Aluminium alloy refining method

Abstract

The invention discloses an aluminium alloy refining method which comprises the step of spraying a refining agent in aluminium alloy fused solution by adopting the mixing blowing method of inert gas-refining agent. The refining agent comprises MgCl2 and KCl. With adoption of the aluminium alloy refining method, nonmetallic inclusion, hydrogen, sodium, calcium, lithium and the like in aluminium alloy can be effectively removed, the pinhole first-grade rate of an aluminium alloy product can be remarkably increased, the physical performance of aluminium alloy is improved, and the fractograph of aluminium alloy also can be improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular, the invention relates to a method for refining aluminum alloys. Background technique [0002] Aluminum alloy is widely used in various fields such as aerospace, automobile, machinery and electronics because of its advantages such as low density, high specific strength, good plasticity, good electrical and thermal conductivity, good corrosion resistance, rich resources and easy processing. However, casting aluminum alloys may cause a series of defects in castings during the smelting process, such as pinholes, pores and slag inclusions. Therefore, how to improve the melting quality of aluminum alloy needs further study. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an object of the present invention is to propose a method for refining aluminum alloys. The metho...

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Problems solved by technology

However, the cast aluminum alloy may cause a series of defects in the casting during the smelting process, such as pinholes, pores and slag inclusions, etc.

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