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Equipment for producing aluminum alloy hollow casting ingot and method of equipment

A hollow ingot, aluminum alloy technology, applied in the field of aluminum alloy, can solve the problems such as the melt easily blocking the hollow ingot, aluminum melt leakage, pulling leakage, etc.

Active Publication Date: 2012-12-05
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the current production process, the two most serious problems are: core holding and leakage
[0007] Leakage, its production process is similar to that of the core, but the difference is that the core mold is not wrapped after the ingot is pulled out of the crystallizer, but the solidified shell formed on the inner surface of the ingot is pulled out due to the high friction with the core mold. Pulling off will cause the aluminum melt in the molten pool to leak. The leaked aluminum melt is easy to contact with the secondary cooling water and explode. Can not stay, return to the molten pool, a serious explosion occurs

Method used

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  • Equipment for producing aluminum alloy hollow casting ingot and method of equipment
  • Equipment for producing aluminum alloy hollow casting ingot and method of equipment
  • Equipment for producing aluminum alloy hollow casting ingot and method of equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Electromagnetic semi-continuous casting of A390 hollow ingot

[0050] The composition of A390 alloy is listed in the following table:

[0051] A390 alloy composition (wt%)

[0052] Si Mg Cu mn Fe Al 16.0～18.0 0.45～0.65 4.0～5.0 0.10 0.05 margin

[0053] Equipment conditions: the crystallizer is Φ210mm, the mandrel is Φ60mm, the height is 60mm, and the taper is 1 o ;

[0054] (Such as figure 2 ) Before casting, the coil 24 is supplied with low-frequency alternating current to generate a low-frequency electromagnetic field, the frequency of the electromagnetic field is 45Hz, and the strength of the electromagnetic field is 5000At, and then the melt 32 is poured into the runner 31, and the melt 32 contacts the entrance of the shunt 26 before entering the shunt 26 The stopper 27, the melt 32 is blocked by the stopper 27 and is evenly distributed into the cavity 5 through the split hole 28 of the flow divider 26 in the circumfe...

Embodiment 2

[0056] Example 2: Electromagnetic semi-continuous casting of 6063 hollow ingot

[0057] The composition of 6063 alloy is listed in the following table:

[0058] 6063 alloy composition (wt%)

[0059] Si Mg Cu mn Fe Al 0.2～0.6 0.45～0.9 0.1 0.10 0.35 margin

[0060] Equipment conditions: the crystallizer is Φ315mm, the mandrel is Φ270mm, the height is 50mm, and the taper is 8 o ;

[0061] Electromagnetic field conditions: the relative position between the coil center and the liquid surface is 80mm, the magnetically conductive part of the mandrel outlet pipe is 10mm higher than the liquid surface, the electromagnetic field frequency is 20Hz, and the electromagnetic field strength is 40,000 ampere-turns;

[0062] Casting conditions: pouring temperature 800°C, casting speed 130mm / min; cooling water flow rate, crystallizer 140l / (min m), mandrel 60 l / (min m); the root of the liquid cavity is 15mm lower than the outlet of the mandrel;

[0063] Ingot...

Embodiment 3

[0065] Example 3: 7075 hollow ingot electromagnetic semi-continuous casting

[0066] The composition of 7075 alloy is listed in the following table:

[0067] 7075 alloy composition (wt%)

[0068] Zn Mg Cu Cr mn Fe Si Al 5.1～6.1 2.1～2.9 1.2～2.0 0.18～0.28 0.30 0.5 0.5 margin

[0069] Equipment conditions: the crystallizer is Φ395mm, the mandrel is Φ300mm, the height is 70mm, and the taper is 30 o ;

[0070] Electromagnetic field conditions: the relative position between the center of the coil and the liquid surface is 80mm, the magnetically conductive part of the mandrel outlet pipe is 20mm higher than the liquid surface, the frequency of the electromagnetic field is 5Hz, and the strength of the electromagnetic field is 50,000 ampere-turns;

[0071] Casting conditions: pouring temperature 710°C, casting speed 50mm / min; cooling water flow rate, crystallizer 50 l / (min m), core mold 10 l / (min m); the root of the liquid cavity is 30mm lower t...

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Abstract

The invention relates to the technical field of aluminum alloys, in particular to equipment for producing an aluminum alloy hollow casting ingot and a method of the equipment. The equipment for producing the aluminum alloy hollow casting ingot comprises a core die, a crystallizer, a bracket and a dummy ingot, wherein the core die is positioned at the center of the crystallizer and is concentric with the crystallizer; the bracket arranged on the crystallizer is used for supporting the core die; the dummy ingot is arranged at the lower part of the core die; a space between the core die and the crystallizer is a die cavity; the core die is designed into a taper with a large upper part and a small lower part; and the size of the taper is 1-30 degrees; a cooling system and a lubricating system are arranged in the core die; a coil is arranged in a water chamber of an aluminum sleeve of the crystallizer; and a shunt and a stop block are arranged on the crystallizer. According to the equipment for producing the aluminum alloy hollow casting ingot and the method for the equipment disclosed by the invention, a friction force between the casting ingot and the die core in the hollow casting process of the aluminum alloy is reduced and the core locking and breakout are avoided.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a device for producing aluminum alloy hollow ingots and a method for using the same. Background technique [0002] Aluminum alloy pipes are widely used in electric power, construction and other industries. There are two main production methods: [0003] 1. Casting produces solid ingots, and pipes are produced by rolling or extrusion, but such a production process has many procedures and low metal utilization; [0004] 2. Casting produces hollow ingots, and pipes are obtained by extrusion, which has fewer process steps and high metal utilization. [0005] Therefore, casting and producing hollow ingots is the preferred process for producing aluminum alloy pipes. At present, the main method of producing aluminum alloy hollow ingots is semi-continuous casting. Semi-continuous casting equipment usually consists of core mold, crystallizer and dummy ingot. At the beginning o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/04
Inventor 张海涛崔建忠秦克
Owner NORTHEASTERN UNIV
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