Triply aluminum circle is composed of 3003 aluminum alloy, 6A02 aluminum alloy and 3003 aluminum alloy. It is characterized in that the thickness ratio of the three aluminum alloys is 1: (8 ￣ 15): 1. This kind of structure of aluminum alloy composite plate makes the Mg element in the core material of aluminum alloy composite plate 6A02 change into mg steam, which is blocked by 3003 aluminum alloy on the upper and lower surfaces and can not volatilize to the surface of the parts, so that the Mg steam can not react with other gases in the furnace or with the flux on the surface of the parts, which improves the welding Quality, can make the assembly of the oil cooler successfully complete the protective atmosphere brazing, greatly improve the production efficiency of the oil cooler, reduce the production cost.



This triply aluminum circle The utility model is used for brazing and processing the bottom plate of automobile oil cooler, including the top material 3003 aluminum alloy, the core material 6A02 aluminum alloy and the lower skin material 3003 aluminum alloy. The three kinds of aluminum alloys are formed by superposition in sequence. The thickness ratio of the three aluminum alloys is 1:10.5:1; the triply aluminum of the top material 3003 aluminum alloy, the core material 6A02 aluminum alloy and the lower skin material 3003 aluminum alloy is formed The tensile strength of the circle is 95-150mpa, the yield strength is not less than 85mpa, and the elongation is not less than 20%; the tensile strength, yield strength and elongation of this triply aluminum circle are greater than 120MPa, 50MPa and 20% respectively.