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Device for preparing aluminum alloy cast ingot by using induction coil and permanent magnetism mixing in combination with DC

An aluminum alloy ingot and induction coil technology is applied in the field of the device field of the induction coil and the permanent magnet stirring to synergize the DC preparation of the aluminum alloy ingot, which can solve the problems of serious segregation, easy cracking, coarse and uneven structure of the ingot, and the like. Effects of uniform composition, uniform temperature field and composition field, avoiding adverse effects

Active Publication Date: 2018-09-04
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for preparing aluminum alloy ingots in cooperation with induction coils and permanent magnetic stirring DC. In view of the above-mentioned shortcomings in the prior art of casting large-size aluminum alloy ingots, the electromagnetic field generated by the induction coil and the The magnetic fields generated by the permanent magnets complement each other, so that the entire melt in the crystallizer is under the action of an external field, and the temperature field and composition field are fully uniform, and the technology to solve defects such as coarse and uneven structure, serious segregation, and easy cracking in the ingot structure problem

Method used

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  • Device for preparing aluminum alloy cast ingot by using induction coil and permanent magnetism mixing in combination with DC
  • Device for preparing aluminum alloy cast ingot by using induction coil and permanent magnetism mixing in combination with DC
  • Device for preparing aluminum alloy cast ingot by using induction coil and permanent magnetism mixing in combination with DC

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Embodiment 1

[0039] The device structure of induction coil and permanent magnetic stirring in cooperation with DC to prepare aluminum alloy ingots is as follows figure 1 As shown, it includes a crystallizer, a hot top 15, an induction coil 13, a permanent magnet stirring unit and a dummy bar 9; the induction coil 13 is located in the crystallizer cooling water jacket 12; the inner wall of the crystallizer jacket is inlaid with a graphite ring 14;

[0040]The upper part of the permanent magnet stirring unit is the drive motor 1, and the bottom of the drive motor 1 is the magnetic sleeve 3. The top plate of the magnetic sleeve 3 is fixedly connected with the shell of the drive motor 1, and the magnetic sleeve 3 is covered with a heat-insulating The sleeve 2, the driving motor 1 and the connecting shaft 4 are assembled together, and the bottom end of the connecting shaft 4 is fixedly connected to the permanent magnet 10; the connecting shaft 4 and the permanent magnet 10 are located in the mag...

Embodiment 2

[0053] Device structure is the same as embodiment 1;

[0054] Method is with embodiment 1, and difference is:

[0055] (1) The prepared product is a round ingot of 7050 aluminum alloy, Φ300mm;

[0056] (2) The temperature of the aluminum alloy melt when pouring into the crystallizer is 730-740°C;

[0057] (3) Casting speed 120mm / min;

[0058] The surface of the obtained 7050 aluminum alloy ingot is smooth, without obvious cold shut, no cracks inside the ingot, and the structure is fine and uniform.

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Abstract

The invention discloses a device for preparing an aluminum alloy cast ingot by using an induction coil and permanent magnetism mixing in combination with DC (Direct chill Casting). The device comprises a crystallizer, the induction coil and a permanent magnet mixing unit; the induction coil is located in a crystallizer cooling jacket; a driving motor is arranged at the upper part of the permanentmagnet mixing unit; a magnetism-conductive sleeve is arranged below the driving motor; the magnetism-conductive sleeve is sleeved with a heat insulation jacket; the driving motor and a connecting shaft are assembled together; the bottom end of the connecting shaft is fixedly connected with a permanent magnet; and the connecting shaft and the permanent magnet are located in the magnetism-conductivesleeve. The device can simultaneously utilize the induction coil to generate an electromagnetic field and the permanent magnet to generate a magnetic field in the direct chill casting process, composite field casting is realized through adjustment on parameters of the induction coil and the permanent magnet, uniformity of a melt temperature field and a component field is ensured, uniform and fineingot structures are obtained, center negative segregation and cast ingot cracking phenomena are reduced.

Description

technical field [0001] The invention belongs to the technical field of semi-continuous casting of light alloys, in particular to a device for preparing aluminum alloy ingots in cooperation with DC with induction coils and permanent magnetic stirring. Background technique [0002] Semi-continuous casting (DC) is the most important method for producing aluminum alloys. It has the advantages of high cooling intensity, fast crystallization speed, fine structure, and high yield. However, in the traditional semi-continuous casting process, due to the single cooling method, the cooling intensity is high. , the temperature gradient is large, the ingot solidifies from the outside to the inside, the liquid cavity is deep, and the cooling rate of the core of the ingot is slow, which is prone to defects such as uneven structure, composition segregation and even cracking. Especially when preparing large-size high-strength aluminum alloys, the structure, composition, and performance are u...

Claims

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Application Information

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IPC IPC(8): B22D11/115
CPCB22D11/003B22D11/115
Inventor 朱庆丰刘旭东左玉波刘凡正张恩阁康延磊
Owner NORTHEASTERN UNIV
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