Preparation and processing method of superfine super-strong tungsten filament

The invention discloses a preparation and processing method of an ultra-fine and ultra-strong tungsten filament, and belongs to the field of tungsten filament preparation, and the ultra-fine and ultra-strong tungsten filament has a better doping strengthening effect by adding tungsten powder, dispersion strengthening second-phase mass points and solid solution strengthening solute elements and adopting a multi-component composite doping mode. By means of the multi-component composite doping mode, the strength performance of the finished white tungsten filament can reach the tensile strength of 5500-6800 MPa. Besides, in the aspect of material processing, compared with an unwelded single tungsten alloy rotary swaging rod, the welding method of the tungsten alloy rotary swaging rod can greatly improve the working efficiency of subsequent processing, reduce the production cost and improve the yield of tungsten filaments. Electrolysis is carried out after a combined process of rolling, rotary swaging and wire dra