C17500 copper tube production process and product advantages:

1. Production process

The production process of C17500 copper tube combines traditional copper material processing with specific heat treatment process:

Raw material smelting: Based on cathode copper, alloy elements such as beryllium (Be 0.4-0.7%) and cobalt (Co 2.4-2.7%) are added, and melted at 1200℃ through an industrial frequency furnace to form a uniform melt.

Casting and cooling: The horizontal continuous casting process is used for forming, and then water-cooled to about 50℃ to form a blank.

Rolling and drawing: The surface oxide layer is removed by milling, and then multiple plastic processes such as planetary rolling, triple drawing, and disk drawing are performed to gradually reduce the wall thickness and improve the dimensional accuracy. Scrap (S4-S5) and waste mineral oil (S5) are generated in the process.

Heat treatment:

Solution treatment: Hot processing (such as forging) is performed in the range of 700-925℃ to improve material uniformity.

Age hardening: Through quenching and tempering and subsequent aging treatment (such as tempering at 400-500℃), the strengthening phase is precipitated to increase the tensile strength to a maximum of 980MPa, while maintaining a high conductivity of 45-65%IACS.

Surface treatment and molding: Stress is eliminated through online annealing, and then the finished product is processed through rewinding, flaw detection, cleaning and other processes.

2. Product advantages

High strength and hardness:

The yield strength after aging reaches 951MPa, the tensile strength is up to 980MPa, which is more than 40% higher than ordinary copper, and the hardness (HB) reaches 230-255HV.

Excellent electrical/thermal conductivity:

The electrical conductivity is 45-65%IACS, and the thermal conductivity is 208W/(m·℃), which is suitable for heat dissipation and current carrying scenarios, such as resistance welding electrodes and electronic connectors.

Environmental resistance:

The corrosion resistance is better than that of red copper, resistant to seawater and atmospheric corrosion, non-magnetic, and does not produce sparks when impacted, which is suitable for explosion-proof environments.

Processing and process adaptability:

Excellent hot processing performance (such as forging temperature 760-925℃), cold processing can form complex parts through drawing and stamping; good welding compatibility, supporting laser welding, electron beam welding, etc.

Wide application:

Mold manufacturing: When used as an injection mold insert, the thermal conductivity is 3-4 times higher than that of steel, shortening the cooling cycle and reducing deformation.

Electronics and automobiles: Suitable for fuses, springs, switch components and lightweight automotive components.

Environmental protection and economy:

Production waste can be recycled and complies with the RoHS directive. Although the initial cost is high, it has a long life and low maintenance cost.