Copper sleeve, also known as copper bearing, is made of various copper alloys and is usually used to lubricate mechanical parts. There are many kinds of copper covers, which are self-lubricating ones. There is no need to oil the copper covers. There are graphite copper covers that need to be oiled. The commonly used materials are tin bronze, aluminum bronze, brass, lead bronze, etc.
Classification of copper based alloys
Brass: brass is an alloy of copper and zinc. Brass composed of copper and zinc is called ordinary brass. The alloy composed of more than two elements is called special brass. The brass sleeve has strong wear resistance.
Special brass, also known as special brass, has the characteristics of high strength, high hardness and strong chemical corrosion resistance. There are also processing machinery performance is more prominent. Seamless copper tube made of brass is soft and durable.
Brass seamless pipe can be used in heat exchanger and condenser, low temperature pipeline and submarine pipeline. Manufacturing plate, bar, bar, pipe, casting, etc. Copper in 62% - 68%, strong plastic, manufacturing pressure equipment.
Tin bronze: tin content in 3 ~ 14%, mainly used for manufacturing elastic components and wear-resistant parts. The alloy has high mechanical properties, wear resistance and corrosion resistance, easy cutting, good brazing performance, small shrinkage and no magnetism.
Tin bronze sheath has strong corrosion resistance in atmosphere, seawater, fresh water and steam, and is widely used in steam boiler and marine components. It is also widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields.
Aluminum bronze: the content of aluminum is generally not more than 11.5%. Sometimes, iron, nickel, manganese and other elements are added to further improve the performance of aluminum bronze. Aluminum bronze can be strengthened by heat treatment. Its strength is higher than that of tin bronze.
It has high strength and good wear resistance. It is used for high strength screw, nut, shaft sleeve, sealing ring and wear-resistant parts. Its most outstanding feature is its good wear resistance.
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