Method for heat treating iron-nickel-chromium alloy

Patent · Thu Apr 03 00:00:00 EST 1980

OSTI ID:6607771

A method is described for heat treating an age-hardenable iron-nickel-chromium alloy to obtain a morphology of the gamma-double prime phase enveloping the gamma-prime, the alloy consisting essentially of about 25 to 45% nickel, 10 to 16% chromium, 1.5 to 3% of an element selected from the group consisting of molybdenum and niobium, about 2% titanium, about 3% aluminum, and the remainder substantially all iron. To obtain optimum results, the alloy is heated to a temperature of 1025 to 1075/sup 0/C for 2 to 5 minutes, cold-worked about 20 to 60%, aged at a temperature of about 775/sup 0/C for 8 hours followed by an air-cool, and then heated to a temperature in the range of 650 to 700/sup 0/C for 2 hours followed by an air-cool.

• DOE Contract Number: EY-76-C-14-2170
• Assignee: Dept. of Energy
• OSTI ID: 6607771
• Country of Publication: United States
• Language: English

Related Subjects

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