Intermediate-strength aluminium alloy rod and preparation method thereof
A medium-strength aluminum alloy and alloy liquid technology, which is applied in the field of aluminum alloys, can solve the problems that medium-strength aluminum alloys cannot obtain properties, and achieve the effects of good mechanical properties and corrosion resistance, prevention of strength loss, and reasonable deformation.
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[0029] Reference figure 1 The present invention provides a method for preparing a medium-strength aluminum alloy rod, which includes the following steps:
[0030] S1: Melting: Melting aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, magnesium ingots, and aluminum-rare earth alloys at 720-750℃ to form alloy liquid, and then degassing and refining at 730-740℃, and then at 720-730 Keep holding at ℃ for 30-50 minutes, and cast to obtain ingots; adjust the composition of the alloy liquid before casting, and the composition of the alloy liquid after control includes: iron ≤ 0.30%, silicon 0.30-0.50%, magnesium 0.30-0.50% , Rare earth 0.10-0.15%, the balance is aluminum;
[0031] S2: Rolling: the ingot obtained by S1 is water-cooled and then hot-rolled to obtain a hot-rolled aluminum alloy rod after cooling;
[0032] S3: Aging: the hot-rolled aluminum alloy rod obtained by S2 is artificially aged, the artificial aging temperature is 150-160℃, and the artificial aging time i...
Example Embodiment
[0034] Example 1
[0035] The method for preparing a medium-strength aluminum alloy rod proposed in this embodiment includes the following steps:
[0036] S1: Melting: Put the aluminum ingot into the melting furnace. After the aluminum ingot is melted into liquid at 740℃, add aluminum-silicon alloy, aluminum-iron alloy, aluminum-rare earth alloy, and wait for aluminum-silicon alloy, aluminum-iron alloy, aluminum -After the rare earth alloy is melted, magnesium ingot is added to form alloy liquid, refining agent is added at 735°C for degassing and refining, kept at 725°C for 40 minutes, and cast to obtain an ingot;
[0037] Among them, the composition of the alloy liquid is adjusted before casting, and the composition of the alloy liquid after adjustment includes by weight fraction: iron 0.20%, silicon 0.40%, magnesium 0.40%, rare earth 0.12%, and the balance is aluminum;
[0038] During the degassing refining process, the amount of refining agent added is 0.35% of the charge weight, a...
Example Embodiment
[0041] Example 2
[0042] The method for preparing a medium-strength aluminum alloy rod proposed in this embodiment includes the following steps:
[0043] S1: Melting: Put the aluminum ingot into the melting furnace. After the aluminum ingot is melted into liquid at 750℃, add aluminum-silicon alloy, aluminum-iron alloy, aluminum-rare earth alloy, and wait for aluminum-silicon alloy, aluminum-iron alloy, aluminum -After the rare earth alloy is melted, magnesium ingot is added to form an alloy liquid, refining agent is added at 740°C for degassing and refining, and the temperature is kept at 730°C for 30 minutes, and the ingot is obtained by casting;
[0044] Among them, the composition of the alloy liquid is adjusted before casting, and the composition of the alloy liquid after the adjustment includes by mass fraction: iron 0.23%, silicon 0.30%, magnesium 0.50%, rare earth 0.10%, and the balance is aluminum;
[0045] In the process of degassing refining, the amount of refining agent ad...
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