Manufacturing & EDM

Graphite products are widely applied in electrical discharge machining (EDM), serving as a core material in precision manufacturing due to their high-temperature resistance, low wear, excellent electrical conductivity, and superior machinability. Gradually replacing traditional copper electrodes, they drive the industry toward higher efficiency and precision.

I. Core Advantages of Graphite Products in EDM

1. High-Temperature Resistance and Low Wear

  • Thermal stability: With a sublimation temperature of up to 3,650°C and a thermal expansion coefficient just 1/30th that of copper, graphite electrodes exhibit exceptional dimensional stability during high-temperature discharge machining, minimizing deformation.

  • Wear compensation: During electrical discharge, carbon atoms from the dielectric fluid form a protective layer on the electrode surface, reducing the wear rate of graphite electrodes to 1/4th that of copper electrodes and significantly extending their service life.

2. High Electrical Conductivity and Efficient Machining

  • Superior conductivity: Graphite’s resistivity (8–12 μΩ·m) ensures outstanding electrical performance, enabling discharge speeds 2–3 times faster than copper, particularly suited for high-current machining scenarios.

  • Rapid mechanical processing: Graphite electrodes can be machined 2–3 times faster than copper counterparts and require no deburring, drastically shortening electrode preparation cycles.

3. Lightweight Design and Compatibility with Large Electrodes

  • Reduced machine load: With a density only 1/5th that of copper, graphite electrodes alleviate stress on machine tools during large-scale machining, enhancing equipment stability and lowering energy consumption.

  • Application in complex structures: Ideal for aerospace and automotive mold manufacturing, such as micro-machining turbine blade film cooling holes (with hole diameter precision of 0.3–1.2 mm).

4. Chemical Stability and Environmental Sustainability

  • Corrosion resistance: Graphite withstands strong acids, alkalis, and high-temperature oxidation, with ash content controlled below 20 ppm to meet semiconductor-grade silicon purity standards.

  • Recyclability: Over 95% of graphite materials can be recovered through high-temperature purification, enabling a closed-loop industrial chain aligned with green manufacturing goals under the "dual carbon" strategy.