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High volume edge and high baking hardening performance aluminum alloy sheet material and preparation method thereof

A technology of baking and hardening of aluminum alloy sheets, which is applied in the field of aluminum alloys, can solve the problems that mechanical properties and hemming properties cannot be taken into account at the same time, and achieve excellent surface quality and mechanical properties, high hemming and high hemming properties Effect

Pending Publication Date: 2018-04-06
CHINALCO MATERIALS APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the existing 6XXX series plates cannot take into account the mechanical properties and curling properties at the same time, and propose an aluminum alloy plate with high curling and high bake hardening properties and its preparation method

Method used

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  • High volume edge and high baking hardening performance aluminum alloy sheet material and preparation method thereof
  • High volume edge and high baking hardening performance aluminum alloy sheet material and preparation method thereof
  • High volume edge and high baking hardening performance aluminum alloy sheet material and preparation method thereof

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preparation example Construction

[0056] The steps of the aluminum alloy plate with high curling and high bake-hardenability for automobile body provided by the present invention and its preparation method are as follows:

[0057] Ingot:

[0058] Melt the following ratio (Si: 0.4~0.8, Mg: 0.4~1, Fe≤0.3, Cu≤0.2, Mn≤0.2, the balance is Al and normal impurities, and the total amount of impurities is less than 0.15wt.%, each Pure aluminum and various intermediate alloys with impurity element content less than 0.05wt.%, the melt is refined and cast into ingots by semi-continuous casting equipment.

[0059] The used semi-continuous casting equipment of the present invention can adopt Figure 5 The semi-continuous casting equipment shown or other existing casting equipment in the field. Such as Figure 5 As shown, the semi-continuous casting equipment includes a variable-frequency ultrasonic system and a semi-continuous casting system. The variable-frequency ultrasonic system includes a variable-frequency ultrason...

Embodiment 2

[0086] Embodiment 2, 5 and comparative example 1, 5 develop plate curling sample surface photo as figure 2 Shown; Embodiment 2 and comparative example 4 and 6 develop plate texture component volume fraction histogram as image 3 Shown; Embodiment 2 and comparative example 2 develop plate surface paint brush line photo as Figure 4 shown;

[0087] In the case of the same alloy composition and different preparation process parameters:

[0088] A. In Comparative Example 1, due to the low cold rolling rate after intermediate annealing, the grains of the trial-produced plate were coarse, the surface of the plate was rough after hemming, and the hemming performance did not meet the requirements;

[0089] B. In Comparative Example 2, due to the high cold-rolling rate after intermediate annealing, the paint brush line on the surface of the trial-produced plate is obvious, which does not meet the requirements;

[0090] C. In comparative example 3, due to the high intermediate annea...

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Abstract

The invention provides a high volume edge and high baking hardening performance aluminum alloy sheet material and a preparation method thereof. The alloy comprises, by mass, 0.4-0.8% of Si, 0.4-1% ofMg, no more than 0.3% of Fe, no more than 0.2% of Cu, no more than 0.2% of Mn, the balance Al, and less than 0.05wt% of other impurities. The high volume edge and high baking hardening performance aluminum alloy is good in the mechanical performance, and meanwhile, the high volume edge and high baking hardening performance aluminum alloy has a high volume edge performance and a high bake hardeningperformance, and is suitable for auto-body covering, especially for an auto-body covering piece shell plate.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to an aluminum alloy plate with high curling and high baking hardening performance for an automobile body outer plate 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 requiring good surface qualit...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/02C22C1/03C22F1/047C22F1/043C22F1/05
CPCC22C1/026C22C1/03C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 赵丕植吴新星刘贞山赵经纬李超范荣辉
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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