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Aluminum alloy section for traffic transportation tool and squeezing method thereof

A technology for transportation tools and aluminum alloy profiles, applied in the field of aluminum alloy profiles for transportation tools and their extrusion, can solve the problems of stress corrosion, fracture toughness and stress corrosion resistance, and achieve fracture toughness and stress corrosion resistance. The effect of improved performance, high strength and high comprehensive performance

Active Publication Date: 2018-01-05
GUANGDONG XINGFA ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the content of Mg and Si main alloying elements in 6xxx series aluminum alloys or adding other alloy strengthening elements can improve the strength of 6xxx series aluminum alloys, but it will lead to a decrease in fracture toughness and stress corrosion resistance because of high alloying As a result, there is a large restrictive relationship between strength and toughness, and the high-density precipitation strengthening phase gathers at the grain boundary, which is easy to cause stress corrosion, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The composition and mass percentage composition of the aluminum alloy profile are: Mg 0.6%, Si 0.3%, Se 0.2%, Tc 0.1%, In0.1%, Fe≤0.15%, the balance is Al and other unavoidable impurities, unavoidable The other impurities are ≤0.05% individually, and the total amount is ≤0.15%. The extrusion method of the aluminum alloy profile includes the following steps:

[0044] The first step: select aluminum ingots with purity ≥99.8%, magnesium ingots with purity ≥99.9%, crystalline silicon with purity ≥99.95%, Al10Se alloy, Al10Tc alloy, and Al10In alloy as raw materials;

[0045] The second step: heat and melt the aluminum ingot at 760°C, and then add 0.6% of the total weight of the raw materials, 0.3% of crystalline silicon, 2% of Al10Se alloy, 1% of Al10Tc alloy and 1% of Al10In alloy, Stir and melt into aluminum alloy liquid;

[0046] The third step: spray refining the aluminum alloy liquid in the furnace with hexachloroethane refining agent for 10 minutes, and then stand for 50 m...

Embodiment 2

[0053] The composition and mass percentage composition of the aluminum alloy profile are: Mg 0.8%, Si 0.4%, Se 0.2%, Tc 0.1%, In0.3%, Fe≤0.15%, and the balance is Al and other unavoidable impurities. The other impurities are ≤0.05% individually, and the total amount is ≤0.15%. The extrusion method of the aluminum alloy profile includes the following steps:

[0054] The first step: select aluminum ingots with purity ≥99.8%, magnesium ingots with purity ≥99.9%, crystalline silicon with purity ≥99.95%, Al10Se alloy, Al10Tc alloy, and Al10In alloy as raw materials;

[0055] Step 2: Heat and melt the aluminum ingot at 770°C, then add 0.8% magnesium ingot, 0.4% crystalline silicon, 2% Al10Se alloy, 1% Al10Tc alloy and 3% Al10In alloy to the total weight of raw materials. Stir and melt into aluminum alloy liquid;

[0056] The third step: spray refining the aluminum alloy liquid in the furnace with hexachloroethane refining agent for 20 minutes, and then stand for 50 minutes after removing...

Embodiment 3

[0063] The composition and mass percentage composition of the aluminum alloy profile are: Mg 0.9%, Si 0.5%, Se 0.3%, Tc 0.1%, In0.1%, Fe≤0.15%, the balance is Al and other unavoidable impurities, unavoidable The other impurities are ≤0.05% individually, and the total amount is ≤0.15%. The extrusion method of the aluminum alloy profile includes the following steps:

[0064] The first step: select aluminum ingots with purity ≥99.8%, magnesium ingots with purity ≥99.9%, crystalline silicon with purity ≥99.95%, Al10Se alloy, Al10Tc alloy, and Al10In alloy as raw materials;

[0065] The second step: heating and melting the aluminum ingot at 765°C, and then adding 0.9% of the total weight of the raw material magnesium ingot, 0.5% of crystalline silicon, 3% of Al10Se alloy, 1% of Al10Tc alloy and 1% of Al10In alloy, Stir and melt into aluminum alloy liquid;

[0066] The third step: spray refining the aluminum alloy liquid in the furnace with hexachloroethane refining agent for 15 minutes,...

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Abstract

An aluminum alloy profile for transportation and its extrusion method, the aluminum alloy profile is composed of the following components and mass percentages: Mg 0.6-0.9%, Si 0.3-0.5%, Se 0.1-0.3%, Tc 0.1-0.3 %, In 0.1~0.3%, Fe≤0.15%, the balance is Al and other unavoidable impurities, unavoidable other impurity single ≤0.05%, total ≤0.15%. The present invention suppresses recrystallization and grain growth by designing a specific alloy composition and its extrusion process, so that the aluminum alloy profile can obtain a single fibrous grain structure along the extrusion direction, and the aluminum alloy profile has high strength, Fracture toughness and stress corrosion resistance can be widely used in the fields of automobiles, rail transit, ships, aircraft and other transportation tools.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloy profile production, and specifically relates to an aluminum alloy profile for transportation tools and an extrusion method thereof. Background technique [0002] With the development of lightweight vehicles, rail transit, ships, airplanes and other transportation tools, the application of aluminum alloys in transportation tools is expanding. Most of the aluminum alloys used in transportation vehicles are large-size, hollow, and thin-walled aluminum alloy profiles. In order to improve the carrying capacity, impact resistance, service safety and service life of transportation vehicles, the overall performance of the aluminum alloy profiles is also required. High, such as higher strength, fracture toughness and corrosion resistance. [0003] Existing 6xxx series aluminum alloys of 6101, 6005, 6063 and other grades, although they have good extrusion processing performance and welding performance, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047B22D11/119
Inventor 罗铭强王顺成
Owner GUANGDONG XINGFA ALUMINUM
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