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A high-strength and corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles

A preparation process and aluminum alloy technology, which is applied in the field of high-strength and corrosion-resistant 5383 aluminum alloy and marine profile preparation process, can solve the problems that cannot meet the application requirements of marine materials, the price of rare earth elements is expensive, and the dimensional accuracy is difficult to control. Strong corrosion resistance, good corrosion resistance, good processability and high production efficiency

Active Publication Date: 2021-11-02
中铝特种铝材(重庆)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main strengthening method of 5083 alloy material is work hardening, that is, by applying a large amount of deformation to the material, a large number of high-density dislocations are introduced through the "cold work hardening" of cold plastic deformation at room temperature, resulting in "work hardening" of the material. Strengthening treatment is carried out on the material. The main production and preparation method is plate rolling processing. The ingot after homogenization treatment is prepared through multiple passes of intermediate annealing, hot rolling, cold rolling and other processes. The production process is extremely complicated.
[0005] According to data reports, 5383 alloy belongs to the 5XXX series alloy with high Mg content. In order to improve the performance indicators such as strengthening ability and corrosion resistance of 5383 alloy, most enterprises mainly realize it by adding rare earth elements such as Sc and Er, but the price of rare earth elements is expensive. , leading to high cost
In order to reduce costs, some companies have developed 5383 aluminum alloys that are actually 5083 aluminum alloys in terms of alloy composition and ratio. In essence, they are 5383 aluminum alloys obtained by increasing the amount of deformation of 5083 aluminum alloys. Therefore, in order to meet the mechanical performance standards of high-strength marine aluminum alloy skeleton profiles, a large amount of cold processing must be done to the material during stretching and straightening. The corrosion resistance of the material decreases, which cannot meet the actual application requirements of marine materials

Method used

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  • A high-strength and corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles
  • A high-strength and corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles
  • A high-strength and corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles

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Experimental program
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Embodiment 1

[0037] See figure 1 , a marine profile preparation process, which mainly includes:

[0038] Calculate the amount of 5383 aluminum alloy raw materials, and prepare the aluminum alloy raw materials according to the ratio. The mass percentage ratio of each element of the 5383 aluminum alloy raw materials is as follows:

[0039] element Si Fe Cu mn Mg Cr Zn Ti Zr Impurities Al content 0.12 0.18 0.07 0.88 4.6 0.05 0.33 0.03 0.12 0.15 margin

[0040] B. Casting: Add the prepared 5383 aluminum alloy raw materials into the smelting furnace and mix them evenly to melt into liquid aluminum alloy. The water-cooled casting method melts and casts 5383 aluminum alloy ingots with a round rod structure;

[0041] C. Homogenization: Homogenize the 5383 aluminum alloy ingot, specifically, adopt two-stage soaking, the first-stage soaking temperature is 410°C, the holding time is 10h, and the second-stage soaking temperature is 510°C , the holdi...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is that the mass percentage ratio of each element of the 5383 aluminum alloy raw material in step A is as follows:

[0048] element Si Fe Cu mn Mg Cr Zn Ti Zr Impurities Al content 0.12 0.18 0.06 0.75 4.3 0.05 0.29 0.03 0.09 0.15 margin

Embodiment 3

[0050] The difference between embodiment 3 and embodiment 1 is that the mass percentage ratio of each element of the 5383 aluminum alloy raw material in step A is as follows:

[0051] element Si Fe Cu mn Mg Cr Zn Ti Zr Impurities Al content 0.12 0.18 0.06 0.90 4.8 0.05 0.37 0.03 0.15 0.15 margin

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Abstract

The invention discloses a high-strength and corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles. The 5383 aluminum alloy has the advantages of high structural strength, corrosion resistance and good processability, and takes into account mechanical properties, corrosion resistance and production. cost; and, the preparation process is simple, and the produced profiles are not only controllable in size and low in defect rate, but also have higher dimensional accuracy, and the yield strength can reach more than 220MPa, which is 10% higher than that of the existing 5383 aluminum alloy profiles. More than %, the strength of the profile is greatly improved, and at the same time, the production efficiency is high, and the corrosion resistance of the material is strong, and a high-strength and corrosion-resistant high-strength aluminum alloy extruded profile for ships is obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of aluminum alloy profiles, in particular to a high-strength, corrosion-resistant 5383 aluminum alloy and a preparation process for marine profiles. Background technique [0002] Aluminum alloy ships have many advantages such as convenience, safety and comfort, corrosion resistance, and impact resistance. , It is of great significance to ensure the safety of strategic transportation and promote the sustained growth of the national economy. However, for the lightweight of aluminum alloys used in ships, strength, corrosion resistance, weldability and other properties are indispensable. Currently, 5083 alloys or 6082 alloys are mainly used in the industry. Since 6082 is a heat-treatable alloy, the strength of the welding zone of this alloy will be severely attenuated after welding (the weld is only about 60% of the base metal), and the corrosion resistance of 6XXX alloys is lower than that of 5X...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C1/02C22F1/047
CPCC22C1/026C22C21/08C22F1/047
Inventor 吴博李洪涛冯佳美朱鸣峰
Owner 中铝特种铝材(重庆)有限公司
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