As a high-strength, high-melting-point industrial material, cut-resistant tungsten wire is widely used in fields such as electrical discharge machining (EDM), semiconductor manufacturing, and aerospace. To ensure safe and efficient use, the following precautions should be followed:
I. Operational Environment Control
1. Maintain Cleanliness
Avoid contamination of tungsten wire by oil stains, iron filings, and dust to prevent embrittlement or oxidation due to impurity contact.
Inspect equipment tooling and fixtures before processing to ensure no iron debris residues.
2. Gas Protection
Use high-purity hydrogen or inert gases during high-temperature operations (e.g., heat treatment) to avoid reactions between tungsten wire and oxygen, sulfur, phosphorus, etc.
Strictly prohibit using tungsten wire in atmospheres containing sulfur or phosphorus to prevent chemical corrosion.
II. Equipment Operation Practices
1. Winding and Processing
Do not rewind straightened tungsten wire to prevent internal stress damage.
Minimize friction with steel components during winding to avoid surface scratches or iron contamination.
2. Heat Treatment Process
During the first hydrogen firing to remove graphite emulsion, control the temperature below 1400℃ and ensure appropriate humidity of hydrogen gas to prevent tungsten wire carbonization.
Use a molybdenum boat for loading during the second shaping heating process to avoid contact with metals such as iron, nickel, and copper.
III. Process Parameter Control
1. Tension and Speed
Adjust tension according to the diameter of the tungsten wire during cutting or processing to prevent wire breakage.
Control the feed speed to avoid overheating or deformation of the tungsten wire due to excessive speed.
2. Cooling and Lubrication
Use appropriate cooling media (e.g., deionized water) in EDM to prevent localized overheating.
Avoid direct contact between coolant and tungsten wire to reduce corrosion risks.
IV. Personal Protection and Safety
1. Protective Equipment
Wear high-temperature-resistant gloves, goggles, and dust masks to protect against high-temperature splashes, dust, and harmful gases.
Avoid direct contact with sharp edges of tungsten wire to prevent cuts.
2. Emergency Handling
Immediately stop operations if tungsten wire breakage or equipment abnormalities are detected, and inspect the cause before resuming operations.
Set up warning signs in the processing area to prevent unauthorized personnel from approaching high-temperature equipment.
V. Quality Inspection and Maintenance
1. Raw Material Inspection
Inspect the surface quality of tungsten wire before use to ensure no scratches, cracks, or other defects.
Verify that the microhardness meets requirements (e.g., the hardness range of 200m tungsten wire should comply with standards).
2. Equipment Maintenance
Regularly clean processing equipment and replace worn fixtures or guide wheels.
Store tungsten wire in a dry place away from corrosive substances.
VI. Application Scenario Adaptation
1. Electrical Discharge Machining (EDM)
Maintain a stable gap between the electrode wire and the workpiece when using tungsten wire as the electrode to avoid short circuits or arcing.
Use dedicated wire guides to reduce tungsten wire vibration.
2. Semiconductor Cutting
Control tungsten wire tension and cutting depth to prevent wafer edge chipping or wire breakage.
Optimize the wire path when using fine-diameter tungsten wire (e.g., below 40μm).
3. Medical Field
Ensure the biocompatibility of tungsten wire and sterilize it before use.
Avoid long-term storage in humid environments to prevent surface oxidation.
VII. Storage and Transportation
Store tungsten wire in sealed packaging to avoid contact with acidic substances or humid environments.
Use dedicated packaging during transportation to prevent crushing or friction damage.
