Method for heat treating iron-nickel-chromium alloy

Patent · Fri Jan 01 00:00:00 EST 1982

OSTI ID:864397

Merrick, Howard F.; Korenko, Michael K.

A method for heat treating an age-hardenable iron-nickel-chromium alloy to obtain a bimodal distribution of gamma prime phase within a network of dislocations, 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.degree. C. to 1075.degree. C. for 2-5 minutes, cold-worked about 20% to 60%, aged at a temperature of about 775.degree. C. for 8 hours followed by an air-cool, and then heated to a temperature in the range of 650.degree. C. to 700.degree. C. for 2 hours followed by an air-cool.

• Research Organization: Hanford Engineering Development Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-14-2170
• Assignee: The United States of America as represented by the United States Department of Energy (Washington, DC)
• Patent Number(s): 4,359,349
• Application Number: 06/137049
• OSTI ID: 864397
• Resource Relation: Patent File Date: 1980 Apr 03
• Country of Publication: United States
• Language: English

Related Subjects

method
heat
treating
iron-nickel-chromium
alloy
age-hardenable
obtain
bimodal
distribution
gamma
prime
phase
network
dislocations
consisting
essentially
25
45
nickel
10
16
chromium
element
selected
molybdenum
niobium
titanium
aluminum
remainder
substantially
iron
optimum
results
heated
temperature
1025
degree
1075
2-5
minutes
cold-worked
20
60
aged
775
hours
followed
air-cool
range
650
700
gamma prime
iron-nickel-chromium alloy
consisting essentially
element selected
heat treating
alloy consisting
prime phase
chromium alloy
treating iron-nickel-chromium
age-hardenable iron-nickel-chromium
/148/