Isothermal Deformation of Heat-Resistant Alloys

This article reports on the development and industrial use of production processes that employ high-temperature isothermal stamping to make disks for gas-turbine engines (GTEs) and other parts composed of hard-to-deform heat-resistant heterophase alloys of nickel and titanium. Mastering the production of semifinished products for GTE disks required the solution of a multifaceted problem – develop thermomechanical regimes for the alloys’ deformation that will make use of superplasticity, create effective protective-lubricant coatings, develop ultra-heat-resistant stamping materials that will be very durable in air, and design energy-efficient equipment for isothermal stamping. The technologies that have already been developed have been used to master the production of economical high-quality stampings made of hard-to-deform ultra-heat-resistant alloys that would be difficult or impossible to make by traditional technologies.