Preparation method of aluminum alloy material for semi-solid die casting of 5G cooling shell

Abstract

The invention relates to a preparation method of an aluminum alloy material for semisolid die casting of a 5G cooling shell. The preparation method comprises the following step I of collecting A356 aluminum alloy waste; and the step II of melting the A356 aluminum alloy waste collected in the step I in a smelting furnace, sampling and measuring the initial concentration of Sr in secondary aluminum; the step III of calculating the flux adding amount according to the initial concentration of the Sr, wherein the flux components comprise NaCl, KCl and AlF3; the step IV of putting the flux into a powder spraying tank according to the flux adding amount calculated in the step III, and completely spraying flux particles into the bottom of an aluminum melt by taking nitrogen as a carrier; the step V of letting the aluminum melt stand, and meanwhile removing dross on the surface of the aluminum melt; and the step VI of sampling and measuring the residual concentration of the Sr until the residual concentration of the Sr reaches a preset target, removing the Sr, and pouring into an aluminum ingot for later use. According to the method, materials with wide sources are utilized to regenerate and manufacture products with large market gaps, and the market competitiveness and commercial value of the preparation method are improved.

Description

technical field [0001] The invention relates to the field of recycled aluminum alloys, in particular to a method for preparing an aluminum alloy material used for semi-solid die-casting of a 5G cooling case. Background technique [0002] With the development of 5G communication technology, the demand for high thermal conductivity aluminum-silicon alloy materials is growing rapidly. Compared with the 4G era, 5G communication base stations have higher power, higher energy consumption, and larger volume, requiring materials with high thermal conductivity and light weight. Therefore, aluminum alloys are widely used in the field of 5G communications. Among them, A356 aluminum alloy is not only suitable for semi-solid die-casting, but also can meet the requirements of high thermal conductivity and light weight. It is widely used in heat dissipation housings of 5G base stations with complex structures. [0003] In order to reduce production costs, it is an important trend to use A...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used method of removing Sr is mainly to let Sr oxidize and burn in the aluminum melt and remove it by slag removal, but this method takes a long time, about 4-6 hours, and will seriously affect production efficiency and increase energy costs

Another method is to combine B and Sr to form an intermetallic compound by adding B element to achieve the purpose of fixing Sr, but the Sr element will not leave the aluminum melt, which will affect the composition of the aluminum alloy.

Therefore, when faced with the use of A356 recycled aluminum to manufacture 5G base station heat dissipation housings, there is a lack of a more efficient Sr removal method

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