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Production technique of high-damage-resistance aluminum alloy plate

A technology of aluminum alloy sheet material and production process, which is applied in the field of aluminum alloy materials, can solve problems such as reduction, durability of aluminum alloy materials, and failure to improve damage tolerance simultaneously, so as to improve internal quality, reduce solidification eutectic phase and excessive heat treatment Phase, the effect of ensuring strength and toughness

Inactive Publication Date: 2014-01-01
ANHUI SHENGDA QIANLIANG ALUMINUM
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Problems solved by technology

With the rapid development of science and technology and industrial economy in recent years, further improving the performance of aluminum alloy materials has become a common concern of the international aluminum industry today. However, while improving the strength and toughness of aluminum alloy materials, the durability and Damage tolerance cannot be improved synchronously, or even decreased

Method used

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Embodiment Construction

[0018] A production process of a high damage-resistant aluminum alloy plate, comprising the following steps:

[0019] (1) Meet the following requirements according to the mass percentage of elements: Cu 3.2-3.6, Mg 1.1-1.4, Mn 0.6-0.9, Zr 0.4-0.8, Mo 0.3-0.6, Li 0.15-0.25, Ga 0.1-0.2, Co 0.05-0.15 , Fe 0.04-0.07, Si 0.03-0.05, Er 0.06-0.12, Sc 0.04-0.08, and the balance is Al for batching, put the charge into the melting furnace for melting at 740-76050°C, and wait until the metal is completely melted and stirred evenly , take a sample at the middle of the molten aluminum depth and on both sides of the furnace for analysis, and convert the furnace after the analysis is qualified;

[0020] (2) After the melt is transferred to the static furnace, the refining agent powder is sprayed into 2 / 3 of the depth of the molten aluminum with nitrogen as a carrier for refining. The nitrogen pressure is 1.4kg / mm, the refining temperature is 720°C, and the refining time is 25min, stand ...

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Abstract

The invention discloses a production technique of a high-damage-resistance aluminum alloy plate. The aluminum alloy comprises the following elements in percentage by mass: 3.2-3.6% of Cu, 1.1-1.4% of Mg, 0.6-0.9% of Mn, 0.4-0.8% of Zr, 0.3-0.6% of Mo, 0.15-0.25% of Li, 0.1-0.2% of Ga, 0.05-0.15% of Co, 0.04-0.07% of Fe, 0.03-0.05% of Si, 0.06-0.12% of Er, 0.04-0.08% of Sc and the balance of Al. On the basis of lowering the Fe / Si ratio and Cu content, Zr, Er, Sc, Li and other elements are added for microalloying to reduce the solidified eutectic phase and heat treatment excess phase and reduce the fatigue crack generation probability; the microalloying forms a disperse phase coherent with the base to keep the deformation recovery subgrain structure; and the thermomechanical treatment improves the distribution uniformity of the precipitated phase to effectively enhance the fatigue crack propagation resistance, thereby greatly enhancing the damage resistance of the existing aluminum alloy material on the premise of ensuring the strength and toughness of the aluminum alloy material.

Description

technical field [0001] The invention relates to a production process of a high-damage-resistant aluminum alloy plate and strip, and belongs to the technical field of aluminum alloy materials. Background technique [0002] Due to its low density, high specific strength and specific stiffness, good elasticity, good impact resistance, corrosion resistance, wear resistance, easy surface coloring, good processing formability and high recycling and regeneration, aluminum alloys are widely used in aviation. , aerospace, automobile, machinery manufacturing, shipbuilding, construction, decoration and other fields. With the rapid development of science and technology and industrial economy in recent years, further improving the performance of aluminum alloy materials has become a common concern of the international aluminum industry today. However, while improving the strength and toughness of aluminum alloy materials, the durability and Damage tolerance cannot be improved simultaneo...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22C1/06C22C1/02C22F1/057
Inventor 徐兴洪
Owner ANHUI SHENGDA QIANLIANG ALUMINUM
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