Aluminium alloy material with good forging and pressing property

Abstract

The invention relates to an aluminium alloy material with good forging and pressing property. The aluminium alloy material comprises the following components in percentage by mass: 4.8-5.0% of copper, 0.3-0.35% of tin, 0.35-0.50% of bismuth, 0.6-0.65% of zinc, 0.03-0.045% of iron, 0.01-0.015% of chromium, 0.01-0.25% of magnesium and the balance of inevitable impurities. The magnesium is added to the aluminium alloy material, so that on the one hand, the skeleton strength of the copper in the aluminium alloy can be improved, and on the other hand, cracks are prevented from occurring by increasing the size of the magnesium, tin, bismuth and zinc compound and reducing the coefficient of thermal deformation.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to an aluminum alloy material with good forging performance. Background technique [0002] In order to make the aluminum alloy have good forging performance, it is generally to add lead to the aluminum alloy to improve its forging performance. However, due to the harmfulness of lead to the environment and the human body, it is necessary to find an aluminum alloy material that can replace lead. [0003] The prior art proposes to add tin and bismuth to the aluminum alloy material to produce an aluminum alloy with good forging performance, but compared with lead aluminum alloy, its brittleness increases, and the aluminum alloy will have cracks during hot forging. [0004] In order to overcome the above-mentioned defects, there are existing technologies that add zinc to the aluminum alloy with tin and bismuth to reduce the brittleness of the aluminum alloy and reduce the possibility of c...