Al-Mg-Si alloy and preparation method and application thereof

An al-mg-si and alloy technology, applied in the field of aluminum alloys, can solve problems such as increased residual stress, dimensional deformation, and reduced yield, and achieve the effects of reducing the overall percentage content, improving extrusion fluidity, and improving production efficiency

Active Publication Date: 2022-04-08
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the GB/T 14846-2014 standard is adopted for the dimensional deviation of 6-series aluminum alloy profiles. In the process of processing 6-series aluminum alloy profiles in related technologies, in order to satisfy the saturated solid solution of the strengthening phase and achieve the corresponding strength, relatively high High cooling intensity, but the cooling intensity is too fast and too large, resulting in uneven distribution of residual stress during quenching, resulting in increased residual stress after quenching of the pro

Method used

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  • Al-Mg-Si alloy and preparation method and application thereof
  • Al-Mg-Si alloy and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0073] The present embodiment is a kind of Al-Mg-Si alloy, and specific content is:

[0074] Si 0.5%, Mg 0.84%, Cu 0.18%, Mn 0.015%, Cr 0.059%, Zn 0.016%, Ti 0.0099%, Fe 0.11% by weight percentage, and the balance is Al for material preparation.

[0075] Magnesium ingots: Magnesium ingots with the brand Mg9990 are used, and the mass percentage of Mg in the magnesium ingots is more than 99.9%, which meets the standard GB / T 3499-2003 "Primary Magnesium Ingots";

[0076] Alloy additive (aluminum silicon): AlSi1 is used 2 Master alloy, the quality conforms to the YS / T282-2000 standard;

[0077] Aluminum copper: AlCu40 master alloy is used, and the quality meets the YS / T282-2000 standard;

Embodiment 2

[0079] In this embodiment, an aluminum alloy is prepared, and the specific process is as follows:

[0080] S1a. Mix the various raw materials in Example 1 with solid waste and electrolytic aluminum water according to the weight percentage, heat to 750°C, melt the material, keep it warm for 4h, and carry out refining treatment in the furnace, stand still, and the temperature is not lower than 730°C to obtain aluminum alloy;

[0081] S1b. After standing still for 10 minutes, the aluminum alloy is added with Al-Ti-B wire and fed at a rate of 5-10mm / s. After being degassed by graphite rotor and filtered by ceramic plate, semi-continuous casting is carried out, and the casting diameter is 228mm. standard round ingot;

[0082] S2. After passing the above process, cast an aluminum alloy round ingot for homogenization treatment at 540°C for 2 hours and 565°C for 8 hours, and cool to room temperature within 1 hour by water mist cooling + air cooling.

[0083] S3a: cutting off the hea...

Embodiment 3

[0090] In this embodiment, an aluminum alloy is prepared, and the specific process is as follows:

[0091] S1a. Mix the various raw materials in Example 1 with solid waste and electrolytic aluminum water according to the weight percentage, heat to 750°C, melt the material, keep it warm for 4h, and carry out refining treatment in the furnace, stand still, and the temperature is not lower than 730°C to obtain aluminum alloy;

[0092] S1b. After standing still for 10 minutes, the aluminum alloy is added with Al-Ti-B wire and fed at a rate of 5-10mm / s. After being degassed by graphite rotor and filtered by ceramic plate, semi-continuous casting is carried out, and the casting diameter is 228mm. standard round ingot;

[0093] S2. After passing the above process, cast an aluminum alloy round ingot for homogenization treatment at 540°C for 2 hours and 565°C for 8 hours, and cool to room temperature within 1 hour by water mist cooling + air cooling.

[0094] S3a: cutting off the hea...

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Abstract

The invention discloses an Al-Mg-Si alloy as well as a preparation method and application thereof. The invention relates to an Al-Mg-Si alloy which comprises the following components in percentage by weight: 0.48 to 0.54 percent of Si, 0.82 to 0.87 percent of Mg, 0.16 to 0.22 percent of Cu, 0.015 to 0.03 percent of Mn, 0.04 to 0.08 percent of Cr, 0.009 to 0.03 percent of Ti, 0.016 to 0.03 percent of Zn and the balance of Al and impurities, and the sum of the weight percent of Mg and the weight percent of Si is 1.30 to 1.38 percent. The mass ratio of the Si to the Mg is 1: (1.52-1.82). Through material component optimization and process setting, the problem of high quenching sensitivity of the aluminum alloy material in quenching heat treatment is solved, and the problem of low yield caused by quenching heat treatment of the aluminum alloy section under the condition of considering the performance indexes of the alloy is solved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an Al-Mg-Si alloy and a preparation method and application thereof. Background technique [0002] New energy vehicles have developed rapidly in recent years. Compared with traditional vehicles, new energy vehicles have the advantages of energy saving and emission reduction. Most of the transmission shaft, battery tray, bumper, body, etc. are made of steel materials. In new energy vehicles, 6-series aluminum alloys are gradually used to replace the above-mentioned steel materials. Under this condition, the steel parts and aluminum parts of the same car, The use of 6-series aluminum alloys as materials can reduce the weight of the car body by 2 / 3 and achieve light weight in the true sense; at the same time, 6-series aluminum alloys can achieve high strength and high corrosion resistance through heat treatment. In addition, 6-series aluminum alloys also have good welding pro...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22F1/047B21C23/14B21C29/00B21C35/03
Inventor 罗水华黄健华周旺周武军李建湘李信
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD
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