A kind of high-strength weldable aluminum alloy and preparation method thereof

An aluminum alloy, aluminum-silicon intermediate alloy technology, applied in the field of aluminum alloy materials, can solve the problems of low alloy strength and hardness, not belonging to high-strength aluminum alloy, insufficient strength, etc.

Active Publication Date: 2021-04-06
福建祥鑫股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the expansion of its application range, the strength, toughness, weldability and corrosion resistance of 6xxx series aluminum alloys have been severely challenged.
[0003] The 6xxx series is an Al-Mg-Si alloy, which is an aluminum alloy that can be precipitated and strengthened, and the main strengthening phase is Mg 2 Si, however, the content of alloying elements in 6xxx series aluminum alloys is low at present, such as the content of Mg is 0.3%-1.2%; the content of Si is 0.3%-1.7%, therefore, the alloy strength and hardness are low
Although the aluminum alloy of this invention has good welding performance and certain strength, its strength is not enough in some special fields, and it does not belong to high-strength aluminum alloy, so a high-strength weldable aluminum alloy is needed

Method used

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  • A kind of high-strength weldable aluminum alloy and preparation method thereof

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preparation example Construction

[0024] A method for preparing a high-strength weldable aluminum alloy, comprising the following steps: (a) Melting an intermediate alloy: using pure zinc ingots, pure aluminum ingots and pure magnesium ingots for Zn, Al, and Mg, and using aluminum-silicon ingots for Si, Fe, Mn, Cu, and Cr Master alloys, aluminum-iron master alloys, aluminum-manganese master alloys, aluminum-copper master alloys and aluminum-chromium master alloys; put the pure aluminum ingots into the furnace, set the furnace gas temperature to 760°C, and keep the pure aluminum ingots for 30 minutes after melting for slag removal , and then add aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-iron master alloy and pure magnesium ingots into the melting furnace in order according to the block weight and size from large to small, and then raise the temperature of the furnace gas by 15°C and keep it warm until the master alloy and After the magnesium ingots are completely melted, raise the t...

Embodiment 1

[0030] A high-strength weldable aluminum alloy comprising the following components: 0.8% Mg, 1.05% Si, 0.45% Mn, 0.125% Cu, 0.3% Zn, 0.5% Fe, 0.1% Cr, 0.2% Other alloying elements, the balance is Al. The rare earth elements include: 70% Ce, 20% La, 10% Er. Said other alloy elements include the combination of Ni, V, Ti, Zr and rare earth elements, and the ratio is 1.3:0.7:2.5:0.5:0.2.

Embodiment 2

[0032]A high-strength weldable aluminum alloy comprising the following components: 0.4% Mg, 1.4% Si, 0.2% Mn, 0.2% Cu, 0.1% Zn, 0.6% Fe, 0.05% Cr, 0.3% For other alloying elements, the balance is Al; other alloying elements include Ni, V, Ti, Zr, and combinations of rare earth elements in a ratio of 1.2:0.8:2.4:0.6:0.2. The rare earth elements include: 70% Ce, 20% La, 10% Er.

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Abstract

The invention belongs to the field of aluminum alloy materials and discloses a high-strength weldable aluminum alloy. The high-strength weldable aluminum alloy includes the following components: 0.4-1.2% Mg, 0.7-1.4% Si, 0.2-0.7% Mn, 0.05-0.2% %Cu, 0.1‑0.5% Zn, 0.4‑0.6% Fe, 0.05‑0.15% Cr, 0.1‑0.3% other alloying elements, the balance is Al; other alloying elements include Ni, V, Ti, Zr, rare earth elements Combination, the ratio is 1.2-1.4: 0.6-0.8: 2.4-2.6: 0.4-0.6: 0.2; the rare earth elements include: Ce, La, Er, wherein Ce accounts for more than 60% of the total amount of rare earth elements. The aluminum alloy of the present invention improves the strength and mechanical properties through the improvement of the original formula, and can be used as aluminum alloy parts in the power battery of new energy vehicles, such as end plates, trays and the like.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and in particular relates to a high-strength weldable aluminum alloy and a preparation method thereof. Background technique [0002] The 6xxx series aluminum alloys are the most widely used and the largest output aluminum alloys. The existing 6xxx series aluminum alloys have been used in important industries such as aerospace, weaponry, transportation, and electric power. However, with the expansion of its application range, the strength, toughness, weldability and corrosion resistance of 6xxx series aluminum alloys have been severely challenged. [0003] The 6xxx series is an Al-Mg-Si alloy, which is an aluminum alloy that can be precipitated and strengthened, and the main strengthening phase is Mg 2 Si, however, currently the content of alloying elements in 6xxx series aluminum alloys is low, for example, the content of Mg is 0.3%-1.2%; the content of Si is 0.3%-1.7%, therefore, the str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22F1/043C22F1/047
CPCC22C1/026C22C1/03C22C21/02C22C21/08C22F1/043C22F1/047
Inventor 冯永平黄帧荣张建雷池海涛李桂芝
Owner 福建祥鑫股份有限公司
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