Production process and product advantages of C36000 copper tube:

Production process

Smelting and casting

The cathode copper and phosphor copper alloy are melted at 1200℃ in an industrial frequency furnace, and the tube billet is formed by horizontal continuous casting. The application of submerged flow combined furnace technology simplifies the furnace structure and reduces energy consumption.

The proportion of copper (60-63%), zinc (remainder) and trace elements (such as lead 2.5-3.7%, iron ≤0.35%) needs to be precisely controlled in the batching process.

Hot and cold processing

Rolling and stretching: Planetary rolling machines and high-speed stretching machines are used to improve dimensional accuracy and surface finish and reduce eccentricity. For example, Zhejiang Hailiang Company uses floating core head stretching technology to ensure the quality of internal and external surfaces.

Drawing and straightening: Further processing is carried out through triple drawing, disc drawing and other processes, and high-precision straightening machines are used to ensure straightness and avoid straightening marks.

Heat treatment

Online induction annealing technology (600-650℃) is used to adjust hardness and eliminate internal stress while shortening the process flow. In some cases, aging hardening treatment is required to improve strength.

Finishing and testing

Surface cleaning, rewinding and other processes ensure the cleanliness of the finished product. Swiss imported direct reading spectrometers, electronic tensile testing machines and other equipment are used for precise detection of chemical composition and mechanical properties.

Product advantages

Excellent mechanical properties

Tensile strength can reach 350-550 MPa, yield strength 140-310 MPa, and elongation up to 30%. After cold working or aging treatment, the hardness is significantly improved, suitable for high-load components such as automotive parts.

Excellent processing performance

Machinability rating 100%: High lead content (2.5-3.7%) forms short chips during cutting, reduces tool wear, and is suitable for high-speed automatic processing (such as gears, screws).

Supports a variety of hot and cold processing processes, including forging, extrusion, stamping, etc., with good plasticity and fluidity, suitable for complex shape parts.

Corrosion resistance

It is stable in seawater, atmosphere and industrial environment, especially in fresh water, but it is necessary to pay attention to the tendency of dezincification.

Electrical conductivity and thermal conductivity

Although the electrical conductivity is lower than that of pure copper, it is better than most alloys and is suitable for electrical components (such as switches and transformers).

Energy saving and efficient production

The planetary rolling-continuous drawing technology, online annealing and other processes are used to reduce energy consumption and improve the yield rate, and the energy consumption per unit product is reduced.

Wide application areas

Automobiles (sensors, brake components), electronics (circuit boards), construction (pipes, radiators), hardware (locks, fasteners) and medical equipment, etc.