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High-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material and preparation method thereof

An aluminum alloy and corrosion-resistant technology, applied in the field of aluminum profiles, can solve problems such as restricted application, poor corrosion resistance, and aluminum needs to be improved, and achieve the effect of improving mechanical strength and corrosion resistance, and solving low strength.

Inactive Publication Date: 2017-04-05
HUNAN RARE EARTH METAL MATERIAL RES INST
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Problems solved by technology

[0003] However, the strength of aluminum still needs to be improved. At present, the strength of ordinary aluminum alloys is generally about 400MPa. Although the strength of some aluminum alloys has been improved, their corrosion resistance is poor, which restricts their application to a certain extent.

Method used

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  • High-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material and preparation method thereof
  • High-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material and preparation method thereof
  • High-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material and preparation method thereof

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preparation example Construction

[0033] As shown in Figure 1, the preparation method of the high-strength corrosion-resistant Al-Zn-Mg-(Cu) series aluminum alloy rod of one embodiment includes:

[0034] S110, heating the induction furnace to a red state, cleaning the graphite crucible, adding pure Al and heating to melt, then stop heating;

[0035] S120, add pure Cu, pure Zn and intermediate alloy, add pure Mg after fully stirring, pass through argon or hexachloroethane for melting protection and refining;

[0036] S130, after removing the surface scum, leave it to stand for 10-15 minutes, pour it into an iron mold, and cool it naturally to form an ingot;

[0037] S140. After the ingot is homogenized and annealed at 470°C for 18 hours, hot extrusion is carried out at 450°C, and then solution treatment is carried out at a temperature of 480°C. After water quenching, the ingot is kept at 160°C for 18 hours. A high-strength and corrosion-resistant Al-Zn-Mg-(Cu) aluminum alloy rod is formed, and the high-strengt...

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Abstract

A high-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material includes, by mass, 5.6-10% of Zn, 1.86-5% of Mg, 1.3-3.5% of Cu, 0-0.3% of Sc, 0-0.3% of Y, 0.1-0.5% of Ce, 0-0.2% of Si, 0-0.3% of Fe, 0-0.3% of Mn, 0-0.2% of Ti, 0-0.3% of Cr, not more than 0.15% of impurities, and the balanced being Al. The invention also provides a preparation method of the high-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy rod material. According to the high-strength anti-corrosion Al-Zn-Mg-(Cu)-series aluminum alloy and the preparation method thereof, by adding the Ce in trace amount and Y and / or Sc micro-alloying elements to the aluminum alloy, the aluminum alloy is effectively improved in mechanical strength. The invention solves the problem of low strength in the aluminum alloy rod materials.

Description

technical field [0001] The invention relates to the field of aluminum profiles, in particular to a high-strength and corrosion-resistant Al-Zn-Mg-(Cu) aluminum alloy bar and a preparation method thereof. Background technique [0002] The density of aluminum is small (ρ=2.7g / cm3), about 1 / 3 of that of iron, and its melting point is low (660°C). Aluminum has a face-centered cubic structure, so it has high plasticity (δ: 32-40%, ψ : 70~90%), easy to process, can be made into various profiles and plates, and has good corrosion resistance; but the strength of pure aluminum is very low, and the σb value in the annealed state is about 8kgf / mm2, so it is not suitable for structural materials. Through long-term production practice and scientific experiments, people have gradually strengthened aluminum by adding alloying elements and using heat treatment, which resulted in a series of aluminum alloys. The alloy formed by adding certain elements can have high strength while maintainin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
Inventor 段林昆李志邱从章杨瑞芳崔昌华
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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