Method for preparing high-strength and high-plasticity tungsten alloy through mechanical alloying

The invention discloses a method for preparing a high-strength and high-plasticity tungsten alloy through mechanical alloying, and belongs to the technical field of powder metallurgy. Tungsten powder and second-phase ceramic particles are adopted as raw materials, and the volume content of the second-phase ceramic particles is not smaller than 3.0%. Tungsten powder and second-phase particles are subjected to high-energy ball milling crushing and mixing treatment, nano tungsten-based powder with the second-phase particles evenly doped is prepared, the powder is sintered after being formed, and the high-strength and high-plasticity tungsten alloy can be obtained. The manufacturing process is simple, the prepared material has excellent work hardening capacity and high-strength and high-plasticity characteristics, and the relative density is not lower than 95.0% and even larger than 98.0%; the grain size is smaller than 3.0 mu m and even does not exceed 2.0 mu m; the room-temperature compression plasticity is gre