Aluminum alloy medium plate preparation method

An aluminum alloy substrate and aluminum alloy technology, which is applied in the field of non-ferrous metal processing, can solve the problems of uneven structure and performance in the high direction of the plate, larger surface deformation than the core, and low mechanical properties of the alloy, so as to achieve good product quality and microstructure. Uniform, high-performance results

Active Publication Date: 2013-09-25
广西南南铝加工有限公司
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AI Technical Summary

Problems solved by technology

[0004] The aluminum alloy plate produced by the hot rolling method has the following disadvantages: (1) the surface deformation of the rolled plate is larger than that of the center, and the high-level structure and properties of the plate are uneven; (2) the plate has a texture after rolling, resulting in Anisotropy; (3) The flatness and thickness of the rolled plate are only controlled by rolls, and the accuracy is difficult to grasp; (4) The internal stress formed during the rolling process or quenching process causes dimensional instability during machining or during use; (5) The hot rolling method has many processes, long production cycle and high cost
This method is aimed at a non-heat treatment strengthened 5xxx series alloy with low mechanical properties

Method used

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  • Aluminum alloy medium plate preparation method

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Experimental program
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Effect test

Embodiment 1

[0030] Put 50 tons of raw materials into the melting furnace: the melting temperature is 740°C to 750°C. After the alloy is completely melted, the composition and content (% by weight) of the aluminum alloy are controlled as follows: Si 0.05, Mg 2.36, Cu 1.54, Cr 0.21, Ti 0.03; Mn 0.03, Fe 0.08, Zn 5.52, V 0.02, Zr 0.01, and the rest The amount is Al. A multi-stage degassing purification system is used to degas the melt, and then a 30ppi foam ceramic filter plate is used to filter the melt, and an aluminum alloy ingot with a thickness of 420mm is obtained after casting. The aluminum alloy ingot is subjected to stress relief treatment at 450°C for 12 hours, then the head and tail of the stress relieved aluminum alloy ingot are cut off, sawed into 121mm thick aluminum alloy plate, and then the aluminum alloy plate is subjected to 4 hours at 470°C Solution treatment, and quenching immediately, after quenching the aluminum alloy plate, remove the quenching residual stress, and co...

Embodiment 2

[0033] Put 50 tons of raw materials into the melting furnace: the melting temperature is 700°C to 720°C. After the alloy is completely melted, the composition and content (% by weight) of the aluminum alloy are controlled as follows: Si 0.01, Mg 1.99, Cu 2.14, Cr 0.03, Ti 0.03; Mn 0.01, Fe 0.10, Zn 6.17, V 0.03, Zr 0.09, and the rest The amount is Al. A multi-stage degassing purification system is used to degas the melt, and then a 30ppi foam ceramic filter plate is used to filter the melt, and an aluminum alloy ingot with a thickness of 420mm is obtained after casting. The aluminum alloy ingot is subjected to stress relief treatment at 400°C for 20 hours, then the head and tail of the stress relieved aluminum alloy ingot are cut off, sawed into 121mm thick aluminum alloy plate, and then the aluminum alloy plate is subjected to 4 hours at 470°C Solution treatment, and quenching immediately, after quenching the aluminum alloy plate, remove the quenching residual stress, and co...

Embodiment 3

[0036] Put 50 tons of raw materials into the melting furnace: the melting temperature is 700°C to 710°C. After the alloy is completely melted, the composition and content (% by weight) of the aluminum alloy are controlled as follows: Si 0.08, Mg 1.99, Cu 0.18, Cr 0.33, Ti 0.05; Mn 0.45, Fe 0.17, Zn 4.2, V 0.04, Zr 0.16, the rest The amount is Al. A multi-stage degassing purification system is used to degas the melt, and then a 30ppi foam ceramic filter plate is used to filter the melt, and an aluminum alloy ingot with a thickness of 520mm is obtained after casting. The aluminum alloy ingot is subjected to stress relief treatment at 470°C for 5 hours, then the head and tail of the stress relieved aluminum alloy ingot are cut off, sawed into 251mm thick aluminum alloy plate, and then the aluminum alloy plate is subjected to 2 hours at 470°C Solution treated and immediately quenched. The plate is subjected to aging treatment at 150°C for 16 hours, and then sliced ​​according to...

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Abstract

The invention discloses an aluminum alloy medium plate preparation method. The aluminum alloy medium plate preparation method comprises the following steps of: smelting at 700-750 DEG C, degassing a melt by adopting a multistage degassing purification system, and filtering the melt by adopting a 300ppi-foamed ceramic filtration plate; casting the melt to obtain an aluminum alloy ingot blank, and carrying out stress-relieving treatment at 300-500 DEG C for more than or equal to 1 hour; controlling the temperature of a saw cutting aluminum alloy sheet at 350-500 DEG C, carrying out solution treatment for more than or equal to 0.5 hour, controlling the tensile deformation at 1%-4%, controlling the temperature of the aluminum alloy sheet at 50-300 DEG C, and carrying out aging treatment for 2-40 hours to obtain an aluminum alloy medium plate. Compared with the aluminum alloy medium plate prepared by a conventional hot-rolling method, the aluminum alloy medium plate prepared by the method has the advantages that the preparation working procedures are reduced, the production cycle is short, the cost is reduced, the plate has good quality and high strength and meets the market requirements, and the good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and relates to a method for preparing aluminum alloy medium and thick plates. Background technique [0002] Aluminum alloy medium and thick plates are widely used in transportation, machinery and electronics, tools and molds and other fields. Compared with steel, the advantages of aluminum alloy are as follows: (1) The density is small. The density of aluminum is only about one-third of that of steel, so aluminum alloy is more suitable for the current lightweight requirements; (2) High thermal conductivity. The thermal conductivity of aluminum alloy is about 4 times that of steel, which can shorten the cooling time during processing; (3) good cutting performance. The cutting speed of aluminum alloy can be up to 5 times that of steel, which can be used for high-speed cutting, which can significantly shorten the manufacturing cycle and reduce the wear of cutting tools, thus si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/053C22F1/047C22F1/057C22C21/00C22C21/06C22C21/08C22C21/10C22C21/18C22B9/05C22B9/02
Inventor 何克准蒋秋妹周文标郑玉林
Owner 广西南南铝加工有限公司
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