High-density tungsten alloy material and preparation method thereof

The invention provides a high-density tungsten alloy material and a preparation method thereof, and relates to the technical field of metallurgy. Tungsten powder, nickel powder and iron powder are subjected to first mechanical ball milling, and homogeneous modified mixed powder is obtained; performing cold isostatic pressing on the homogenized modified mixed powder to obtain a cold-pressed blank; the cold-pressed blank is subjected to liquid-phase sintering, and a sintered blank is obtained; graphite powder and low-temperature glass powder are subjected to second mechanical ball milling, obtained composite powder is pressed, a pressed blank is processed, and a force transmission lubricating medium sheath is obtained; the sintered blank is placed in the force transmission lubricating medium sheath to be heated to 400-900 DEG C, heat preservation is conducted for 40-70 min, then hot hydrostatic extrusion is conducted, and an extruded blank is obtained; and the extrusion blank is subjected to heat treatment, and