What is the difference between chromium zirconium copper, alumina copper and red copper?
Because copper has high electrical and thermal conductivity, outstanding corrosion resistance, and is easy to process and manufacture, it is widely used in modern industry. Next, let's briefly introduce the differences between chromium zirconium copper, alumina copper, and red copper.
Chromium Zirconium Copper
Chromium zirconium copper is a metal material with a chemical formula of CuCrZr, a hardness of HRB78-83, and a conductivity of 43ms/m. Chromium zirconium copper has the characteristics of good electrical conductivity, thermal conductivity, high hardness, wear resistance, explosion resistance, crack resistance and high softening temperature.
Chromium zirconium copper (CuCrZr) is composed of three metals. It has high hardness, good wear resistance and explosion resistance, and high softening temperature (hardness>75HRB; after being kept at 550°C for 2 hours, the quenching water cooling should not be less than 15% of the original hardness. % or above; the average conductivity of three points measured with an eddy current conductivity meter is ≥44MS/M) and has good crack resistance. It is a good welding material. Common grades include QCr1-0.15, QCr0.6-0.4, QCr0.5, C18150, C18200, etc.
It has high strength and hardness, electrical and thermal conductivity, good wear resistance and wear-reducing properties. After aging treatment, the hardness, strength, electrical conductivity and thermal conductivity are significantly improved, and it is easy to weld. It is widely used in motor commutators, spot welders, seam welders, butt welder electrodes, and other parts that require strength, hardness, conductivity, and conductive pad properties at high temperatures. The spark electrode can be used to electrically etch an ideal mirror surface. At the same time, it has good upright performance and can accomplish effects such as thinning that are difficult to achieve with pure red copper. It performs well on difficult-to-process materials such as tungsten steel.
During welding, the electrode loss is small, the welding speed is fast, and the total welding cost is low. It is suitable as an electrode-related pipe fitting for a fusion welding machine, but its performance on electroplated workpieces is average. It is widely used in various materials for welding, contact tips, switch contacts, mold blocks, and welding machine auxiliary devices in machinery manufacturing industries such as automobiles, motorcycles, and barrel making (cans).
Alumina copper
Because of the presence of aluminum oxide, aluminum oxide copper does not stick to the electrode when welding workpieces with coatings (such as zinc plating, nickel plating).
At the same time, the high temperature softening of alumina copper is about 1000 degrees, while the hardness value of chromium zirconium copper begins to drop 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°C. It has the properties of high strength, high conductivity and high softening temperature.
Combining excellent performance in all aspects, it has a high number of spot welds during the welding process. When welding galvanized plates and aluminum plates, the electrode life is several times longer than that of ordinary chromium zirconium copper, which reduces the time for downtime to repair electrodes and improves efficiency. The efficiency of automatic welding production lines. When alumina copper is used to weld coated metals, the electrode is not easily deformed, does not adhere, has small contact sparks, does not turn black, has beautiful solder joints and has no obvious dents, showing its superior welding performance advantages.
Copper
Copper is a simple substance of copper, so named because of its purple-red color. Red copper is a relatively pure type of copper. It can generally be considered as pure copper. It has good electrical conductivity and plasticity, but poor strength and hardness. It has excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance.
The electrical conductivity and thermal conductivity of red copper are second only to silver, and it is widely used in making electrical and thermal conductive equipment. The uses of red copper are much wider than that of pure iron. Every year, 50% of copper is electrolytically purified into pure copper and used in the electrical industry. The red copper mentioned here must be very pure, containing more than 99.95% copper. 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, busbars, cables, switchgear, and transformers, as well as thermal conductive equipment such as heat exchangers, pipes, and flat-plate collectors of solar heating devices.
