Automobiles use 10 to 2 I kilograms of copper per car, depending on the type and size of the car. For cars, they account for about 6 to 9% of their own weight. Copper and copper alloys are mainly used in radiators, brake system piping, hydraulics, gears, bearings, brake linings, power distribution and power systems, gaskets, and various fittings, fittings, and trims. Among them, the radiator is relatively large. Modern tube-and-belt radiators are welded into a radiator tube with a brass strip and bent into a heat sink with a thin copper strip.
In order to further improve the performance of the copper heat sink and enhance its competitiveness in the aluminum heat sink, many improvements have been made. In terms of material, adding trace elements to copper to increase the strength and softening point without losing thermal conductivity, thereby reducing the thickness of the strip and saving the amount of steel; in the manufacturing process, using high frequency Or laser-weld copper tubes and use steel brazing to replace the solder-welded radiator cores that are susceptible to lead contamination. The results of these efforts are shown in Table 6.2. Compared to brazed aluminum heat sinks, the new copper heat sinks are lighter in weight and significantly smaller in size under the same heat dissipation conditions, ie under the same air and coolant pressure drop; In addition, steel has good corrosion resistance and long service life, and the advantages of copper radiator are more obvious. In addition, in order to promote environmental protection and vigorously promote and develop electric vehicles, the amount of steel used in each vehicle will increase exponentially.