Effect of regimes of hot plastic deformation on the structure and properties of stamped billets

Abstract

One way of increasing the service life and reliability of gas-turbine engines is to raise the endurance limit of compressor blades by improving the manufacturing technology. The endurance limit of the blades depends on many factors, the most important of which is the structural state of the material for blade billets. A stable, high endurance limit can be attained if the whole complex of technological effects, beginning with the hot deformation and ending with the surface treatment of ready parts, is optimized. The regimes of hot deformation which creates the initial structure mainly determines the endurance limit. In this paper the influence of the regimes of hot deformation on the structure and endurance limit of stamped billets imitating compressor blades is investigated for the KhN45MVTYuBR-ID (EP718-ID) alloy.