Production process and product advantages of C18200 copper rod:

1. Production process

Melting and casting process

Using non-vacuum melting technology, by controlling the addition and uniformity of chromium (Cr) (content 0.85%-1.05%), the alloy composition is ensured to be stable. The casting method includes semi-continuous casting, which solves the problem of uneven distribution of chromium elements.

Hot working and forming

Hot working: including hot forging (temperature 900-950℃), hot extrusion (temperature 820-930℃) and other processes, the hot forging can reach 80% of forged brass.

Cold working: cold drawing, cold rolling, upsetting, etc. can be carried out, but attention should be paid to cooling and lubrication to reduce friction.

Heat treatment strengthening

Quenching: water-cooled solution treatment at 950-1000℃ to improve the toughness of the material.

Aging treatment: aging at 400-500℃ for 2-4 hours, significantly improving the hardness and strength (softening strength reaches 400 MPa, which is twice that of cold working).

Process optimization

Large-size bars adopt the "semi-continuous casting + aging" process, which has the advantages of short process, high yield and low cost compared with other processes (such as hot forging + quenching + aging).

Online quenching technology combined with aging strengthening ensures that the material properties meet the requirements of high strength and high conductivity.

2. Product advantages

Excellent comprehensive performance

High conductivity: conductivity ≥80% IACS (aging state), meeting the requirements of high-temperature conductivity.

High strength and hardness: tensile strength of 460 MPa at room temperature and 400℃, hardness HRB 70-80.

Wear resistance and softening resistance: softening temperature ≥500℃, high strength is still maintained at high temperature, suitable for long-term high temperature use.

Good processing adaptability

Supports a variety of processing methods, including extrusion, forging, welding (tin soldering, silver soldering, gas shielded welding), etc., but oxyacetylene welding and resistance welding should be avoided.

The hot and cold processing performance is balanced, and the hot forging property is 80% of forged brass.

High temperature stability and corrosion resistance

High temperature oxidation resistance, atmospheric and fresh water corrosion resistance, suitable for harsh environments such as high temperature switches and welding machine electrodes.

Adding chromium elements increases the recrystallization temperature and enhances thermal strength.

Wide range of applications

Resistance welding: spot welding electrodes, seam welding wheels, etc., with better electrical corrosion resistance than pure copper.

Molds and mechanical parts: precision mold discharge machining, plastic mold components, high surface finish.

Electrical equipment: high temperature conductive and wear-resistant scenes such as motor collector rings and circuit breaker components.