How to identify copper materials and their uses
We may all be familiar with copper. In daily life, each of us can say that we are inseparable from copper products. However, even so, many people still cannot correctly distinguish the same material. Today, let the editor lead you Let's distinguish various types of copper materials and talk about its uses.
Copper materials can be simply divided into two categories, one of which is pure copper, and the other is composed of various copper alloys. What is a copper alloy? According to Baidu Library, an alloy is a substance with metallic properties that is synthesized by a certain method from two or more metals and metals or non-metals. Generally obtained by fusing into a uniform liquid and solidifying. Copper alloy, obviously means that the alloy contains copper element. It can be simply understood as a copper alloy (copper alloy), which is an alloy composed of pure copper as a matrix and one or several other elements added to it.
According to my country's classification standards for non-ferrous metals, pure copper is divided into three types, namely oxygen-free copper, red copper, and phosphorus-deoxidized copper. The purity of oxygen-free copper is greater than 99.95%. Due to its high conductivity, stable processing performance, good weldability, corrosion resistance and low temperature performance. Therefore, it is widely used in the manufacture of busbars, conductive strips, waveguides, coaxial cables, vacuum seals, vacuum tubes, transistor components, etc.; usually when we talk about red copper, we mean that it contains more than 99.95% copper, which must be only a very small amount. This is because the purity of red copper is very high. For this reason, the conductivity of red copper is greatly reduced compared with copper of other materials. Red copper is widely used to make electrical equipment and heat exchangers such as generators, busbars, cables, switchgear, transformers, etc.; phosphorus deoxidized copper has a copper content of more than 99.90%, has good welding performance and cold bending performance, and is widely used in making gasoline or gas Delivery pipes, drainage pipes, condenser pipes, mine pipes, condensers, evaporators, heat exchangers, train box parts.
The classification of copper alloys is generally divided into the following four categories: brass, bronze, white copper, and silver copper.
Brass refers to an alloy based on copper and zinc. Due to its high strength, high hardness, and strong resistance to chemical corrosion, brass is widely used in the production of heat exchangers and condensers, cryogenic pipelines, and submarine transportation pipes. .Manufacture sheets, bars, bars, pipes, casting parts, etc.;
Bronze originally refers to copper-tin alloy. Because bronze has high strength, good resistance to sliding friction, excellent cutting performance and good welding performance, and good corrosion resistance in the atmosphere and fresh water, bronze is widely used. It is used in elastic components such as springs and reeds, as well as pipe fittings, chemical equipment, wear-resistant parts and antimagnetic parts, as well as parts that are subject to friction in the aviation, automobile, tractor industries and other industries; white copper is a copper base with nickel as the main added element. Alloy has good ductility, high hardness, beautiful color, corrosion resistance and deep drawing properties. It is widely used in shipbuilding, petrochemical industry, electrical appliances, instruments, medical equipment, daily necessities, handicrafts and other fields, and is also an important resistor and thermocouple. alloy.
The disadvantage of white copper is that the main added element - nickel is a scarce strategic material and is relatively expensive;
Silver copper is a binary alloy of silver and copper. Its outstanding features are strong sulfide resistance, good electrical conductivity, fluidity and wettability, good mechanical properties, high hardness, wear resistance and welding resistance. . It is widely used to make contacts, conductive rings and fixed contacts of air circuit breakers, voltage controllers, telephone relays, contactors, starters and other devices. Vacuum solder, commutator, and can also be used to make coins, decorations, tableware, etc.
