Aluminum die-casting alloy for digital electronic product
An electronic product, cast aluminum alloy technology, applied in the field of aluminum alloy, can solve the problem of low specific strength, achieve the effect of inhibiting the deterioration of fatigue performance and ensuring performance
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[0017] Examples 1-3, and Comparative Examples 1-5:
[0018] 1) Preparation of raw materials: prepare raw materials according to the alloy composition ratio in Table 1. Among them, pure aluminum with purity of 99.9%, aluminum-silicon alloy with silicon content of 12-15%, aluminum-zinc alloy with zinc content of 10-15, electrolysis Raw materials such as copper, electrolytic nickel, industrial pure magnesium, industrial pure zirconium, and industrial pure titanium.
[0019] 2) Melting: first preheat the above-mentioned raw materials to at least 200°C, then place pure aluminum in a melting furnace to heat up to 800°C, then add electrolytic copper, electrolytic nickel, industrial pure zirconium and pure titanium, and continue stirring until All the raw materials are melted, then the temperature is reduced to 720°C and the aluminum-silicon alloy and aluminum-zinc alloy are added and stirring is continued until the raw materials are completely melted. Then the temperature is reduced to 66...
Example Embodiment
[0041] In Examples 6-7, and Comparative Examples 14-18, the chemical composition of the alloy is the same as that of Example 2. The optimization of the parameters of the electrolyte composition in the two anodic oxidations is mainly investigated. The selection of parameters and performance results are shown in Table 3. , Wherein the current density, voltage and oxidation time are the same as in Example 2.
[0042] table 3
[0043]
[0044] In addition to the experiment in Table 3, the conventional CAA method and SAA method were used to anodize the aluminum alloy with the same composition, and the fatigue strength of the aluminum alloy was only 2×10. 4 About orders of magnitude, far inferior to this application.
[0045] The above results show that the composition of the two anodization has an important influence on the fatigue strength of the alloy. First, the two anodization has obvious advantages over the fatigue strength of the single anodization, and secondly, the application is ...
Example Embodiment
[0047] In Examples 8-9, and Comparative Examples 19-22, the chemical composition of the alloy is the same as that of Example 2. The optimization of the current density, voltage and oxidation time in the two anodizations, the selection of parameters and the performance are mainly investigated The results are shown in Table 4, in which the composition of the electrolyte is the same as in Example 2.
[0048] Table 4
[0049]
[0050] It can be seen from the results in Table 4 that the current density of anodic oxidation cannot be too small, otherwise it will make the order of the oxide film’s pores difficult to meet the requirements and become the source of fatigue damage, but the current density cannot be too large, otherwise it will cause pores. Excessive pit depth can also become a source of fatigue failure. The oxidation time cannot be too short, otherwise it cannot meet the basic requirements of anodization, and it is not conducive to improving the order of the pores, but it can...
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