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Aluminum alloy laminar flow distribution plane solidification casting device and casting method thereof

An aluminum alloy layer and flow distribution technology, which is applied to casting equipment, control of molten metal pouring from ladles, manufacturing tools, etc., can solve problems such as incomplete improvement, avoid heat convection, avoid local overheating, and avoid cracks Effect

Active Publication Date: 2016-12-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the ingot size is larger, the liquid pocket at the inflow point is deeper, even if the diversion point is increased, the problem is still not completely improved

Method used

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  • Aluminum alloy laminar flow distribution plane solidification casting device and casting method thereof
  • Aluminum alloy laminar flow distribution plane solidification casting device and casting method thereof
  • Aluminum alloy laminar flow distribution plane solidification casting device and casting method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0085] The alloy is pure aluminum / 7050, the ingot size: thickness 300mm×width 600mm×length 800mm, the thickness of the 7050 alloy layer is 245mm,

[0086] Casting temperature: 720°C,

[0087] Casting speed (casting box drop speed): 60mm / min (pure aluminum), 20mm / min (7050 alloy),

[0088] Flow control method: lift the guide rod, 20mm (pure aluminum), 10mm (7050 alloy),

[0089] The running speed of translational diverter mechanism: 100mm / min (pure aluminum), 60mm / min (7050 alloy).

[0090] The cast ingot has no cracks, no cold shut on the surface, can be sawed in the cast state, and the inclusions reach A grade after ultrasonic flaw detection. The internal structure of the ingot is uniform, and the average grain size is 260 μm (see Figure 18 ). Macro segregation rate of alloying elements [(maximum value of ingot alloy element content - minimum value) / average value]: Zn is 3.1%, Mg is 5.9%, Cu is 6%, and the macroscopic composition clouds of Zn, Mg, and Cu are respectively...

Embodiment 2

[0092] The alloy is 5456 / 7055, the ingot size: thickness 300mm × width 600mm × length 800mm, the thickness of the 7055 alloy layer is 150mm,

[0093] Casting temperature: 720°C,

[0094] Casting speed (casting box drop speed): 20mm / min (7055 alloy), 15mm / min (5456 alloy),

[0095] Flow control method: lift the guide rod, 10mm (7055 alloy), 8mm (5456 alloy),

[0096] The running speed of the translational diverter mechanism: 60mm / min (7055 alloy), 60mm / min (5456 alloy).

[0097] The cast ingot has no cracks, no cold shut on the surface, can be sawed in the cast state, and the inclusions reach A grade after ultrasonic flaw detection. The internal structure of the ingot is uniform, and the average grain size is 260 μm (7055 alloy) and 250 μm (5456 alloy). The interface is clear, well bonded, free of pores and inclusions (see Figure 23 ), the alloy composition distribution in the thickness direction is shown in Figure 22 .

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PUM

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Abstract

The invention discloses an aluminum alloy laminar flow distribution plane solidification casting device and a casting method thereof, and belongs to the technical field of aluminum alloy ingot blank casting. The device comprises a support. A translation flow distribution mechanism capable of moving horizontally is arranged on the upper portion of the support. A flow control mechanism is arranged at an outlet of the translation flow distribution mechanism. A casting tank is arranged below the translation flow distribution mechanism. A water spraying system and a cooling plate system are arranged below the casting tank. The method includes the steps that the cooling plate system rises into the casting tank, and molten aluminum alloy enters a flow distribution groove and then enters a guide rod sleeve; a second motor is started to control flow of the molten aluminum alloy; a first motor is started, a movable plate drives the flow distribution groove to move horizontally, and the molten aluminum alloy flows to a cooling plate upper plate body in a laminar mode; when an aluminum alloy solidification layer can be supported, a cooling plate oil cylinder is started, and thus the cooling plate system descends; then the water spraying system is pushed in, and sprayed water is cooled; the descending speed of a main oil cylinder is controlled until casting reaches a preset thickness; and after all the cooling is completed, water spraying is stopped, the water spraying system is extracted, ingot castings are taken out, and accordingly casting is completed.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy ingot casting, and in particular relates to an aluminum alloy laminar distribution planar solidification casting device and a casting method thereof, which can be used for casting a single alloy and casting composite ingots of various alloys. Background technique [0002] Most of the ingots of aluminum alloy processing materials are prepared by DC casting method. The most notable feature of the DC semi-continuous casting solidification process is that the cooling intensity of the inside and outside of the melt is not the same, and there is a large temperature difference between the inside and outside of the ingot, resulting in asynchronous solidification of the inner and outer melts, which is prone to produce uneven structures on the cross-section of the ingot 1. The casting internal stress of the ingot is high, which is easy to cause cracks; at the same time, heat convection occurs in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D37/00B22D7/12
CPCB22D7/005B22D7/12B22D37/00
Inventor 崔建忠邵博张海涛秦克
Owner NORTHEASTERN UNIV
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