High-W-Mo solid solution strengthened spaceflight high-quality high-temperature alloy bar and preparation method thereof

The invention discloses a high-W-Mo reinforced spaceflight high-quality high-temperature alloy bar and a preparation method thereof, a vacuum induction melting + vacuum consumable melting (VIM + VAR) duplex smelting process is adopted, so that the precise control of alloy components is ensured, the alloy purity is improved, and the number of inclusions and the gas content of steel ingots are reduced; the high-quality high-temperature alloy bar which is qualified in component, free of macrosegregation, uniform in microstructure and smaller than 4-grade in grain size is obtained through multi-heating-number forging upsetting and drawing cogging and multi-pass precision forging deformation. And the quality stability of the high-temperature alloy large-specification bar is improved, the structure uniformity is improved, the room-temperature and high-temperature mechanical properties and the hot corrosion resistance of the bar are improved, and the requirements of aerospace engine parts can be met. The alloy bar i