Tungsten-rhenium alloy bar and preparation method thereof

The invention relates to the technical field of powder metallurgy, in particular to a tungsten-rhenium alloy bar and a preparation method thereof, and the tungsten-rhenium alloy bar comprises the following components by mass percent: 5-25% of rhenium, 1-5% of tungsten carbide and the balance of tungsten. The preparation method sequentially comprises the steps of wet chemical powder preparation, cold isostatic pressing forming, high-temperature sintering and rotary swaging machining forming, and the friction stir welding stirring head is obtained. The method has the beneficial effects that a nanometer tungsten carbide phase is introduced into a tungsten-rhenium matrix in situ, the dispersion strengthening effect is achieved, and meanwhile the abrasion resistance and compactness of the stirring head are greatly improved through the intrinsic excellent abrasion resistance property of hard alloy tungsten carbide; and the preparation process is simple, low in cost and suitable for industrial production. 本发明涉及粉末冶金技