Aluminium alloy material for car radiator cooling flat tube

Abstract

The invention relates to an aluminum alloy material for a radiator cooling flat pipe used in an automobile, belonging to the aluminum alloy material technical field. The material is mainly characterized in that aluminum-manganese alloy with a certain component is added with proper amount of mixed type rare earth(RE) taking Ce as main materials for smelting and casting. Experiments show that the rare earth element has refined action on secondphase such as eutectic phase and exsolution precipitate phase by observing fine texture of the aluminum alloy material containing the mixed type rare earth, and a plurality of small pits of electrochemical corrosion are not found in the texture of the aluminum-manganese alloy added with rare earth, which means that the corrosion resistance of the aluminum-manganese alloy added with rare earth is improved; and the corrosion behavior of the alloy material is tested by the zeta potential scanning polarization curve test technology, which shows that the corrosion resistance of the aluminum-manganese alloy added with rare earth is improved to some extent. The aluminum material provided by the invention can be directly made into the aluminum flat pipe by drawing, and also be used to process plate materials to be manufactured into radiator ribs, and the radiator ribs are not collapsed in the high temperature brazing.

Description

technical field [0001] The invention relates to an aluminum alloy material for cooling flat tubes of vehicle radiators, which is an aluminum alloy material with excellent corrosion resistance and can be used for drawing cooling flat tubes, and belongs to the technical field of aluminum alloy materials. Background technique [0002] The structural form of the core of the radiator for vehicles mainly includes two types: the tube-fin type and the tube-belt type. The core of the tube-band and tube-fin radiators is composed of many thin cooling tubes and cooling fins (radiating strips), and most of the cooling tubes use flat circular cross-sections. [0003] After retrieval, the patent application number 02821519.2 reported an aluminum alloy used to manufacture heat sink materials, which has the following composition by weight percentage: Si≤1.2, Mn≤0.05, Mg≤0.05, Fe≤2.0, 0.5≤Ni ≤1.5, 0.05≤Cu≤1.0, 0.5≤Zn≤4.0 and / or Ti<0.01 and / or Cr<0.01 and / or Zr<0.01, each of other el...

AI Technical Summary

Problems solved by technology

Existing aluminum alloy foils for automobile radiators have high passivation strength, and under the action of external conditions, it is difficult to peel off completely and become general corrosion, and pitting corrosion usually occurs, so it is difficult to play a protective role

Corrosion of the medium channel reduces the anti-corrosion life of the radiator

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