High-strength and high-plasticity heterogeneous layered 5083 aluminum alloy and preparation method thereof

A high plasticity, aluminum alloy technology, applied in the field of aluminum alloy preparation, can solve the problems of 5083 aluminum alloy not reaching a good balance between strength and plasticity, poor alloy plasticity and toughness, and uniform elongation of only 1.5%. The method is simple, the equipment cost is low, and the effect is easy to control

Inactive Publication Date: 2020-09-18
国能锅炉压力容器检验有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the performance of 5083 aluminum alloy with micron grain size, the nanocrystals prepared by this method can significantly improve the strength of Al-Mg alloy, and its yield strength and tensile strength can reach 690MPa and 740MPa, respectively, but the alloy Poor plastic toughness, uniform elongation is only 1.5%
[0006] Based on the above existing research results, it can be seen that the strength and plasticity of the 5083 aluminum alloy with known structures have not yet reached a good balance

Method used

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  • High-strength and high-plasticity heterogeneous layered 5083 aluminum alloy and preparation method thereof
  • High-strength and high-plasticity heterogeneous layered 5083 aluminum alloy and preparation method thereof
  • High-strength and high-plasticity heterogeneous layered 5083 aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a common commercial 5083 aluminum alloy plate with a thickness of 10 mm is placed in a heating furnace, annealed at 500 ° C, and kept for 2 hours to obtain a uniform coarse-grained structure; after the 5083 aluminum alloy plate with a coarse-grained structure is released from the furnace After multiple passes of cold rolling, the thickness of each pass is reduced by 5%, and the thickness of the final aluminum alloy sheet is reduced by 80%. The thickness of the aluminum alloy sheet after final rolling is 2mm; the aluminum alloy sheet cooled to room temperature is placed Carry out recrystallization annealing treatment in the furnace, the annealing temperature is 230 ℃, keep warm for 10 minutes, obtain high strength and high plasticity heterogeneous layered 5083 aluminum alloy; through uniaxial tensile test, obtain the uniaxial The mechanical properties such as yield strength, tensile strength and elongation of the heterogeneous layered 5083 alum...

Embodiment 2

[0042] The annealing temperature and annealing time of the recrystallization annealing treatment are shown in Table 2, and the rest of the steps are the same as in Example 1, and the uniaxial tensile test is carried out on the sample after the heat treatment. Stretch curve as Figure 4 shown. The properties of the materials are shown in Table 2.

[0043] Table 2 Effect of different annealing temperatures on material properties

[0044]

Embodiment 3

[0046] The annealing temperature and annealing time of the recrystallization annealing treatment are shown in Table 2, and the rest of the steps are the same as in Example 1, and the uniaxial tensile test is carried out on the sample after the heat treatment. Stretch curve as Figure 4 shown. The properties of the materials are shown in Table 2.

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Abstract

The invention discloses a high-strength and high-plasticity heterogeneous layered 5083 aluminum alloy and a preparation method thereof. The preparation method comprises the steps that a 5083 aluminumalloy plate is placed into a heating furnace and subjected to annealing heat treatment at 500 DEG C, the temperature is kept for 2 h, and a 5083 aluminum alloy plate with a uniform coarse-grain structure is obtained; the 5083 aluminum alloy plate with the uniform coarse-grain structure is subjected to multi-pass cold rolling at room temperature after being discharged from a furnace, the thicknessof the 5083 aluminum alloy plate is reduced by 5% in each pass, and the thickness of the 5083 aluminum alloy plate is totally reduced by 80% finally; and the rolled 5083 aluminum alloy plate is placedinto the furnace for recrystallization annealing treatment, and the heterogeneous layered 5083 aluminum alloy is obtained. According to the preparation method, a rolling method commonly used in industry is adopted, the equipment cost is low, and the rolling reduction of each pass is easy to control; and at the same time, the heat treatment method is simple, the temperature and time of heat treatment are easy to control, and the prepared 5083 aluminum alloy simultaneously has high strength and high plasticity.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy preparation, in particular to a high-strength and high-plastic heterogeneous layered 5083 aluminum alloy and a preparation method thereof. Background technique [0002] Generally speaking, the high strength of metal structural materials has low plasticity and toughness, and vice versa. Heterostructured materials (Heterostructured materials) are new types of metal materials developed in recent years, which contain different flow stress regions, and have high strength and high plasticity at the same time. This property originates from the hetero-deformation induced (HDI) strengthening and hardening mechanism in heterogeneous metals, also known as back stress hardening and hardening in the past. According to the theory of strain gradient plasticity, to accommodate plastic strain gradients, a superposition of geometrically necessary dislocations is required. These geometrically necessary disl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047
CPCC22F1/047
Inventor 范力文郎惠珍矫延林李烨陈骞王强
Owner 国能锅炉压力容器检验有限公司
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