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A kind of 6xxx series aluminum alloy plate with high flanging performance and preparation method thereof

An aluminum alloy sheet and flanging technology, which is applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the problems of unalloyed internal microstructure evolution process control, incomplete intermediate annealing system, and high process cost, and achieves satisfactory results. Industrial production needs, excellent flanging performance, and the effect of improving flanging performance

Active Publication Date: 2021-04-06
CHINALCO MATERIALS APPL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN 105543741 Chinese patent No. A proposes a method for improving flanging performance by an intermediate annealing process, but it chooses to carry out intermediate annealing with an annealing line, which is costly and is not conducive to factory scheduling
[0006] CN 105441740 Chinese patent No. A proposes a production method of 6xxx series aluminum alloy plates with high flanging performance, the intermediate annealing system disclosed in it is not perfect enough, and the evolution process of the alloy internal structure is not controlled

Method used

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  • A kind of 6xxx series aluminum alloy plate with high flanging performance and preparation method thereof
  • A kind of 6xxx series aluminum alloy plate with high flanging performance and preparation method thereof
  • A kind of 6xxx series aluminum alloy plate with high flanging performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2

[0038] Embodiment 1~2, comparative example 1~2: according to 1 in table 1 # Table 2 shows the preparation process of the aluminum alloy composition preparation examples 1-2 and comparative examples 1-2, and the statistical results of the second phase distribution and grain size of the longitudinal section of the final finished plate are shown in table 3. The flanging performance of the finished board obtained in Examples 1-2 is qualified. The flanging performance of the finished boards obtained in Comparative Examples 1-2 was unqualified. In comparative example 1, the intermediate annealing temperature is too low, too many second phases are precipitated, there are too many fine phases, and the proportion of large-sized second phases is too low, resulting in too large grain size of the final finished plate; in comparative example 2, the intermediate annealing During the cooling process, the cooling rate is too low, so that a large amount of second phases precipitate during the...

Embodiment 5

[0040] Embodiment 5, comparative example 5: press 3 in table 1 # The preparation process of the aluminum alloy composition of Example 5 and Comparative Example 5 is shown in Table 2, and the statistical results of the second phase distribution and grain size of the longitudinal section of the final finished plate are shown in Table 3. The flanging performance of the finished board obtained in Example 5 is qualified. In comparative example 5, the solid solution temperature is too low, and the second phase is insufficiently remelted, so that the proportion of the large-sized second phase in the final finished board is too high, the number of crack sources increases during the flanging process, and the flanging performance is unqualified.

[0041] Table 1 Composition of aluminum alloy sheet

[0042]

[0043] Table 2 Intermediate annealing system of aluminum sheet

[0044]

[0045] Table 3 Second phase distribution and flanging properties on the surface of aluminum sheet ...

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Abstract

The present invention provides a 6xxx series aluminum alloy sheet with high flanging performance. The aluminum alloy sheet includes the following components in terms of mass percentage: Mg: 0.1% to 1.4%; Cu: ≤ 0.35%; Mn: ≤ 0.3 %; Cr: ≤ 0.3%; Si: 0.3% to 1.8%; Fe: ≤ 0.45%, and the balance of Al, the average grain size of the finished aluminum alloy sheet along the rolling direction is less than 30 μm, and the diameter is greater than or equal to 2 μm The proportion of the number of equivalent circles of the second phase is less than 10%. The technical solution provided by the present invention effectively regulates the distribution of the second phase and the grain size in the aluminum alloy, greatly improves the flanging performance of the plate, and the obtained plate can be widely used in automobiles. 6xxx Aluminium Alloy Covers Outer Panels.

Description

technical field [0001] The invention relates to an aluminum alloy and a preparation method thereof, in particular to a 6xxx series aluminum alloy plate with high flanging performance and a preparation method thereof. Background technique [0002] With the development of the automobile industry, people put forward higher requirements for the safety and lightweight of automobiles. The lightweight of the car refers to reducing the overall quality of the car as much as possible on the premise of ensuring the strength and safety performance of the car, so as to improve the power of the car, reduce fuel consumption, and reduce exhaust pollution. Aluminum alloy has become the most ideal material for automobile lightweight due to its high strength and rigidity, good impact resistance, excellent formability and high recycling rate. [0003] 6XXX series aluminum alloys are commonly used as outer panels of automobile bodies. In addition to having good surface quality, excellent mechan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22C21/02C22F1/043C22F1/047C21D9/00B21B37/16
Inventor 赵经纬刘贞山赵丕植曹以恒曹海龙
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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