| 摘要 |
A method for heat treating an age-hardenable iron-nickel-chromium 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 0.5% 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 DEG C. for 1/2 hour with an air-cool plus heating at 800 DEG C. for 2 hours with a furnace cool to 625 DEG C. The alloy is then held at 625 DEG C. for 12 hours, followed by an air-cool. |
