Production process and product advantages of C14500 copper rod (tellurium copper):

Production process

Smelting and casting

Medium frequency furnace or industrial frequency furnace is used for smelting to ensure uniform composition of copper liquid, and the addition ratio of tellurium (0.4-0.7%) and phosphorus (0.004-0.012%) is strictly controlled to optimize performance.

Semi-continuous casting process: Use copper inner sleeve crystallizer, control cooling water pressure (0.22-0.25 MPa) and casting speed (110-140 mm/min), and obtain ingots with excellent surface quality and stable composition.

Hot working and cold working

Extrusion: Hot extrusion is performed through a large-tonnage reverse extruder (such as 3250T) to improve material density and uniformity of organization.

Stretching and drawing: The coil or straight drawing process is used to process into bars, wires and other profiles. The cold working rate affects the final performance. Increasing the processing rate can increase the tensile strength but reduce the elongation.

Annealing: Treatment in an annealing furnace to eliminate internal stress and optimize the softening properties of the material.

Inspection and Forming

Ultrasonic flaw detection detects internal defects, and packaging is performed after cutting to ensure the quality of the finished product.

Product Advantages

High electrical and thermal conductivity

The electrical conductivity is as high as 93-95% IACS (International Annealed Copper Standard), and some high-quality materials can reach more than 95%, which is suitable for high current transmission scenarios (such as new energy vehicle charging guns and electrical connectors).

The thermal conductivity is 355 W/(m·K), which is suitable for components that require rapid heat dissipation, such as radiators and plasma cutting nozzles.

Excellent cutting performance

Contains trace tellurium elements to form an easy-to-break chip structure, and the cutting efficiency is 1-2 times that of ordinary copper, close to 85% of lead brass C3600, and is not easy to stick to the knife, reducing tool wear.

Excellent mechanical properties

Tensile strength 350-380 MPa, yield strength 200-370 MPa, elongation 9-12%, with high strength and good plasticity, suitable for precision parts (such as gears, bearings) and complex structural parts processing.

Corrosion resistance and arc resistance

It has strong resistance to acidic environment, salt spray and electric ablation, suitable for marine equipment, industrial switches and welding electrodes.

Anti-fusion welding and anti-arc properties can reduce material burnout and extend component life.

Wide processing adaptability

Supports a variety of hot and cold processing methods such as forging, casting, extrusion, stamping, etc., and can be made into rods, plates, tubes, wires and other profiles to meet diverse needs.

Environmental protection and certification

It complies with international standards such as ASTM B301, ISO 1637, GB/T 5231, and has passed SGS and ISO certification. It is non-toxic and environmentally friendly and suitable for high-end electronics and food contact fields (such as plumbing pipes).

Application fields

Electronic and electrical appliances: aviation connectors, PCB conductive channels, semiconductor welding heads.

Automobile manufacturing: high current connectors for new energy vehicles, starter components.

Machining: precision gears, welding nozzles, wear-resistant bearings.

Energy and welding: plasma cutting machine nozzles, solar power station connectors.