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A kind of preparation method of high-strength 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: 2022-06-28
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 preparation method of high-strength corrosion-resistant aluminum alloy, comprising the following steps:

[0023] S1. Melt the raw material to obtain a pre-melt, and the component content of the pre-melt by mass percentage 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 a refining agent to the pre-melting material, the mass ratio of the refining agent and the aluminum content in the pre-melting material is 0.1:1000, fill with nitrogen, and adjust the nitrogen flow rate to 1.85m 3 / h, refining at 800°C for 15min, degassed by a degasser, transferred to a stationary furnace for 1h, and continued refining for 6min to obtain a refined material;

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

[0026] S3....

Embodiment 2

[0030] A preparation method of high-strength corrosion-resistant aluminum alloy, comprising the following steps:

[0031] S1. Melt the raw material to obtain a pre-melt, the component content of the pre-melt includes: Mn 0.5361%, Cr 0.12%, Ti 0.05%, Si 1.2%, Cu 0.28%, Mg 0.15%, La 0.02% by mass percentage, V 0.001%, the balance is aluminum;

[0032] S2. Add a refining agent to the pre-melting material, the mass ratio of the refining agent and the aluminum content in the pre-melting material is 0.5:1000, fill with nitrogen, and adjust the nitrogen flow to 1.0m 3 / h, refining at 850°C for 10min, degassed by a degasser, transferred to a stationary furnace for 2h, and continued refining for 2min to obtain a refined material;

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

[0034] S3. The refined material is filtered t...

Embodiment 3

[0038] A preparation method of high-strength corrosion-resistant aluminum alloy, comprising the following steps:

[0039] S1. Melt the raw material to obtain a pre-melt, and the component content of the pre-melt by mass percentage 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 a refining agent to the pre-melting material, the mass ratio of the refining agent and the aluminum content in the pre-melting material is 0.2:1000, fill with nitrogen, and adjust the nitrogen flow rate to 1.60m 3 / h, refining at 820°C for 14 minutes, degassed by a degasser, transferred to a static furnace for 1.3 hours, and continued refining for 5 minutes to obtain a refined material;

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

[0042]S3. The re...

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Abstract

The invention discloses a preparation method of a high-strength corrosion-resistant aluminum alloy, which comprises the following steps: melting raw materials to obtain a premelt; adding a refining agent to the premelt, filling in nitrogen, and adjusting the nitrogen flow rate to 1.0-1.85m 3 / h, refining at 800-850°C for 10-15min, degassing, standing for 1-2h, and continuing refining for 2-6min to obtain the refined material; the refined material is filtered through the filter box and cast to obtain aluminum rods, wherein the casting temperature is 700- 750°C, casting speed 40‑60mm / min, cooling water volume 80‑120L / min, 500‑540°C homogenization treatment for 2‑4h, extruded by a 6000t extruder, water cooled to room temperature, to obtain prefabricated profiles; The profile is heated to 200-250°C, kept for 10-20h, and then lowered to room temperature to obtain a high-strength, corrosion-resistant aluminum alloy.

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 with aluminum as the matrix. The main alloying elements are copper, silicon, magnesium, zinc, and manganese. Other alloying elements are nickel, iron, titanium, zirconium, scandium, silver, chromium, lithium, etc. With the advantages of high strength and good plasticity, it is widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. [0003] In recent years, with the rapid transformation and continuous development of the Chinese Air Force and Navy, the offshore area and maritime air supremacy have become more and more important to the country. Therefore, the research and development task of new aircraft adapted to the offshore area and maritime combat climate is particula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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