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Aluminum Alloy Layered Distribution Plane Solidification Casting Device and Casting Method

A technology of aluminum alloy layer and flow distribution, applied in casting equipment, control of pouring molten metal from casting ladle, manufacturing tools, etc. effect of stress

Active Publication Date: 2019-04-23
NORTHEASTERN UNIV LIAONING
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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 Layered Distribution Plane Solidification Casting Device and Casting Method
  • Aluminum Alloy Layered Distribution Plane Solidification Casting Device and Casting Method
  • Aluminum Alloy Layered Distribution Plane Solidification Casting Device and Casting Method

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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Abstract

An aluminum alloy layered flow planar solidification casting device and a casting method thereof belong to the technical field of aluminum alloy ingot casting. The device includes a bracket, a horizontally movable translational diverting mechanism is provided on the upper part of the bracket, a flow control mechanism is provided at the outlet of the translational diverting mechanism; a casting box is provided below the translational diverting mechanism, and a water spray is provided below the casting box systems and cooling plate systems. Method, the cooling plate system is raised into the casting box, and the aluminum alloy liquid enters the shunt trough and enters the guide rod sleeve; the second motor is started to control the flow of the aluminum alloy liquid; the first motor is started, and the moving plate drives the shunt trough to move horizontally, and the aluminum alloy The liquid flows to the top of the cooling plate in a laminar manner; when the aluminum alloy solidified layer can support it, start the cooling plate cylinder to lower the cooling plate system; then push the water spray system in to spray water for cooling; control the descending speed of the main oil cylinder , until the casting reaches the predetermined thickness; after all cooling, stop spraying water, pull out the water spray system, take out the ingot, and the 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 Patents(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 LIAONING
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