 4225363
• Application Number: TRN: 81-008527
• OSTI ID: 6504865
• Resource Relation: Patent File Date: Filed date 22 Jun 1978; Other Information: PAT-APPL-917835
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL-CHROMIUM STEELS
HEAT TREATMENTS
ALLOYS
CHROMIUM ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
NICKEL ALLOYS
NICKEL STEELS
STEELS
360101* - Metals & Alloys- Preparation & Fabrication