High-speed rail train aluminum profile and preparation method thereof

Abstract

The invention discloses a high-speed rail train aluminum profile which comprises the following metals in percentage by mass: 0.1-0.2% of Cu, 0.20-0.40% of Mn, 1.0-2.0% of Mg, 0.1-0.3% of Cr, 4.0-6.0% of Zn, 0.1-0.2% of Zr, at most 0.10% of Ti, at most 0.30% of Fe, at most 0.35% of Si, at most 0.1% of V, at most 0.15% of all impurities, and the balance of Al. The invention also discloses a preparation method of the high-speed rail train aluminum profile. The high-speed rail train aluminum profile has obvious higher yield strength, tensile strength, elongation percentage and the like than the existing aluminum alloy.

Description

technical field

[0001] The invention relates to an aluminum profile, in particular to an aluminum profile with ultra-high strength, high toughness and high corrosion resistance for high-speed rail car bodies. Background technique

[0002] With the rapid development of the transportation industry, the application of lightweight aluminum alloys in high-speed train body materials, although superhard aluminum alloys have light weight, high specific strength, easy processing, good corrosion resistance, and low cost Low-level advantages, but due to the existing alloy and raw material selection and production process, although the material strength is high, the fracture toughness and stress corrosion resistance cannot meet the needs of the car body market for high-strength, high-toughness, and high-corrosion-resistant materials. The main structural materials still rely on imports, which greatly restricts the development of my country's rail transit industry. Using aluminum alloy as ...

Examples

Embodiment 1

[0032] The aluminum profile of the high-speed rail car body of the present invention contains the following metals in mass percentage: Cu0.1-0.2%, Mn0.20-0.40%, Mg1.0-2.0%, Cr0.1-0.3%, Zn4.0-6.0%, Zr0 .1-0.2%, Ti≤0.10%, Fe≤0.30%, Si≤0.35%, V≤0.1%, the sum of impurities≤0.15%, and the rest is Al.

[0033] The preparation method of the high-speed rail car body aluminum profile of the present invention comprises the following steps:

[0034] (1) Alloy smelting: In the smelting furnace, aluminum ingots and master alloys are used to smelt alloys. The master alloys include aluminum copper, aluminum chromium, aluminum zirconium, aluminum manganese, magnesium ingots, zinc ingots and aluminum titanium, except for all Except for the magnesium ingots, zinc ingots and aluminum-titanium ingots mentioned above, other intermediate alloys are added on the upper part of the added aluminum ingots, and then ignited and melted, and the chemical analysis samples are taken. Add the aluminum and ti...

Embodiment 2

[0047] The mass percent content of each component of the aluminum alloy of the present invention is: Cu0.1-0.2%, Mn0.20-0.40%, Mg1.0-2.0%, Cr0.1-0.3%, Zn4.0-6.0%, Zr0. 1-0.2%, Ti≤0.10%, Fe≤0.30%, Si≤0.35%, V≤0.1%, total impurities≤0.15%

[0048] The preparation method of aluminum alloy of the present invention comprises the following steps:

[0049] 1) Alloy melting:

[0050] The casting workshop weighs the master alloys that need to be put in, and aluminum copper, aluminum chromium, aluminum zirconium, aluminum manganese, magnesium ingots, zinc ingots and aluminum titanium master alloys should be used. Except for magnesium, zinc, aluminum and titanium, the master alloys are all added on the upper part of the aluminum ingot added for the first time, and then ignited and melted.

[0051] Add magnesium ingot, zinc ingot and Al-Ti master alloy before taking chemical analysis sample. First add Al-Ti master alloy (Al-Ti adding temperature 745±5℃), then add Zn ingot, and finally ...

technical field

[0001] The invention relates to an aluminum profile, in particular to an aluminum profile with ultra-high strength, high toughness and high corrosion resistance for high-speed rail car bodies. Background technique

[0002] With the rapid development of the transportation industry, the application of lightweight aluminum alloys in high-speed train body materials, although superhard aluminum alloys have light weight, high specific strength, easy processing, good corrosion resistance, and low cost Low-level advantages, but due to the existing alloy and raw material selection and production process, although the material strength is high, the fracture toughness and stress corrosion resistance cannot meet the needs of the car body market for high-strength, high-toughness, and high-corrosion-resistant materials. The main structural materials still rely on imports, which greatly restricts the development of my country's rail transit industry. Using aluminum alloy as ...

Examples

Embodiment 1

[0032] The aluminum profile of the high-speed rail car body of the present invention contains the following metals in mass percentage: Cu0.1-0.2%, Mn0.20-0.40%, Mg1.0-2.0%, Cr0.1-0.3%, Zn4.0-6.0%, Zr0 .1-0.2%, Ti≤0.10%, Fe≤0.30%, Si≤0.35%, V≤0.1%, the sum of impurities≤0.15%, and the rest is Al.

[0033] The preparation method of the high-speed rail car body aluminum profile of the present invention comprises the following steps:

[0034] (1) Alloy smelting: In the smelting furnace, aluminum ingots and master alloys are used to smelt alloys. The master alloys include aluminum copper, aluminum chromium, aluminum zirconium, aluminum manganese, magnesium ingots, zinc ingots and aluminum titanium, except for all Except for the magnesium ingots, zinc ingots and aluminum-titanium ingots mentioned above, other intermediate alloys are added on the upper part of the added aluminum ingots, and then ignited and melted, and the chemical analysis samples are taken. Add the aluminum and ti...

Embodiment 2

[0047] The mass percent content of each component of the aluminum alloy of the present invention is: Cu0.1-0.2%, Mn0.20-0.40%, Mg1.0-2.0%, Cr0.1-0.3%, Zn4.0-6.0%, Zr0. 1-0.2%, Ti≤0.10%, Fe≤0.30%, Si≤0.35%, V≤0.1%, total impurities≤0.15%

[0048] The preparation method of aluminum alloy of the present invention comprises the following steps:

[0049] 1) Alloy melting:

[0050] The casting workshop weighs the master alloys that need to be put in, and aluminum copper, aluminum chromium, aluminum zirconium, aluminum manganese, magnesium ingots, zinc ingots and aluminum titanium master alloys should be used. Except for magnesium, zinc, aluminum and titanium, the master alloys are all added on the upper part of the aluminum ingot added for the first time, and then ignited and melted.

[0051] Add magnesium ingot, zinc ingot and Al-Ti master alloy before taking chemical analysis sample. First add Al-Ti master alloy (Al-Ti adding temperature 745±5℃), then add Zn ingot, and finally ...