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Aluminum profile for high-cold EMUs and preparation method thereof

A technology for EMUs and aluminum profiles, applied in the field of aluminum profiles, can solve the problem of not being able to adapt to the environment in the cold area of ​​the north, etc.

Active Publication Date: 2016-03-09
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

The working temperature of ordinary EMUs is from minus 25°C to minus 40°C, which is far from being able to adapt to the environment in the cold northern regions.

Method used

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  • Aluminum profile for high-cold EMUs and preparation method thereof

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Embodiment 1

[0026] An aluminum profile for high-cold EMUs, containing metal substances in the following mass percentages:

[0027] Si0.4-0.7%, Fe≤0.20%, Mg0.5-0.75%, Mn0.01-0.2%, Cu≤0.05%, Cr≤0.1%, Zn≤0.08%, Ti0.02-0.04%, single impurity The amount of Al is ≤0.05%, the sum of impurities is ≤0.15%, and the rest is Al.

[0028] 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.

[0029] A preparation method of the aluminum profile for the high-cold multiple train set, which comprises the following steps:

[0030] (1) Removal of impurities in the furnace body: Before casting, the high temperature in the furnace must be 800°C to remove the dross on the furnace wall and bottom of the furnace, and use an iron rake to completely remove the remaining aluminum liquid from the furnace to remov...

Embodiment 2

[0040] A preparation method of the aluminum profile for the high-cold multiple train set, which comprises the following steps:

[0041] 1. Drain or cast the molten aluminum in the furnace completely before feeding, and then raise the temperature in the furnace to 800°C, sprinkle no less than 15kg of slag cleaning agent, keep it warm for 5 minutes, and then use a large shovel to clean the slag line and furnace Shovel off the dross on the wall and bottom of the furnace, and use an iron rake to remove the remaining molten aluminum completely out of the furnace.

[0042] 2. The aluminum ingots must be clean and dry before feeding. According to the production plan, weigh the aluminum ingots with a purity of 99.70% and above, and add them at the top of the scrap materials for the first time. Electrolytic aluminum liquid is not allowed, and weigh the intermediate alloys that need to be input. , the master alloy of aluminum-silicon alloy, aluminum-copper alloy, aluminum-chromium alloy...

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Abstract

The invention discloses an aluminum profile for a motor train unit running in high and cold regions. The aluminum profile comprises the following metal substances in percentage by weight: 0.4-0.7% of Si, less than or equal to 0.20% of Fe, 0.5-0.75% of Mg, 0.01-0.2% of Mn, less than or equal to 0.05% of Cu, less than or equal to 0.1% of Cr, less than or equal to 0.08% of Zn, 0.02-0.04% of Ti, less than or equal to 0.05% of single impurities, less than or equal to 0.15% of total impurities and the balance of Al. The invention further discloses a preparation method of the aluminum profile for the motor train unit running in high and cold regions. The aluminum profile for the motor train unit running in high and cold regions provided by the invention satisfies the standard requirements of low-temperature fatigue of the motor train unit running in high and cold regions. The application temperature of the common motor train unit ranges from 25 DEG C below zero to 40 DEG C. The aluminum profile disclosed by the invention is not broken in low-temperature fatigue test which is carried out for 107 cycles at 40 DEG C below zero.

Description

technical field [0001] The invention relates to an aluminum profile, in particular to an aluminum profile for high-cold train sets and a preparation method thereof. Background technique [0002] Aluminum alloy has low density and good mechanical properties, so it is widely used in high-speed EMUs. The working temperature of ordinary EMUs is from minus 25°C to minus 40°C, which is far from being able to adapt to the environment in the cold northern regions. The alpine train will operate in the Northeast, Inner Mongolia and other northern regions, where the temperature can reach minus 37°C. As we all know, once the high-speed EMU operating area enters the alpine region from the non-alpine region, the aluminum alloy, non-metal, rubber and other raw materials usually used in the high-speed EMU will become brittle and hard as the temperature decreases. The performance of the alloy profile has an important impact, especially for the low temperature fatigue strength, which is a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03C22F1/04
Inventor 张培良李瑞清王明坤张艳涛
Owner 龙口市丛林铝材有限公司
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