Method for heat treating iron-nickel-chromium alloy

Merrick, Howard F; Korenko, Michael K

Title: Method for heat treating iron-nickel-chromium alloy

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Abstract

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.

Inventors:

Merrick, Howard F ^[1]; Korenko, Michael K ^[2]

Suffern, NY
Rockville, MD

Issue Date:: 1982-01-01

Research Org.:: Hanford Engineering Development Lab., Richland, WA (United States)

OSTI Identifier:: 864397

Patent Number(s):: 4359349

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C21D8/005 - {of ferrous alloys

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C38/44 - with molybdenum or tungsten
C22C38/50 - with titanium or zirconium
C22C38/48 - with niobium or tantalum

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DOE Contract Number:: EY-76-C-14-2170

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 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/

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                    Merrick, Howard F, and Korenko, Michael K. Method for heat treating iron-nickel-chromium alloy.  United States: N. p., 1982. 
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                    Merrick, Howard F, & Korenko, Michael K. Method for heat treating iron-nickel-chromium alloy.  United States.

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                    Merrick, Howard F, and Korenko, Michael K. Fri .  
        "Method for heat treating iron-nickel-chromium alloy".  United States.  https://www.osti.gov/servlets/purl/864397.

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@article{osti_864397,

  title        = {Method for heat treating iron-nickel-chromium alloy},

  author       = {Merrick, Howard F and Korenko, Michael K},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1982},

  month        = {1}

}

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