Copper material, can be simply divided into two categories, one of which is pure copper and the other is composed of various copper alloys. What is copper alloy? According to the explanation of Baidu library, alloy, is by two or more metals and metal or non-metal synthesized by a certain method of the material with metal properties. Generally obtained by melting into a homogeneous liquid and solidification. Copper alloy, obviously means that the alloy contains the element copper. Can be simply understood as copper alloy (copper alloy) to pure copper as the substrate by adding one or several other elements of the composition of the alloy.
Pure copper is divided into three types, namely, oxygen-free copper, copper, phosphorus deoxidation copper. Oxygen-free copper copper purity is greater than 99.95%, due to high conductivity, stable processing performance, weldability, corrosion resistance and low temperature performance are good. Therefore, it is widely used in the manufacture of busbar, conductive strip, waveguide, coaxial cable, vacuum seals, vacuum tubes, transistors, components, etc.; Usually we say that the purple copper, refers to the copper content of 99.95% or more, it must be only a very small amount of impurities to be able to do so, because of the purity of the purple copper is very high, for this reason, the conductivity of the purple copper compared to the other materials of the copper has been greatly reduced. Copper is widely used in the production of generators, bus bars, cables, switchgear, transformers and other electrical equipment and heat exchangers; phosphorus deoxygenation of copper copper content of 99.90% or more, welding performance and cold bending performance is good, is widely used in the production of gasoline or gas pipeline, drainpipes, condenser tubes, water mine with tubes, condensers, evaporators, heat exchangers, train box parts.
For the classification of copper alloys are generally divided into the following categories brass, bronze, white copper, silver copper these four categories.
Brass refers to copper and zinc-based alloy, due to high strength, hardness, chemical resistance, this brass is widely used in the production of heat exchangers and condensers, low-temperature piping, submarine transportation tubes. Manufacture of sheet, bar, rod, tube, casting parts and so on.
Bronze originally refers to copper-tin alloy, because bronze has high strength, good resistance to sliding friction, excellent cutting performance and good welding properties, in the atmosphere, fresh water has good corrosion resistance, etc., for which bronze is widely used in springs, reeds and other elastic components and pipe fittings, chemical instruments, wear parts and antimagnetic parts and the production of aviation, automotive, tractor industry and other industries to bear the friction of parts; white copper is made of copper, copper and tin alloy. Parts; white copper is nickel as the main added elements of copper-based alloys, good ductility, high hardness, beautiful color, corrosion resistance, rich in deep-drawn performance, is widely used in shipbuilding, petrochemical, electrical appliances, instrumentation, medical equipment, daily necessities, handicrafts and other fields, and is also an important alloy of resistance and thermocouples.
The disadvantage of white copper is the main added elements – nickel belongs to the scarcity of strategic materials, the price is relatively expensive;; silver copper is silver and copper dibasic.
Silver copper is a binary alloy of silver and copper, its outstanding features are strong resistance to sulfides, good electrical conductivity, mobility and wettability, better mechanical properties, high hardness, wear resistance and resistance to fusion welding. Widely used in the production of air circuit breakers, voltage controllers, telephone relays, contactors, starters and other devices such as contacts, conductive ring and fixed contacts. Vacuum brazing, rectifier, but also the manufacture of coins, decorations and tableware, etc.
