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Preparation method of high-strength and corrosion-resistant aluminum alloy

A kind of aluminum alloy, corrosion-resistant technology, applied in the field of aluminum alloy, can solve the problems of high tensile and yield performance requirements of aluminum alloy

Active Publication Date: 2021-05-18
安徽鑫铂铝业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used in seawater and marine complex environments, the requirements for the tensile and yield properties of aluminum alloys are relatively high, which needs to be solved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a high-strength corrosion-resistant aluminum alloy, comprising the steps of:

[0023] S1. Melt the raw materials to obtain a premelt. The composition of the premelt includes: Mn 0.4225%, Cr 0.28%, Ti 0.01%, Si 1.6%, Cu 0.12%, Mg 0.25%, La 0.01%, V 0.008%, the balance is aluminum;

[0024] S2. Add refining agent to the premelt material, the mass ratio of refining agent to aluminum content in the premelt material is 0.1:1000, fill in nitrogen, and adjust the nitrogen flow rate to 1.85m 3 / h, refining at 800°C for 15 minutes, degassing with a degasser, transferring to a static furnace for 1 hour, and continuing refining for 6 minutes to obtain a refined material;

[0025] The components of the refining agent include by mass percentage: 25% sodium chloride, 5% calcium fluoride, 2% cryolite, 1-2% magnesium nitride, 1-2% hexachloroethane, 0.1-0.15% rare earth, Surplus is potassium chloride;

[0026] S3. Filter the refined material through a filter bo...

Embodiment 2

[0030] A method for preparing a high-strength corrosion-resistant aluminum alloy, comprising the steps of:

[0031] S1. Melt the raw materials to obtain a premelt. The composition of the premelt includes: Mn 0.5361%, Cr 0.12%, Ti 0.05%, Si 1.2%, Cu 0.28%, Mg 0.15%, La 0.02%, V 0.001%, the balance is aluminum;

[0032] S2. Add refining agent to the premelt, the mass ratio of the refining agent to the aluminum content in the premelt is 0.5:1000, fill in nitrogen, and adjust the flow rate of nitrogen to 1.0m 3 / h, refining at 850°C for 10 minutes, degassing with a degasser, transferring to a static furnace for 2 hours, and continuing refining for 2 minutes to obtain a refined material;

[0033] The components of the refining agent include by mass percentage: 35% sodium chloride, 1% calcium fluoride, 6% cryolite, 1% magnesium nitride, 2% hexachloroethane, 0.1% rare earth, and the balance is potassium chloride ;

[0034] S3. Filter the refined material through a filter box and c...

Embodiment 3

[0038] A method for preparing a high-strength corrosion-resistant aluminum alloy, comprising the steps of:

[0039] S1. Melt the raw materials to obtain a premelt. The composition of the premelt includes: Mn 0.4461%, Cr 0.24%, Ti 0.02%, Si 1.5%, Cu 0.16%, Mg 0.22%, La 0.013%, V 0.007%, the balance is aluminum;

[0040] S2. Add refining agent to the premelt material, the mass ratio of refining agent to aluminum content in the premelt material is 0.2:1000, fill in nitrogen, and adjust the nitrogen flow rate to 1.60m 3 / h, refined at 820°C for 14 minutes, degassed with a degasser, transferred to a static furnace for 1.3 hours, and continued to refine for 5 minutes to obtain a refined material;

[0041] The components of the refining agent include by mass percentage: 28% sodium chloride, 4% calcium fluoride, 3% cryolite, 1.7% magnesium nitride, 1.2% hexachloroethane, 0.14% rare earth, and the balance is potassium chloride ;

[0042]S3. Cast the refined material through a filter...

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Abstract

The invention discloses a preparation method of a high-strength and corrosion-resistant aluminum alloy. The preparation method comprises the following steps that raw materials are melted to obtain a pre-melted material; a refining agent is added into the pre-melted material, nitrogen is introduced, the nitrogen flow is adjusted to be 1.0-1.85 m<3> / h, refining is conducted for 10-15 min at the temperature of 800-850 DEG C, degassing and standing are conducted for 1-2 h, refining continues to be conducted for 2-6 min, and a refined material is obtained; the refined material is filtered through a filtering box and then cast, an aluminum bar is obtained, the casting temperature ranges from 700 DEG C to 750 DEG C, the casting speed ranges from 40 mm / min to 60 mm / min, the cooling water amount ranges from 80 L / min to 120 L / min, homogenization treatment is carried out for 2 h to 4 h at the temperature of 500 DEG C to 540 DEG C, extrusion is carried out through a 6,000-t extruder, water cooling is carried out to the room temperature, and a prefabricated profile is obtained; and the prefabricated profile is heated to 200-250 DEG C, the temperature is kept for 10-20 hours and then is reduced to the room temperature, and the high-strength and corrosion-resistant aluminum alloy is obtained.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a preparation method of a high-strength corrosion-resistant aluminum alloy. Background technique [0002] Aluminum alloy is a general term for alloys based on aluminum. The main alloying elements are copper, silicon, magnesium, zinc, manganese, and other alloying elements are nickel, iron, titanium, zirconium, scandium, silver, chromium, lithium, etc., with low density, With the advantages of high strength and good plasticity, it is widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. [0003] In recent years, with the rapid transformation and continuous development of the Chinese Air Force and Navy, offshore areas and maritime air supremacy have become more and more important to the country. Therefore, the research and development of new aircraft suitable for offshore areas and marine combat climates is particularly...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02C22C1/06C22F1/043
CPCC22C21/02C22C1/026C22C1/06C22F1/043
Inventor 唐开健陈未荣王超李飞庆李亨
Owner 安徽鑫铂铝业股份有限公司
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