METHOD FOR PRODUCING TWO-PHASE NI-CR-MO ALLOYS

摘要

In a method for making a wrought nickel-chromium-molybdenum alloy having homogeneous, two-phase microstructures the alloy in ingot form is subjected to a homogenization treatment at a temperature between 1107°C (2025°F) and 1149°C (2100°F), and then hot worked at start temperature between 1107°C (2025°F) and 1149°C (2100°F). The alloy preferably contains 18.47 to 20.78 wt.% chromium, 19.24 to 20.87 wt.% molybdenum, 0.08 to 0.62 wt.% aluminum, less than 0.76 wt.% manganese, less than 2.10 wt.% iron, less than 0.56 wt.% copper, less than 0.14 wt.% silicon, up to 0.17 wt.% titanium, less than 0.013 wt.% carbon, and the balance nickel.