Tungsten Copper for Electrode Machining
In modern precision manufacturing and mold-making, Electrical Discharge Machining (EDM) has become an essential technique for processing hard, complex, and high-precision components. Tungsten copper (W-Cu) alloys, known for their unique balance of physical and electrical properties, are widely used as electrode materials in EDM and Wire EDM (WEDM) processes. Their superior performance makes them indispensable in the fabrication of high-end molds and intricate parts.
1. Advantages of W-Cu in EDM Applications
Outstanding Arc Erosion Resistance
Tungsten's ultra-high melting point and hardness allow W-Cu electrodes to retain their shape under intense discharge conditions, ensuring consistent dimensional accuracy.
Excellent Electrical and Thermal Conductivity
The copper phase enables rapid electrical discharge and efficient heat dissipation, preventing overheating and improving machining stability.
High Dimensional Stability
Thanks to its low thermal expansion, W-Cu electrodes maintain consistent dimensions during machining, which is critical for precision applications.
Extended Electrode Life
Compared to pure copper or graphite electrodes, W-Cu offers better wear resistance and longer service life, reducing downtime and tooling costs.
2. Typical Application Scenarios
Hard Mold Machining: Precision EDM of dies for stamping, injection molding, and die casting.
Precision Component Manufacturing: Used in aerospace, medical, and automotive industries for complex 3D parts.
Micro-Hole and Narrow Slot Machining: Ideal for applications involving high aspect ratio features or deep cavities.
High-Finish Surface Processing: Excellent for mirror finishing or surface-sensitive EDM of mold inserts and electrodes.
3. Product Forms and Specifications
Tungsten copper EDM electrodes are typically available in the following forms:
Standard profiles such as rods, plates, and blocks
Custom-shaped electrodes per technical drawings
Precision-machined tools (e.g., mirror-finish or thin-walled electrodes)
Common grades include W70Cu30, W75Cu25, and W80Cu20. Different compositions can be selected based on machining complexity and discharge conditions.
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