7150 aluminum alloy slab ingot melting and casting process

An aluminum alloy and flat ingot technology, which is applied in the field of aluminum alloy melting and casting, can solve problems such as the inability to meet the needs of high-performance aluminum alloys, and achieve the effects of increasing the yield of a product, reducing the content of non-metallic slag, and reducing the segregation of alloy components

Inactive Publication Date: 2017-05-10
GUANGXI UNIV
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Problems solved by technology

At present, domestic aluminum processing enterprises are still in their infancy in the production of high-end aviation aluminum alloys including 7150. They can only produce large-scale, high-perf

Method used

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with the examples.

[0013] A 7150 aluminum alloy flat ingot melting and casting process consists of the following steps:

[0014] (1) Ingredients: Dosing according to the following mass fractions: Si: <0.12%, Fe: <0.15%, Cu: 1.9-2.5%, Mn: <0.1%, Mg: 2.0-2.7%, Zn: 5.9-6.9% %, Ti≤0.06%, and the balance is Al.

[0015] (2) Melting: During the melting process, the melting temperature is strictly controlled at 735°C. After the molten aluminum is completely melted, start the electromagnetic stirrer to stir for 30 minutes to ensure the composition and temperature uniformity of the alloy melt; when the temperature of the molten aluminum rises above 730°C, perform manual stirring, and after stirring evenly, use carbon tetrachloride to treat the melt. Pre-refining reduces slag content, hydrogen content and alkali metal content in the melt.

[0016] (3) Sampling analysis and converter: After the pre...

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Abstract

The invention relates to a 7150 aluminum alloy slab ingot melting and casting process. According to the 7150 aluminum alloy slab ingot melting and casting process, by controlling melting temperature, electromagnetic stirring and melt refining, the slag content, the hydrogen content and the alkali metal content in a melt are lowered effectively, and uniformity of alloy components is ensured. The casting speed and water flow during casting are controlled by a low-liquid-level aluminum alloy slab ingot casting machine, casting cracks and feather crystals are avoided, the product yield is improved greatly, and the product production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy melting and casting, and in particular relates to a melting and casting process of 7150 aluminum alloy flat ingot. Background technique [0002] 7150 alloy is one of the most widely used Al-Zn-Mg-Cu aluminum alloys in the aviation industry. In addition to high strength, the alloy also has high fracture toughness, good corrosion resistance, and excellent fatigue resistance. At present, domestic aluminum processing enterprises are still in their infancy in the production of high-end aviation aluminum alloys including 7150. They can only produce large-scale, high-performance aviation aluminum alloys in small batches, which cannot meet the high requirements of China's aviation industry, especially large aircraft projects. The demand for performance aluminum alloys. Due to the immaturity of the current process, it is necessary to study and improve the production process of 7150 aluminum alloy ...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22C1/06C22F1/053B22D7/00
CPCB22D7/005C22C1/026C22C1/06C22C21/10C22F1/053
Inventor 龚静
Owner GUANGXI UNIV
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