Production process

Smelting and casting

Use high-purity electrolytic copper (copper content ≥99%) as raw material, use vacuum induction furnace for smelting, temperature controlled at 1180-1250°C, smelting time is about 90 minutes. Mixed rare earth (Re), chromium (Cr) and zirconium (Zr) alloys are added in this process to improve material performance.

The casting process adopts horizontal continuous casting technology to reduce the cooling of metal liquid and improve the yield rate.

2. Rolling and processing

Hot rolling: adopt large ingot rolling technology, increase the rolling speed through thickness closed loop control, and reduce unit energy consumption. After hot rolling, milling treatment is required to remove the surface oxide layer.

Cold rolling: Use AGC closed loop thickness control and roller type technology to improve the yield rate and reduce energy consumption. Leveling and cutting treatment are required after finishing rolling.

Annealing and surface treatment

The annealing process adopts high hydrogen atmosphere expansion annealing technology to further optimize the ductility of the material. Annealing temperature is usually 100-150°C, carried out under nitrogen protection.

Surface treatment includes pickling, primer/topcoat spraying, drying and other steps to improve corrosion resistance and aesthetics.

4. Other key processes

Through the combination of wet and dry processes, optimize oxidation sintering, graphic transfer and other links to ensure stable product performance.

Adopt mechanized packaging and strip slitting technology to reduce waste and improve production efficiency.

Product advantages

Excellent mechanical properties

High strength and ductility: tensile strength can reach 372 MPa, yield strength 165 MPa, while maintaining 30% elongation at break. Suitable for applications requiring high strength and flexibility, such as precision parts and flexible circuit boards.

Machinability: excellent machinability, brittle chips, high surface finish of workpieces, suitable for precision machining.

Corrosion resistance and dezincification resistance

Dezincification resistance: Adding arsenic (As) to form a stable α phase structure significantly improves dezincification resistance and is suitable for humid or corrosive environments.

Excellent corrosion resistance in drinking water, but avoid contact with ammonia or ammonia compounds to prevent stress corrosion cracking.

3. Stable thermal performance

The thermal conductivity and thermal expansion coefficient are moderate, and can maintain stability in high temperature environments, suitable for high temperature scenes such as heat exchanger components.

Environmental protection and energy saving

The production process uses technologies such as micro-oxidation heating and closed environment temperature control to reduce smoke and energy consumption. Some companies also reduce waste rates through mechanized packaging.

Wide application areas

Used in key blanks, gaskets, engraving plates, handicrafts, as well as high-end fields such as automotive parts, gun parts, and copper-clad ceramic substrates. Outstanding performance in flexible electronic devices (such as folding mobile phones).