THERMOMECHANICAL PROCESSING OF NICKEL-BASED ALLOYS

摘要

FIELD: metallurgy.;SUBSTANCE: invention relates to metallurgy, specifically to thermomechanical treatment of nickel-based alloys. Method for thermomechanical treatment of nickel-based alloy includes a first step of heating a workpiece to temperature 1,093–1,163 °C, a first step of rotary forging workpiece heated to 1,093–1,163 °C with reduction of cross section area by 30–70 %, a second step heating workpiece to temperature 954–1,052 °C, wherein between end of first forging step and beginning of second step of heating workpiece is kept at temperature below temperature of dissolution of carbides M₂₃C₆ and does not allow it to cool to ambient temperature, and second step of rotary forging workpiece heated to 954–1,052 °C with reduction of cross section area by 20–70 %.;EFFECT: treated alloys are characterised by stability and high strength in a wide range of high temperatures.;45 cl, 3 dwg, 1 ex