Bright-color squeeze casting aluminum alloy capable of being anodized and preparation method of bright-color squeeze casting aluminum alloy

Abstract

The invention relates to bright-color squeeze casting aluminum alloy capable of being subjected to anodic oxidation and a preparation method of the bright-color squeeze casting aluminum alloy. The bright-color squeeze casting aluminum alloy comprises the following elements in percentage by mass: 0.5 wt%-2.5 wt% of Mn, 0.05 wt%-0.2 wt% of Fe, 0 wt%-0.5 wt% of Mg, 0 wt%-0.5 wt% of Zn, 0 wt%-0.2 wt% of Co, 0 wt%-0.05 wt% of Zr, 0 wt%-0.2 wt% of Cr, 0.005 wt%-0.15 wt% of Ti, 0.005 wt%-0.2 wt% of RE, 0 wt%-0.5 wt% of other impurities and the balance of Al. Compared with the prior art, the method has the advantages that a more uniform and refined crystal tissue structure is obtained through two modes of grain refinement and tissue uniformity, so that the surface of a final extrusion casting product can be used as a bright anode, and the surface consistency is achieved.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a bright-color anodic oxidizable squeeze-cast aluminum alloy and a preparation method thereof. Background technique [0002] The surface of aluminum and its alloys is easy to form an extremely thin layer of amorphous aluminum oxide film, which makes the surface of aluminum parts lose their original gloss. In addition, the oxide film is loose, porous and easily stained. Therefore, aluminum and its alloy products usually need to be anodized. [0003] At present, there are also a large number of anodizable aluminum alloy structural parts available on the market, but the process uses aluminum plates to complete the product processing through a large number of CNC equipment, the processing cost is relatively high, the production efficiency is very low, and the production cost is high. At the same time, raw materials A lot of waste, not environmentally friendly. [0004] Patent CN201710666119.6 ...

AI Technical Summary

Problems solved by technology

However, this invention adopts a semi-solid molding process, which is relatively complicated and requires semi-solid molding equipment and preparation of semi-solid slurry, which requires high technology and is difficult and costly in large-scale industrial applications.

And its Zn content is 1.2-1.5. If the Zn content is too high, different colors and segregation will occur in the bright color anode with large plane.

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