| 摘要 |
A thermo-mechanical treatment process is disclosed. The process comprises a first heating step comprising heating a nickel-base alloy workpiece to a temperature greater than a M 23 C 6 carbide solvus temperature of the nickel-base alloy; a first working step comprising working the heated nickel-base alloy workpiece to a reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature greater than a M 23 C 6 carbide solvus temperature when the first working step begins; a second heating step comprising heating the worked nickel-base alloy workpiece to a temperature in a range of 927°C (1700°F) to less than the M 23 C 6 carbide solvus temperature of the nickel-base alloy, wherein the as-worked nickel-base alloy workpiece is maintained at elevated temperature and not permitted to cool to ambient temperature between completion of the first working step and beginning of the second heating step; and a second working step comprising working the heated nickel-base alloy workpiece to a second reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature greater than 927°C (1700°F) and less than the M 23 C 6 carbide solvus temperature of the nickel-base alloy when the second working step begins. |
