Copper is the first metal that people learned to process and to this day the material remains relevant and in demand in many industries. Modern technologies make it possible to obtain copper of high purity, as well as to refine copper, thereby excluding oxygen in its composition.
Advantages of rolled copper
The metal has a lot of advantages, of which the main ones are high thermal conductivity, low electrical resistance, corrosion resistance and high ductility. Thanks to these properties, we have established the production of rolled copper. In particular, electrical wires are obtained from copper, which in terms of their electrical conductivity and durability are not inferior to aluminum ones and are only slightly inferior to silver. However, in comparison with silver, copper has a weighty argument in its favor - it is a price that is significantly lower than silver, therefore, the cost of rolled copper is much cheaper. The ductility of copper also plays a role in wire production. Appliance cords, flexible cables and other conductors that are subject to frequent kinks are made from copper. The most efficient in terms of heat transfer are radiators, the plates of which are made of copper, since this material among industrial metals ranks first in terms of thermal conductivity.
Lack of copper
Yet copper has one drawback - hydrogen embrittlement. During hot working of copper or the operation of copper parts at temperatures above 200 ° C, hydrogen is oxidized in the metal with oxygen, as a result of which the formed water vapor under high pressure creates pores in the monolithic structure of copper. Such porous zones are called embrittlement zones.
Solving problems with the disadvantages of rolled copper
This problem is solved by refining copper. There are two ways. Deoxidation of copper with phosphorus is a cheaper method, but the phosphorus in the composition of copper reduces its electrical conductivity, therefore, for conductors of electric current, oxygen-free copper is obtained more expensively by remelting in a vacuum or reducing atmosphere. Oxygen-free copper has the highest electrical conductivity among all brands, but this is not the main purpose of its production. Refined copper has increased process ductility, increased tensile elongation and can be operated at high temperatures.