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High-strength high-toughness anti-corrosion aluminum alloy for rail traffic and extrusion method of high-strength high-toughness anti-corrosion aluminum alloy

A technology of rail transit and extrusion method, which is applied in the field of high-strength, toughness and corrosion-resistant aluminum alloy and its extrusion, which can solve the problems of inability to obtain complete fibrous crystal structure, impact fracture toughness and stress corrosion resistance performance limitations, and achieve excellent anti-corrosion properties. Impact fracture toughness and stress corrosion resistance, the effect of improving impact fracture toughness and stress corrosion resistance, high-strength impact fracture toughness and stress corrosion resistance

Inactive Publication Date: 2018-07-27
佛山市三水凤铝铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a high-strength, toughness, corrosion-resistant aluminum alloy and its extrusion method for rail transit, aiming to solve the problem that the 7005 alloy in the prior art cannot be formed in the extrusion direction. Obtaining a complete fibrous structure, impact fracture toughness and stress corrosion resistance are limited

Method used

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  • High-strength high-toughness anti-corrosion aluminum alloy for rail traffic and extrusion method of high-strength high-toughness anti-corrosion aluminum alloy
  • High-strength high-toughness anti-corrosion aluminum alloy for rail traffic and extrusion method of high-strength high-toughness anti-corrosion aluminum alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The high-strength, toughness and anti-corrosion aluminum alloy for rail transit is composed of the following components in mass percentage: Zn 4.6%, Mg 1.8%, Cu 0.2%, Mn 0.2%, Cr 0.1%, Zr 0.1%, Ti 0.01%, B 0.002%, Fe≤0.15%, Si≤0.1%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%.

[0057] The extrusion method of the aluminum alloy comprises the following steps:

[0058] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Zr alloy, Al-5Ti-1B alloy wire and aluminum ingots with a purity of 99.7%, zinc ingots with a purity of 99.9%, and purity 99.9% magnesium ingots are used as raw materials;

[0059] Step 2: Heat and melt the aluminum ingot at 770°C, then add 4.6% zinc ingot, 1.8% magnesium ingot, 1% Al-20Cu alloy, 1% Al-20Mn alloy, 1% Al-10Cr alloy and 1% Al-10Zr alloy are stirred and melted into aluminum alloy liquid;

[0060] The third step: use...

Embodiment 2

[0068]The high-strength, toughness and anti-corrosion aluminum alloy for rail transit is composed of the following components by mass percentage: Zn 4.8%, Mg 1.6%, Cu 0.15%, Mn 0.25%, Cr 0.125%, Zr 0.125%, Ti 0.015%, B 0.003%, Fe≤0.15%, Si≤0.1%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%.

[0069] The extrusion method of the aluminum alloy comprises the following steps:

[0070] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Zr alloy, Al-5Ti-1B alloy wire and aluminum ingots with a purity of 99.7%, zinc ingots with a purity of 99.9%, and purity 99.9% magnesium ingots are used as raw materials;

[0071] Step 2: Heat and melt the aluminum ingot at 775°C, then add 4.8% zinc ingot, 1.6% magnesium ingot, 0.75% Al-20Cu alloy, 1.25% Al-20Mn alloy, 1.25% Al-10Cr alloy and 1.25% Al-10Zr alloy are stirred and melted into aluminum alloy liquid;

[0072] S...

Embodiment 3

[0080] The high-strength, toughness and anti-corrosion aluminum alloy for rail transit is composed of the following components in mass percentage: Zn 4.9%, Mg 1.5%, Cu 0.1%, Mn 0.3%, Cr 0.15%, Zr 0.15%, Ti 0.01%, B 0.002%, Fe≤0.15%, Si≤0.1%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%.

[0081] The extrusion method of the aluminum alloy comprises the following steps:

[0082] The first step: select Al-20Cu alloy, Al-20Mn alloy, Al-10Cr alloy, Al-10Zr alloy, Al-5Ti-1B alloy wire and aluminum ingots with a purity of 99.7%, zinc ingots with a purity of 99.9%, and purity 99.9% magnesium ingots are used as raw materials;

[0083] Step 2: Heat and melt the aluminum ingot at 780°C, then add 4.9% zinc ingot, 1.5% magnesium ingot, 0.5% Al-20Cu alloy, 1.5% Al-20Mn alloy, 1.5% Al-10Cr alloy and 1.5% Al-10Zr alloy are stirred and melted into aluminum alloy liquid;

[0084] Step 3: U...

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Abstract

The invention discloses high-strength high-toughness anti-corrosion aluminum alloy for rail traffic and an extrusion method of the high-strength high-toughness anti-corrosion aluminum alloy. The high-strength high-toughness anti-corrosion aluminum alloy is prepared from the following components in percentage by mass: 4.6 to 4.9 percent of Zn, 1.5 to 1.8 percent of Mg, 0.1 to 0.2 percent of Cu, 0.2to 0.3 percent of Mn, 0.1 to 0.15 percent of Cr, 0.1 to 0.15 percent of Zr, 0.01 to 0.015 percent of Ti, 0.002 to 0.003 percent of B, less than or equal to 0.15 percent of Fe, less than or equal to 0.1 percent of Si and the balance of Al and other inevitable impurities. The extrusion method comprises the following steps: melting of aluminum alloy liquid, in-furnace spray blowing refining, onlinegrain refining, online degassing and filtering, semicontinuous casting, ingot homogenizing, heating and extruding, online quenching and artificial ageing treatment. The high-strength high-toughness anti-corrosion aluminum alloy disclosed by the invention is high in strength and good in plasticity, has excellent impact fracture toughness and excellent stress corrosion resistance, and is suitable for rail traffic vehicles.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy profiles and extrusion thereof, in particular to a high-strength, toughness, corrosion-resistant aluminum alloy used in rail transit and an extrusion method thereof. Background technique [0002] With the development of lightweight rail vehicles such as bullet trains, high-speed rail, and subways in China, the application of aluminum alloys in rail vehicles is expanding. Rail vehicles have high requirements on the comprehensive performance of aluminum alloys, such as high strength, plasticity, excellent impact fracture toughness and stress corrosion resistance, so as to improve the safety, impact resistance and durability of rail vehicles Wait. 7005 alloy is a high-strength aluminum alloy that can be strengthened by heat treatment. It has high strength and excellent extrusion performance. However, when it is used in rail vehicles, there are generally problems of insufficient impact fractur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06C22F1/053
CPCC22C21/10C22C1/026C22C1/03C22C1/06C22F1/053
Inventor 陈慧林玉金黄志其王顺成
Owner 佛山市三水凤铝铝业有限公司
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