High-speed train aluminum alloy supporting groove and preparation method thereof

A technology for high-speed trains and aluminum alloys, applied in the field of aluminum alloys, can solve the problems of unclear evolution law of corrosion damage, increased maintenance costs of high-speed trains, and inability to evaluate the remaining life of components, so as to ensure mechanical strength and ductility, improve Dispersion and precipitation effect, the effect of improving solid solubility

Inactive Publication Date: 2021-09-28
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of specific corrosion parameters of this type of connector, the corrosion damage and the evolution law of corrosion damage of this type of connector are still unclear. but very few
Support channel structure throughout the car body therefore also makes it impossible to assess the remaining life of the components
At present, such corrosion problems are solved by directly replacing new parts, which greatly increases the maintenance cost of high-speed trains

Method used

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  • High-speed train aluminum alloy supporting groove and preparation method thereof
  • High-speed train aluminum alloy supporting groove and preparation method thereof
  • High-speed train aluminum alloy supporting groove and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The high-speed train aluminum alloy support channel aluminum alloy in this embodiment includes the following components in mass percentage: Zn: 5.0wt.%, Mg: 2.0wt.%, Ag: 1.0wt.%, Sc: 0.3wt.%. , Zr: 0.6wt.%, the balance is Al and unavoidable impurities;

[0025] Its preparation method is as follows:

[0026] First, add pure Al, pure Zn, and pure Mg into the melting furnace and heat to 700°C to melt, then add Al-20Ag master alloy and Al-25Sc master alloy after heating up to 720°C; then pass high-purity argon gas, at 730°C Keep it warm for 20 minutes, then add Al-25Zr master alloy and keep it warm for 1 hour, finally cool down to 680°C, let it stand for 15 minutes, and cast it at 660-690°C to make an aluminum alloy ingot. Then the aluminum alloy is homogenized, and the homogenization treatment is to keep warm at 430° C. for 20 hours. Then the obtained aluminum alloy ingot is subjected to low-temperature pre-extrusion, the extrusion temperature is 100 degrees, and the ext...

Embodiment 2

[0028] The high-speed train aluminum alloy support channel aluminum alloy in this embodiment includes the following components in mass percentage: Zn: 6.5wt.%, Mg: 3.0wt.%, Ag: 2.0wt.%, Sc: 0.5wt.%. , Zr: 0.7wt.%, the balance is Al and unavoidable impurities;

[0029] Its preparation method is as follows:

[0030] First, add pure Al, pure Zn, and pure Mg into the melting furnace and heat to 700°C to melt, then add Al-20Ag master alloy and Al-25Sc master alloy after heating up to 720°C; then pass high-purity argon gas, at 730°C Keep it warm for 20 minutes, then add Al-25Zr master alloy and keep it warm for 2 hours, finally cool down to 680°C, let it stand for 15 minutes, and cast it at 660-690°C to make an aluminum alloy ingot. Then the aluminum alloy is homogenized, and the homogenization treatment is to keep warm at 430° C. for 20 hours. Then the obtained aluminum alloy ingot is subjected to low-temperature pre-extrusion, the extrusion temperature is 100 degrees, and the ex...

Embodiment 3

[0032] The high-speed train aluminum alloy support channel aluminum alloy in this embodiment includes the following components in mass percentage: Zn: 7.5wt.%, Mg: 3.5wt.%, Ag: 2.5wt.%, Sc: 0.6wt.%. , Zr: 0.8wt.%, the balance is Al and unavoidable impurities;

[0033] Its preparation method is as follows:

[0034] First, add pure Al, pure Zn, and pure Mg into the melting furnace and heat to 700°C to melt, then add Al-20Ag master alloy and Al-25Sc master alloy after heating up to 720°C; then pass high-purity argon gas, at 730°C Keep it warm for 20 minutes, then add Al-25Zr master alloy and keep it warm for 2 hours, finally cool down to 680°C, let it stand for 15 minutes, and cast it at 660-690°C to make an aluminum alloy ingot. Then the aluminum alloy is homogenized, and the homogenization treatment is to keep warm at 430° C. for 20 hours. Then the obtained aluminum alloy ingot is subjected to low-temperature pre-extrusion, the extrusion temperature is 100 degrees, and the ex...

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Abstract

The invention provides a high-speed train aluminum alloy supporting groove aluminum alloy and a preparation method thereof, and mainly relates to the field of aluminum alloys. The method comprises the following steps: providing an aluminum alloy which comprises the following components in percentage by weight: 5.0-7.5wt% of Zn, 2.0-3.5wt% of Mg, 1.0-2.5 wt% of Ag, 0.3- 0.6wt% of Sc, 0.6-0.8 wt% of Zr, less than 0.02 wt% of impurity elements and the balance of Al; The high-speed train aluminum alloy supporting groove aluminum alloy has the beneficial effects that on the premise that the mechanical strength of the aluminum alloy is guaranteed, the corrosion resistance is good, and the maintenance cost of a high-speed train is greatly reduced.

Description

technical field [0001] The invention mainly relates to the field of aluminum alloys, in particular to aluminum alloy support grooves for high-speed trains and a preparation method thereof. Background technique [0002] High-speed trains inevitably come into contact with various corrosive environments during their service, among which Cl- in the marine environment poses the greatest threat to the corrosion damage of high-speed trains. With the extension of service time of high-speed trains, corrosion problems gradually appear. For example, the connecting part of the bracket of the equipment cabin and the support tank, wherein the bracket of the equipment cabin and the support tank are made of aluminum alloy, connected by 304 stainless steel angle steel and bolts. The corrosion potential of aluminum alloy is usually about -0.7 V, and the corrosion potential of stainless steel is about -0.2 V [5]. Corrosion problem. When galvanic corrosion occurs, the low-potential aluminum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03B22D7/00C22F1/053B21C23/00
CPCC22C21/10C22C1/026C22C1/03B22D7/005C22F1/053B21C23/002
Inventor 任伟才肖栋范坤郑和平马旭
Owner SHANDONG NANSHAN ALUMINUM
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