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6-series railway vehicle suspension arm aluminum profile and preparation method thereof

A rail vehicle and suspension arm technology, which is applied in the field of 6-series rail vehicle suspension arm aluminum profiles and its preparation, can solve problems such as large width, coarse microscopic grains, and poor uniformity of structure

Active Publication Date: 2014-10-01
龙口市丛林铝材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems existing in aluminum profiles in the prior art: Although aluminum alloy has low density and light weight, its comprehensive performance (strength, fracture ductility, microstructure) restricts its application
The profile has a large width, a thick thickness, and a gap of nearly 4 times in wall thickness. The uniformity of the structure is poor. The traditional production process can only sacrifice strength to improve the fracture ductility and the microscopic grains are relatively coarse, which seriously restricts the use of 6-series aluminum alloys in car body profiles. Applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An aluminum profile for the suspension arm of a 6-series rail vehicle, containing metal substances in the following mass percentages: Si0.66%, Fe0.11%, Mg0.63%, Mn0.20%, Cu0.002%, Cr0.119%, Zn0 .012%, Ti0.057%, and the rest is Al.

[0029] A method for preparing aluminum profiles for suspension arms of 6-series rail vehicles, comprising the steps of:

[0030] ①The furnace must be drained and cleaned before charging;

[0031] ②In the charge, the amount of primary waste (profile waste, cast rod cutting head and tail) accounts for no more than 40% of the total raw materials by weight, and must be of the same alloy. The waste must be clean and dry before feeding. When charging the furnace, the furnace temperature It should be higher than 600°C. According to the shape of waste, first load small pieces or flake waste, and then add large pieces such as rod heads.

[0032] ③ When the charge melts and collapses, sprinkle 16Kg of ordinary covering agent evenly on the surface of...

Embodiment 2

[0050] An aluminum profile for the suspension arm of a 6-series rail vehicle, containing metal substances in the following mass percentages: Si0.66%, Fe0.11%, Mg0.63%, Mn0.20%, Cu0.002%, Cr0.119%, Zn0 .012%, Ti0.057%, and the rest is Al.

[0051] Explanation: Although there is no iron in the master alloy, the master alloy used in the present invention will introduce iron element more or less from some impurities, so the content of iron element needs to be controlled in the composition of the profile.

[0052] A preparation method for aluminum profiles of suspension arms of 6 series rail vehicles, comprising the steps of:

[0053] (1) Cleaning of each furnace body and devices;

[0054] (2) Smelting: Calculate the amount of each metal raw material and prepare the metal raw material according to the proportion. The metal raw material includes: first-class scrap, aluminum ingot with a purity of 99.70% or more, and an intermediate alloy. The intermediate alloy is aluminum-silicon ...

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Abstract

The invention discloses a 6-series railway vehicle suspension arm aluminum profile which contains the following metal substances in percentage by mass: 0.6-0.7% of Si, less than 0.15% of Fe, 0.5-0.7% of Mg, 0.02-0.25% of Mn, less than 0.01% of Cu, 0.1-0.25% of Cr, less than 0.05% of Zn, 0.03-0.06% of Ti and the balance of Al. The invention also discloses a preparation method of the 6-series railway vehicle suspension arm aluminum profile. The 6-series railway vehicle suspension arm aluminum profile has optimized chemical components as compared with the aluminum profile in the prior art, the Mn element content is enhanced to 0.2%, and the Cr element content is enhanced to 0.12%; the Mn can be utilized to enhance the recrystallization temperature characteristic and inhibit the crystal grains from growing, thereby refining the crystal grains of the profile and enhancing the microstructure of the material (grain refinement); and the optimized aluminum profile has the advantages of high tensile strength, high yield strength and high elongation percentage.

Description

technical field [0001] The invention relates to an aluminum profile, in particular to an aluminum profile used for a suspension arm of a 6-series rail vehicle and a preparation method thereof. Background technique [0002] In addition to the advantages of low density, good electrical conductivity, high thermal conductivity, and corrosion resistance, aluminum alloys are widely used in production because they can greatly reduce product weight and increase structural stability by using aluminum alloys as structural materials. In particular, the 6-series aluminum alloy, which is used as a material for permanent magnet trains, can not only reduce the weight of the car body, but also significantly reduce the energy consumption of the car while meeting the structural strength requirements. It can be seen that aluminum alloy will replace steel material and become the main material of future train body. As one of the main load-bearing materials of rail vehicles, rail vehicle suspens...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06C22F1/043C22F1/047C22F1/05
Inventor 张培良苏振佳王明坤栾守国张人杰
Owner 龙口市丛林铝材有限公司
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