Copper is widely used in modern industry because of its high conductivity and thermal conductivity, outstanding corrosion resistance, and easy processing and manufacturing. Next, briefly introduce the differences between chromium zirconium copper, aluminum oxide copper and red copper.

CuCrZr

Chromium zirconium copper is a metal material with chemical formula CuCrZr, hardness hrb78-83 and conductivity 43ms / m. Chromium zirconium copper has good conductivity, thermal conductivity, high hardness, wear resistance, explosion resistance, crack resistance and high softening temperature.

Chromium zirconium copper (CuCrZr) is composed of three metals, which has high hardness, good wear resistance and explosion resistance, and high softening temperature (hardness >75hrb; after being maintained at 550 ℃ for 2h, quenching water cooling is not less than 15% compared with the original hardness; the average value of three-point conductivity measured by eddy current conductivity meter is ≥ 44ms / m.) It is a good welding material with good crack resistance. The common brands include qcr1-0.15, qcr0.6-0.4, QCr0.5, c18150, c18200, etc.

It has high strength and hardness, conductivity and thermal conductivity, good wear resistance and antifriction. After aging treatment, the hardness, strength, conductivity and thermal conductivity are significantly improved, and it is easy to weld. It is widely used in motor commutators, spot welding machines, seam welding machines, electrodes for butt welding machines, and other parts that require strength, hardness, conductivity and cushion resistance at high temperatures. The EDM electrode can etch an ideal mirror surface, and has good upright performance. It can complete the effect that pure red copper such as slicing is difficult to achieve, and has good performance for tungsten steel and other difficult to machine materials.

During welding, the electrode loss is small, the welding speed is fast, and the total welding cost is low. It is suitable for the electrode related pipe fittings of the fusion welding machine, but it is generally good for electroplated workpieces. It is widely used in welding, conductive nozzle, switch contact, mold block, welding machine auxiliary device and other materials in automobile, motorcycle, barrel (can) and other machinery manufacturing industries.

Alumina copper

Aluminum oxide copper, because of the existence of aluminum oxide, does not stick to the electrode when welding workpieces with coatings (such as zinc plating and nickel plating).

At the same time, the high temperature softening of alumina copper is about 1000 degrees, while the hardness of chromium zirconium copper begins to decline sharply at about 400 degrees. The softened electrode has a great impact on the quality of resistance welding.

Alumina copper (also known as dispersion strengthened copper), conductivity ≥ 80% IACS, softening temperature ≥ 900 ℃. It has high strength, high conductivity and high softening temperature.

It has excellent performance in all aspects. In the welding process, it has a high number of spot welding. When welding galvanized sheet and aluminum sheet, the electrode life is several times higher than that of ordinary chromium zirconium copper, which reduces the time of stopping work to repair the electrode and improves the efficiency of the automatic welding production line. When aluminum oxide copper is welding the coated metal, the electrode is not easy to deform, not bonded, the contact spark is small, not blackened, the solder joint is beautiful, and there is no obvious dent, showing its superior welding performance.

Red copper

Red copper is a simple substance of copper, named for its purple color. Red copper is a relatively pure copper, which can be generally regarded as pure copper. It has good conductivity and plasticity, but its strength and hardness are poor. It has excellent conductivity, thermal conductivity, ductility and corrosion resistance.

The conductivity and thermal conductivity of red copper are second only to silver, and are widely used to make conductive and heat conducting equipment. Red copper is much more widely used than pure iron. Every year, 50% of copper is electrolytic purified into pure copper, which is used in the electrical industry. The red copper mentioned here must be very pure, with copper content of more than 99.95%. A very small amount of impurities, especially phosphorus, arsenic, aluminum, etc., will greatly reduce the conductivity of copper. It is mainly used to make electrical equipment such as generators, buses, cables, switchgear, transformers, and heat conduction equipment such as flat plate collectors of heat exchangers, pipelines, and solar heating devices.

Source: spot welding Yang

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