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High-zinc, low-copper aluminum alloy with excellent corrosion resistance and preparation method thereof

A copper-aluminum alloy, corrosion-resistant technology, applied in the field of alloy materials, can solve problems such as lack of mature theory

Active Publication Date: 2021-04-30
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is still a lack of mature theories to explain the corrosion performance theoretically.

Method used

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  • High-zinc, low-copper aluminum alloy with excellent corrosion resistance and preparation method thereof
  • High-zinc, low-copper aluminum alloy with excellent corrosion resistance and preparation method thereof
  • High-zinc, low-copper aluminum alloy with excellent corrosion resistance and preparation method thereof

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Embodiment

[0019] This embodiment is only used to illustrate the effects of the present invention. The smelting method in this example is a special small-batch smelting method adopted in the laboratory. The smelting is carried out under the protection of argon gas, and the degassing and other processes in actual production are omitted. In actual production, it can be smelted according to the degassing and refining method of 7 series aluminum alloys, which can further improve the quality and performance of ingots, such as strength, plasticity, and porosity.

[0020] Carry out batching according to Table 1 with weight percentage. The metal blocks of Al, Zn, Mg, Cr and Y have a purity greater than 99.9% and a total weight of 20g. In order to supplement the volatilization loss of Zn during smelting, the excess weight of Zn is 3%.

[0021] serial number Zn(g) Mg(g) Cu(g) Al-Cr(g,10%Cr) Y(g) Al(g) ① 2.266 0.4330 0.34 0.14 0.0000 16.90 ② 2.266 0.4326 0.3...

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Abstract

A high-zinc, low-copper aluminum alloy with excellent corrosion resistance and a preparation method thereof, belonging to the technical field of aluminum alloy materials, the content of each element in the metal material is Zn=10-11wt.%, Mg=1.8 according to the mass fraction ‑2.0wt.%, Cu=0.97‑1.0wt.%, Cr=0.08‑0.1wt.%, Y=1.4‑2.0wt.%, Al=balance. The corrosion of the grain boundary phase of the alloy is greatly suppressed, and the corrosion resistance performance is greatly improved, which is close to the level of pure aluminum. Under the grain size of 30um, the alloy of the present invention can reach about 195N / mm 2 The hardness is equivalent to a tensile strength of about 630MPa.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a corrosion-resistant aluminum alloy composition and a processing method thereof. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has important applications in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Among them, the 7 series Al-Zn-Mg(Cu) aluminum alloy is characterized by low density, high strength and hardness, and is especially suitable for the aerospace industry. However, low stress brittle fracture often occurs in such high-strength aluminum alloys. Under the joint action of stress and environmental medium, this failure stress is far lower than the failure stress (ie tensile strength) of the material itself. Therefore, in aircraft structural materials, corrosion-resistant aluminum alloys have always been an important research ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 杨育奇严平司恒刚王磊肖绮周晨曦张志勇方嘉文
Owner JIANGXI UNIV OF SCI & TECH
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