Method for heat treating iron-nickel-chromium alloy

Patent · Thu Dec 31 23:00:00 EST 1981

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
• Country of Publication: United States
• Language: English

Related Subjects

/148/
10
1025
1075
16
2-5
20
25
45
60
650
700
775
age-hardenable
age-hardenable iron-nickel-chromium
aged
air-cool
alloy
alloy consisting
aluminum
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chromium
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cold-worked
consisting
consisting essentially
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dislocations
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essentially
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heated
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iron
iron-nickel-chromium
iron-nickel-chromium alloy
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molybdenum
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nickel
niobium
obtain
optimum
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prime
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treating iron-nickel-chromium