The production of cleaned tungsten wire is a complex multi-step process, summarized as follows:
- Raw Material Extraction: Tungstate is extracted from scheelite (CaWO₄) and chemically processed to obtain tungsten trioxide (WO₃).
- Reduction: WO₃ is reduced to metallic tungsten powder in a hydrogen atmosphere.
- Doping: Dopants (such as K, Si, Al, or rare earth oxides) are added to the tungsten powder.
- Pressing and Sintering:
- The doped tungsten powder is pressed into rod-shaped blanks.
- High-temperature sintering is performed in a hydrogen or vacuum environment to form dense tungsten blanks.
- Swaging: The sintered tungsten blank is swaged into thinner tungsten rods.
- Drawing: Through multiple drawing and annealing passes, tungsten wire of the required diameter is produced.
- Cleaning and Polishing: Surface oxides are removed via chemical cleaning or electrolytic polishing to ensure surface smoothness.
- Heat Treatment: Final annealing or stress-relief treatment is applied to optimize the mechanical and electrical properties of the tungsten wire.
- Quality Inspection: Diameter, surface quality, tensile strength, etc., are tested to ensure compliance with standards.
More details of tungsten wire, please visit website: http://www.tungsten-wire.com.cn/
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Email: sales@chinatungsten.com
Tel.: +86 592 5129595
