Corrosion resistance aluminum alloy plate for aviation and preparation method of corrosion resistance aluminum alloy plate

Abstract

The invention relates to the technical field of aluminum alloy processing, in particular to a preparation method of an aluminum alloy plate for aviation. The aluminum alloy comprises the following chemical components of, in percentage by mass, 0.05%-0.2% of zirconium, 0.05%-0.2% of scandium, 3.0%-6.0% of zinc, 3.0%-6.0% of magnesium, 3.0%-4.0% of copper, 0.2%-0.4% of silver, 0.05%-0.2% of lithium,1.0%-1.5% of manganese, 0.8%-1.5% of silicon, 0.20%-0.40% of titanium, 0.05%-0.1% of ruthenium, and the balance aluminum and inevitable impurities, and the content of the impurities is controlled tobe 0.15% or below; and an aluminum alloy melt is prepared according to pre-prepared materials, ultrasonic vibration is adopted in a refining process to refine grains, and then the aluminum alloy platefor the aviation is obtained through pouring, homogenization, extrusion, solid solution treatment, pre-stretching and three-stage aging treatment. According to the corrosion resistance aluminum alloyplate for the aviation and the preparation method of the corrosion resistance aluminum alloy plate, the Vickers hardness of the prepared aluminum alloy plate ranges from 175 Hv to 190 Hv, the yield strength ranges from 520 MPa to 562 MPa, the tensile strength ranges from 605 MPa to 656 MPa, the elongation ranges from 9.4% to 12%, the overall performance is excellent, and the aluminum alloy plateis particularly suitable for being used in the aerospace field.

Description

technical field

[0001] The invention relates to the technical field of aluminum alloy processing, in particular to a corrosion-resistant aluminum alloy plate for aviation and a preparation method thereof. Background technique

[0002] Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and is one of the light metal materials. In addition to the general characteristics of aluminum, aluminum alloys also have specific characteristics of some alloys due to the different types and quantities of alloying elements added. The density of aluminum alloy is 2.63~2.85g / cm 3 , has high strength, specific strength close to high-alloy steel, specific stiffness exceeding steel, good casting performance and plastic processing performance, good electrical and thermal conductivity, good corrosion resistance and weldability, and is the main material used in aviation. Structural materials. With the continuous development of technology, 7-series...

Examples

Embodiment 1

[0040] This embodiment also provides a method for preparing an aluminum alloy plate for aviation, the specific steps are as follows:

[0041] S1: design the composition of aluminum alloy, the mass percentage of the chemical composition of the aluminum alloy is:

[0042] 0.1% zirconium, 0.1% scandium, 4.0% zinc, 4.0% magnesium, 3.5% copper, 0.3% silver, 0.1% lithium, 1.2% manganese, 0.8% silicon, 0.25% titanium, 0.08% ruthenium, the balance is aluminum and not Impurities to avoid, impurity about 0.05%.

[0043] S2: preparing an aluminum alloy ingot, comprising the steps of:

[0044] S21: According to the composition of the aluminum alloy in step S1, carry out batching, melt under an argon atmosphere, and the melting temperature is 800 ° C. After the pure aluminum raw material is completely melted, add zirconium, copper, and silver in sequence, and stir for 5 minutes after the alloy components are completely melted. .

[0045] S22: Under an argon atmosphere, adjust the meltin...

Embodiment 2-5

[0056] The process parameter conditions of the aluminum alloy plate preparation of embodiment 2-5 are shown in table 1:

[0057] The process parameter condition of aluminum alloy sheet material preparation in the embodiment 2-5 of table 1

[0058]

[0059] Example performance test

[0060] The properties of the aluminum alloy plates prepared in Examples 1-5 were tested, and the results are shown in Table 2.

[0061] The performance test result of the aluminum alloy sheet material that table 2 embodiment 1-5 makes

[0062] Example Vickers hardness (Hv) Yield strength MPa Tensile strength (MPa) Elongation (%) 1 190 562 656 12 2 178 536 610 10 3 185 560 624 10.5 4 184 555 638 11.6 5 175 520 605 9.4

[0063] It can be seen from Table 2 that the performance indicators of the aluminum alloy plates prepared in Examples 1-5 are: Vickers hardness 175-190Hv, yield strength 520-562MPa, tensile strength 605-656MPa, elongati...

technical field

[0001] The invention relates to the technical field of aluminum alloy processing, in particular to a corrosion-resistant aluminum alloy plate for aviation and a preparation method thereof. Background technique

[0002] Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and is one of the light metal materials. In addition to the general characteristics of aluminum, aluminum alloys also have specific characteristics of some alloys due to the different types and quantities of alloying elements added. The density of aluminum alloy is 2.63~2.85g / cm 3 , has high strength, specific strength close to high-alloy steel, specific stiffness exceeding steel, good casting performance and plastic processing performance, good electrical and thermal conductivity, good corrosion resistance and weldability, and is the main material used in aviation. Structural materials. With the continuous development of technology, 7-series...

Examples

Embodiment 1

[0040] This embodiment also provides a method for preparing an aluminum alloy plate for aviation, the specific steps are as follows:

[0041] S1: design the composition of aluminum alloy, the mass percentage of the chemical composition of the aluminum alloy is:

[0042] 0.1% zirconium, 0.1% scandium, 4.0% zinc, 4.0% magnesium, 3.5% copper, 0.3% silver, 0.1% lithium, 1.2% manganese, 0.8% silicon, 0.25% titanium, 0.08% ruthenium, the balance is aluminum and not Impurities to avoid, impurity about 0.05%.

[0043] S2: preparing an aluminum alloy ingot, comprising the steps of:

[0044] S21: According to the composition of the aluminum alloy in step S1, carry out batching, melt under an argon atmosphere, and the melting temperature is 800 ° C. After the pure aluminum raw material is completely melted, add zirconium, copper, and silver in sequence, and stir for 5 minutes after the alloy components are completely melted. .

[0045] S22: Under an argon atmosphere, adjust the meltin...

Embodiment 2-5

[0056] The process parameter conditions of the aluminum alloy plate preparation of embodiment 2-5 are shown in table 1:

[0057] The process parameter condition of aluminum alloy sheet material preparation in the embodiment 2-5 of table 1

[0058]

[0059] Example performance test

[0060] The properties of the aluminum alloy plates prepared in Examples 1-5 were tested, and the results are shown in Table 2.

[0061] The performance test result of the aluminum alloy sheet material that table 2 embodiment 1-5 makes

[0062] Example Vickers hardness (Hv) Yield strength MPa Tensile strength (MPa) Elongation (%) 1 190 562 656 12 2 178 536 610 10 3 185 560 624 10.5 4 184 555 638 11.6 5 175 520 605 9.4

[0063] It can be seen from Table 2 that the performance indicators of the aluminum alloy plates prepared in Examples 1-5 are: Vickers hardness 175-190Hv, yield strength 520-562MPa, tensile strength 605-656MPa, elongati...

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