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Aluminium alloy large broad width thin-wall rail car body floor profile extrusion technology

An aluminum alloy and profile technology, applied in metal extrusion, metal extrusion control equipment, metal processing equipment, etc., can solve the problems of a large number of splicing welds and poor surface quality, and reduce the number of welds and welding defects. , the effect of improving quality and production efficiency and reducing processing costs

Inactive Publication Date: 2020-04-28
CHINA ZHONGWANG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, in order to solve the problems of poor surface quality and large number of spliced ​​welds in the extrusion production process of the above-mentioned rail car body floor profile, the present invention provides an aluminum alloy large-width thin-wall rail car body floor profile extrusion craft

Method used

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  • Aluminium alloy large broad width thin-wall rail car body floor profile extrusion technology
  • Aluminium alloy large broad width thin-wall rail car body floor profile extrusion technology
  • Aluminium alloy large broad width thin-wall rail car body floor profile extrusion technology

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Embodiment

[0032] Such as Figure 1~3The extrusion process of the aluminum alloy large and wide thin-walled rail car body floor profile comprises the following steps:

[0033] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0034] element Si Fe Cu mn Mg Cr Zn Ti Zr Mn+Cr Al content 0.65 0.10 0.05 0.25 0.45 0.10 0.10 0.05 0.04 0.35 margin

[0035] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

[0036] B. Casting: Put the prepared aluminum alloy raw materials into the smelting furnace and evenly mix them to melt them into liquid aluminum alloys. The aluminum alloy is melted and cast into aluminum alloy cast rod, the diameter of the aluminum alloy cast rod is 765mm, and the length is 1530mm; during the refining process, Al-5Ti-B wire refining agent is added, and the online degassing adopts double rotors, and the flow rate of argon gas is 3.2~7.1m 3 / h, the flow rate of chlorine gas is 0~0.0...

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Abstract

The invention belongs to the technical field of aluminium profile processing technology and relates to an aluminium alloy large broad width thin-wall rail car body floor profile extrusion technology.An aluminium alloy cast ingot comprises the following components in percentage by mass: 0.60-0.70% of Si, equal to or less than 0.25% of Fe, 0.03-0.08% of Cu, 0.20-0.30% of Mn, 0.45-0.55% of Mg, 0.10-0.20% of Cr, equal to or less than 0.10% of Zn, equal to or less than 0.05% of Ti, 0.30-0.50% of Mn+Cr, 0.03-0.05% of Zr, equal to or less than 0.05% of a single impurity, equal to or less than 0.15%of total amount of impurities, and the balance of Al. A thin-wall profile with the width being 1000 mm is produced through selecting reasonable alloy components and extruding equipment, innovating diedesign, optimizing die structure and controlling a key extruding process system, and the problems that the floor profile is non-uniform in flow rate and has waves and twisting are solved, so that thedimensional accuracy, the surface quality and the physical and chemical property of the profile can reach the standard of the technical protocol, and stable mass production of the large broad width thin-wall floor profile is realized.

Description

technical field [0001] The invention belongs to the technical field of aluminum profile processing technology, and relates to an aluminum alloy large-width thin-wall rail car body floor profile extrusion process. Background technique [0002] Light weight and high speed have become an important symbol of modern transportation. The use of aluminum alloy materials is an effective measure to reduce the weight of the car body. In order to adapt to the development, countries all over the world are vigorously developing and manufacturing structural parts for aluminum alloy car bodies. The development of high-quality ultra-thin and ultra-wide aluminum alloy component preparation technology plays a vital role in promoting the development of the transportation industry. [0003] The development of rail transit has put forward higher requirements for rail car body materials, and the car body structure design has begun to develop in the direction of weight reduction and weld reduction....

Claims

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Application Information

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IPC IPC(8): B21C23/02B21C31/00C22C21/02C22C1/03C22C1/06C22F1/043
CPCB21C23/02B21C31/00C22C1/026C22C1/03C22C1/06C22C21/02C22F1/002C22F1/043
Inventor 王睿李延军杨志勇王义斌王爽何金
Owner CHINA ZHONGWANG
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