copper aluminum alloy sheet

Aug 10, 2022

The current commonly used conductive materials in the power and electrical industry are copper and aluminum, and they are also commonly used heat exchange materials internationally. 2.33 times more than copper block. However, it is easy to be oxidized in the environment higher than room temperature, especially in the environment containing corrosive gas. Therefore, under the harsh conditions of industrial and mining, aluminum bars are reused instead of copper bars. If the two metal materials are combined, it will be a perfect conductive and heat exchange material. Therefore, whether it is used for electrical or thermal conductivity, copper aluminum alloy sheet is an excellent choice. With aluminum as the base and the outer layer of the composite copper, it is applied to the wire row and line with the power supply level rate greater than the power frequency. The copper is used as the base and the outer layer is clad with aluminum, which is suitable for electrical and thermal conductivity in industrial and mining areas. However, in the process of heat treatment of copper aluminum alloy sheet, copper aluminum alloy is easy to produce brittle alloy, and the heat treatment is controlled, that is, the degree of alloying is controlled, so as to ensure that the composite product can be bent and not delaminated.



Aluminum adopts advanced heat treatment process of copper-aluminum composite materials, controls diffusion annealing temperature, holding time and eliminates defects such as surface bubbling, which effectively ensures that the material can withstand the increased temperature difference, thermal expansion and contraction. Hole, bending, no cracking, no separation, and the interface bonding strength is continuously enhanced in the subsequent use process.

The annealing process can be effectively adjusted according to different composite material specifications (thickness, width, etc.) to achieve the best performance of the material. When the thickness increases, the annealing temperature and annealing time approach the upper limit; when the thickness decreases, the annealing temperature and annealing time approach the lower limit. When the width of the composite strip material increases, the annealing temperature and annealing time approach the upper limit; when the width of the composite strip material decreases, the annealing temperature and annealing time approach the lower limit. Copper aluminum alloy sheet, through the above annealing process, realizes the transition from physical bonding to metallurgical bonding of the interface. It can be seen from the SEM photos of the peeling interface of copper aluminum sheet through experiments that the composite interface obtained by the above heat treatment process is too late to form intermetallic brittle compounds.

Thus, the composite effect of the interface is guaranteed. In order to achieve the effect of annealing strengthening: the bending performance of the material is improved, the shear strength of the composite interface is increased, and the composite material can also obtain a certain hardness value.