EFFECT OF REGIMES OF HOT PLASTIC-DEFORMATION ON THE STRUCTURE AND PROPERTIES OF STAMPED BILLETS

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