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High-strength corrosion-resistant 5383 aluminum alloy and preparation process of marine sectional material

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 corrosion resistance of materials is reduced, so as to achieve inhibition Recovery and recrystallization, taking into account mechanical properties, and improving the overall performance

Active Publication Date: 2020-08-18
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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  • High-strength corrosion-resistant 5383 aluminum alloy and preparation process of marine sectional material
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  • High-strength corrosion-resistant 5383 aluminum alloy and preparation process of marine sectional material

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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 corrosion-resistant 5383 aluminum alloy and a preparation process of a marine sectional material. The 5383 aluminum alloy has the advantages of high structuralstrength, good corrosion resistance and good machinable formability, and the mechanical property, the corrosion resistance and the production cost are taken into consideration; moreover, the preparation process is simple, the produced sectional material is controllable in size and low in reject ratio, the sectional material has higher dimensional precision, the yield strength can reach 220 MPa orabove and is improved by 10% or above compared with an existing 5383 aluminum alloy sectional material, the strength of the sectional material is greatly improved, meanwhile, the production efficiencyis high, the material is high in corrosion resistance, and therefore the marine high-strength aluminum alloy extruded sectional material with high strength and corrosion resistance 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 Applications(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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