How to Ensure the Surface Smoothness of Cleaned Tungsten Wire?

The measures to ensure the surface smoothness of cleaned tungsten wire include:

  • High-Quality Dies: Use polished diamond dies to reduce surface scratches during drawing.
  • Lubricants: Apply efficient lubricants (e.g., graphite or MoS₂-based lubricants) during drawing to reduce friction.
  • Cleaning: After drawing, remove oxides and impurities through chemical cleaning (e.g., acid pickling) or electrolytic polishing.
  • Annealing Control: Use appropriate annealing temperature and duration to prevent surface grain coarsening or oxidation.
  • Environmental Control: Perform processing in a clean, inert, or vacuum environment to prevent contamination by dust or oxides.
  • Inspection: Use surface roughness testers or optical microscopes to check smoothness and ensure compliance with standards (e.g., Ra < 0.1 μm).

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