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Preparation device and method of aluminum alloy ingot with ultra-large dimension

An aluminum alloy casting ingot, super-large-sized technology, applied in the field of metal material processing, can solve the problems of electromagnetic field intensity attenuation, low utilization rate of electromagnetic field, poor stirring effect at the core of the melt, etc., to achieve uniform temperature field and composition field, reduce Homogenization and processing costs, the effect of fine and uniform coagulation structure

Active Publication Date: 2017-05-10
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electromagnetic fields of the above-mentioned methods are all applied from the outside of the crystallizer. As the size of the ingot increases, not only the stirring effect at the core of the melt will become worse, but also because there is a large air gap between the coil and the metal melt. The attenuation of the electromagnetic field strength is very serious, and the utilization rate of the electromagnetic field is very low

Method used

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  • Preparation device and method of aluminum alloy ingot with ultra-large dimension
  • Preparation device and method of aluminum alloy ingot with ultra-large dimension

Examples

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Effect test

Embodiment 1

[0047] A large-scale aluminum processing enterprise produces 7005 aluminum alloy ingots with a specification of Φ788mm. It has strict requirements on the quality of the ingots: feathery grains, cracks, pores, and white spots are not allowed; porosity does not exceed 2 levels; bright grains do not exceed 10 points , each point ≤ 3mm; grain size lower than grade 2; slag inclusion: outer diameter ≤ 750mm requires no more than 2 points, single point area ≤ 0.3 square millimeters, outer diameter > 750mm requires no more than 4 points, single point Area ≤ 0.2 square millimeters.

[0048] Adopt the 7005 aluminum alloy casting ingot produced by the present invention, the device structure parameter is: heat preservation unit 13 material is ceramic material, and wall thickness is 30mm; The material of support unit 12 is stainless steel, and external dimension is Φ300mm; The high thermal conductivity housing 17 of cooling unit The material is dispersed copper alloy, and the bottom hollow...

Embodiment 2

[0053] A large-scale aluminum processing enterprise prepares 5052 aluminum alloy flat ingots with specifications of 560mm×2240mm. It is required that there are no cracks, pores and inclusions inside the ingot; Grade II, and the lateral and longitudinal grain size deviation does not exceed 15%; the height of segregation nodules is less than 4mm.

[0054] The 5052 aluminum alloy flat ingot produced by the present invention has the structural parameters of the device: the heat preservation unit 13 is made of high-temperature ceramics with a thickness of 40 mm; the support unit 12 is made of stainless steel with an outer dimension of Φ200 mm; Copper alloy, the bottom hollow tube 14 is made of pure copper; two melt processors 3 are arranged equidistantly inside the hot top 2 and the crystallizer 6, and the center distance is 700mm. The bottom end of the high thermal conductivity shell 17 is flush with the bottom end of the crystallizer 6 . The ampere-turns of the electromagnetic c...

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Abstract

The invention relates to a preparation device and method of an aluminum alloy ingot with the ultra-large dimension, and belongs to the field metal material processing. The device mainly comprises a melt processor, a lifting mechanism, a hot top, a crystallizer, a water tank and a dummy ingot; the hot top is installed above the crystallizer, the dummy ingot is arranged below the crystallizer, the crystallizer is fixedly installed on the water tank, the metal processor is connected with the lifting mechanism, the lifting mechanism is fixed to the water tank, and in the casting process, the melt processor is placed on the hot top and / or inside the crystallizer through the lifting mechanism. Accordingly, electromagnetic field applying and forced cooling are conducted on alloy melt on the hot top and inside the crystallizer in the continuous casting process from the interior, heat exchange and mass transfer of the core of the alloy melt are accelerated, the uniformity of a temperature field and a component field of the melt is improved, and fine grain homogeneous casting of the aluminum alloy ingot with the ultra-large dimension is achieved. According to the preparation device and method of the aluminum alloy ingot with the ultra-large dimension, the implementation effect is significant, the production efficiency is high, and the preparation device and method are likely to be combined with large-scale industrial production and have a wide industrial application prospect in the manufacturing fields of aerospace, rail transit, ships and the like.

Description

technical field [0001] The invention relates to a preparation device and method for an ultra-large aluminum alloy ingot, belonging to the field of metal material processing. Background technique [0002] Super-large aluminum alloys, especially high-alloyed high-strength aluminum alloy ingots, play an important role in aerospace, rail transit, shipbuilding and other large-scale equipment manufacturing industries. Super-large aluminum alloy ingots prepared by traditional semi-continuous casting methods inevitably have defects such as poor surface quality, coarse and uneven structure, serious composition segregation, and easy cracking, resulting in poor product quality and low yield. Moreover, the larger the ingot size and the higher the degree of alloying, the more prominent these defects will be. The solution to these problems has a lot to do with the homogenization control of the temperature field and composition field during the alloy melt solidification process, so it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115B22D11/112B22D11/041B22D11/14
CPCB22D11/041B22D11/112B22D11/115B22D11/141
Inventor 张志峰张少明邱阳杨玉洁陈春生
Owner 有研金属复材技术有限公司
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