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A Melting and Casting Production Process for Improving Oxidation Streaks of Aluminum Alloy Profiles
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A technology of aluminum alloy profile and production process, which is applied in the field of aluminum alloy melting and casting, and can solve problems such as stripes, many factors involved, loss, etc.
Active Publication Date: 2019-08-06
GUANGYA ALUMINUM
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Problems solved by technology
Conventional surface quality problems are mainly spots, chromatic aberrations, stripes, black lines, etc. after oxidation. There are many factors involved, which cause great losses and trouble the majority of suppliers.
Method used
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Embodiment
[0051] Embodiment group B: Step 1, respectively the following proportioning raw materials: 0.41% silicon, 0.49% magnesium, 0.13% iron, 0.01% copper, 0.01% manganese, 0.01% zinc, 0.01% other The single item of impurities, and the remaining proportions are all aluminum;
[0052] Step 2: Put the raw materials in Step 1 into a 20-ton gas-fired regenerative melting furnace and melt them completely. Insert a thermocouple 1 meter below the liquid surface to measure the melting temperature; the amount of slag-removing agent reaches 1.3kg / T aluminum liquid.
[0053] Step 3: Refining temperature is set according to Table 4. Refining is carried out 3 times in total, and each refining time is 25 minutes. The mixed blowing method of nitrogen and solvent is used. The amount of refining agent is 1.2kg / T aluminum liquid, and Al-Ti is not added during the refining process. - Line B;
[0054] Step 4, the measured alloy composition is qualified before standing, and the standing time is 25 minut...
Embodiment 8
[0064] The product surface condition of embodiment 8 is as figure 2 Shown in (a); The surface condition of embodiment 11 is as figure 2 Shown in (b); Embodiment 7 product surface condition is as figure 2 (c) shown.
[0065] The existing melting and casting method is: Si is 0.46%, Fe is 0.12%, Cu is 0.018%, Mn is 0.02%, Mg is 0.58%, Zn is 0.018%, Ti is 0.024%, Cr is 0.026%, The single impurity is 0.007%, the total impurity is 0.07%, and the rest are Al raw materials put into the melting furnace for smelting. During the smelting process, the temperature is controlled at 730°C. In step c, the temperature of the molten aluminum is controlled at 750°C for refining and slag removal. Use anhydrous nitrogen to blow the slagging agent into the molten aluminum through the refining tank to separate the aluminum slag and loosen the slag at the same time to facilitate cleaning. At this time, the temperature is controlled at 720°C. In step e, after the furnace After passing the test, ...
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Abstract
The invention relates to a casting production process for improving oxidative stripes of aluminum alloy sections. The casting production process comprises the following steps: step one, preparing a raw material from the following components in percentages by mass: 0.37-0.41% of silicon, 0.47-0.49% of magnesium, less than or equal to 0.13% of iron, less than or equal to 0.01% of copper, less than or equal to 0.01% of manganese, less than or equal to 0.01% of zinc, less than or equal to 0.01% of other impurities and the rest of aluminum; step two, smelting the raw material at the temperature of725-745 DEG C; step three, refining at the temperature of 730-750 DEG C; step four, leaving molten aluminum standstill; step five, casting at the temperature of 700-720 DEG C at the casting speed of 115-130 mm / min to form a cast stick; and step six, carrying out homogenization treatment on the cast stick.
Description
technical field [0001] The invention relates to the technical field of aluminum alloy melting and casting, in particular to a melting and casting production process for improving oxidation streaks of aluminum alloy profiles. Background technique [0002] With the vigorous development of aluminum extrusion technology in recent years, aluminum alloy extrusion profiles have been widely used in aerospace, rail transit, architectural decoration, 3C electronic products, printing and packaging and other fields. Among them, 3C electronic products, led by smart terminals, continue to provide users with new experiences in terms of appearance industrial design, texture and aesthetics. In particular, aluminum alloy casings represent an important direction of appearance innovation and have formed large-scale applications. [0003] Unlike conventional aluminum alloy profiles that focus on strength, plasticity, and corrosion resistance, profiles for 3C electronic products pay more attentio...
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