Aluminum foil used for 6811 alloy automotive radiator and preparing method thereof

Abstract

The invention discloses aluminum foil used for a 6811 alloy automotive radiator and a preparing method thereof. The aluminum foil comprises, by weight, 0.45%-0.55% of iron, 1.05%-1.25% of manganese, 0.44%-0.58% of silicon, 0.01%-0.05% of magnesium, 0.10%-0.15% of copper and 1.4%-1.6% of zinc, the weight percentage of titanium, the weight percentage of nickel, the weight percentage of chromium and the weight percentage of zirconium are smaller than 0.045%, the content of unavoidable single impurity is smaller than 0.05%, the total content of unavoidable impurities is smaller than 0.15%, and the balance aluminum. The process is simple, energy is saved, and the yield is higher than that of hot rolling by 15%; a researched and developed product is low in cost, good in plate shape, excellent in welding performance and conducting performance, and stable in quality and performance when used by users.

Description

technical field [0001] The invention belongs to the technical field of aluminum plate and strip processing, and relates to an aluminum foil for a 6811 alloy automobile radiator and a preparation method thereof. Background technique [0002] 6811 alloy is mainly used to process aluminum foil for automobile radiators. At present, domestic and foreign manufacturers mainly produce it through hot-rolled blanks. Its traditional process is: melting - semi-continuous casting - sawing the head and tail of the ingot - homogenizing annealing - milling - heating - hot rolling - cutting head and tail - coiling - hot rolled coil. Disadvantages of this traditional process: high energy consumption, low yield, high cost, and difficult control of plate shape. [0003] Due to the high content of manganese and zinc in the 6811 alloy, the range of the two-phase zone composed of solid phase and liquid phase increases during the casting and rolling process of the cast-rolled strip, so that the 68...

AI Technical Summary

Problems solved by technology

Disadvantages of this traditional process: high energy consumption, low yield, high cost, and difficult control of plate shape

[0003] Due to the high content of manganese and zinc in the 6811 alloy, the range of the two-phase zone composed of solid phase and liquid phase increases during the casting and rolling process of the cast-rolled strip, so that the 6811 alloy should be within the range of the casting-rolling zone of about 5cm. It is very difficult to complete crystallization and rolling within 2 to 3 seconds, so there is no use of continuous casting on casting and rolling machines to produce 6811 alloy cast rolling plates at home and abroad.