Thin-walled aluminum profile for rail train bodies

A technology for rail trains and aluminum profiles, which is applied in the field of aluminum alloy materials and can solve problems such as general mechanical properties

Active Publication Date: 2020-02-21
ANHUI XIN FA ALUMINUM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the material used for the hollow profiles of rail train bodies is mostly 6005A aluminum alloy, which has good welding performance, but its mechanical properties are average.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A rail train body thin-walled aluminum profile, comprising the following components by weight percentage:

[0022] Si 0.66%, Fe 0.18%, Mn 0.24%, Mg 0.42%, Cr 0.04%, Ti 0.04%, Cu 0.03%, La 0.14%, Sr 0.16%, Ce 0.05%, and the balance is Al.

[0023] Preferably, the preparation method of the thin-walled aluminum profile of the rail train car body is as follows:

[0024] S1. Homogenization annealing: First, heat the aluminum alloy ingot obtained by melting and casting according to the composition at 535°C for 2 hours, then heat it up to 560°C for 3 hours, and finally hold it at 580°C for 5 minutes, and then cool it to room temperature by air cooling;

[0025] S2. Hot extrusion: Hot extrude the ingot cooled in step S1 on an extruder, the extrusion temperature is 500°C, the extrusion ratio is 41.5, and the extrusion speed is 1m / min, then water-cooled and quenched, first at 8°C Cool to 280°C at a cooling rate of / s, then cool to 150°C at a cooling rate of 4°C / s, and finally co...

Embodiment 2

[0029] A rail train body thin-walled aluminum profile, comprising the following components by weight percentage:

[0030] Si 0.7%, Fe 0.22%, Mn 0.26%, Mg 0.45%, Cr 0.05%, Ti 0.06%, Cu 0.035%, La 0.18%, Sr 0.14%, Ce 0.06%, and the balance is Al.

[0031] Preferably, the preparation method of the thin-walled aluminum profile of the rail train car body is as follows:

[0032] S1. Homogenization annealing: First, heat the aluminum alloy ingot obtained by melting and casting according to the composition at 540°C for 3 hours, then heat it up to 570°C for 4 hours, and finally hold it at 583°C for 6 minutes, and then cool it to room temperature by air cooling;

[0033] S2, hot extrusion: the ingot cooled in step S1 is hot-extruded on an extruder, the extrusion temperature is 510°C, the extrusion ratio is 43.5, and the extrusion speed is 1.5m / min, then water-cooled and quenched, first with 10 Cool to 300°C at a cooling rate of ℃ / s, then cool to 180°C at a cooling rate of 4.5°C / s, and ...

Embodiment 3

[0037] A rail train body thin-walled aluminum profile, comprising the following components by weight percentage:

[0038] Si 0.72%, Fe 0.24%, Mn 0.3%, Mg 0.46%, Cr 0.08%, Ti 0.08%, Cu 0.05%, La 0.2%, Sr 0.12%, Ce 0.05%, and the balance is Al.

[0039] Preferably, the preparation method of the thin-walled aluminum profile of the rail train car body is as follows:

[0040] S1. Homogenization annealing: First, heat the aluminum alloy ingot obtained by melting and casting according to the composition at 550°C for 4 hours, then heat it up to 575°C for 5 hours, and finally hold it at 585°C for 8 minutes, and then cool it to room temperature by air cooling;

[0041] S2, hot extrusion: the ingot cooled in step S1 is hot-extruded on an extruder, the extrusion temperature is 515°C, the extrusion ratio is 45.5, and the extrusion speed is 2.5m / min, then water-cooled and quenched, first with 10 Cool to 310°C at a cooling rate of ℃ / s, then cool to 180°C at a cooling rate of 5°C / s, and fina...

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PUM

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Abstract

The invention discloses a thin-walled aluminum profile for rail train bodies. The thin-walled aluminum profile is prepared from components including, by weight, 0.66%-0.72% of Si, 0.18%-0.24% of Fe, 0.24%-0.3% of Mn, 0.42%-0.46% of Mg, 0.04%-0.08% of Cr, 0.04%- 0.08% of Ti, 0.03%-0.05% of Cu, 0.14%-0.2% of La, 0.12%-0.16% of Sr, 0.05%-0.08% of Ce and the balance Al. The thin-walled aluminum profile for the rail train bodies has the excellent tensile strength, fatigue strength, ductility and corrosion resistance, has the good comprehensive performance, can better meet the use requirements of the rail train bodies and can prolong the service life of the rail train bodies and improve the safety of the rail train bodies.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a thin-walled aluminum profile for a rail train body. Background technique [0002] Aluminum alloy has the advantages of small specific gravity, high specific strength, and good processing performance, and has been widely used in various fields. With the development of rail train body processing technology and the trend of lightweight vehicles, aluminum profiles are gradually used in the structural materials of rail train bodies. The rail train body is generally a thin-walled hollow section, which has the characteristics of large size, large cross-section, and complex shape. Moreover, the external environment in contact with the rail train body is complex and changeable, and there is a certain probability of corrosion or stress fracture. Higher requirements are put forward for the tensile strength, fatigue strength, elongation, corrosion resistance and other pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043B61D17/04
CPCB61D17/041C22C21/02C22F1/002C22F1/043
Inventor 唐开健王超李亨贡玉楼
Owner ANHUI XIN FA ALUMINUM PROD
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