METHOD OF PRODUCTION OF ITEMS FROM HIGH-TEMPERATURE WROUGHT NICKEL ALLOY Russian patent published in 2007 - IPC C22F1/10 B21J5/00 

FIELD: production of items from high-doped high-temperature wrought nickel alloys for disks of gas-turbine engines.

SUBSTANCE: proposed method includes vacuum induction melting for obtaining ingot for deformation. At least one cycle of pre-extrusion is performed which is followed by recrystallization annealing. Extrusion of blank is performed in die by repeated forcing of blank from cylindrical to taper part of die at temperature below T_c.d.γ' by 55-95C. Die is heated to temperature not below T_c.d.γ' -250C and not above the blank heating temperature. Rate of deformation , where T_c.d.γ' is temperature of complete dissolving of γ' phase. During each subsequent stage of forcing-out the blank, direction of forcing out is reversed as compared with previous stage. Prior to final deformation, blank is subjected to intermediate annealing. Items made from high-temperature nickel alloy have homogeneous structure in complex stampings and stable level of properties ensuring reduction of extrusion force and final deformation.

EFFECT: enhanced efficiency; increased factor of utilization of metal.

7 cl, 1 dwg, 3 tbl, 6 ex