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Device and process for internal and external cooling continuous casting of magnesium alloy and aluminum alloy ingot blanks

A technology for aluminum alloy ingots and magnesium alloys, which is applied in the field of continuous casting equipment for magnesium alloys and aluminum alloy ingots, can solve the problems of low ingot yield, coarse internal structure, and great difference in structure between the center and edge of the ingot. The effect of improving the cooling rate in the middle and uniform cooling

Inactive Publication Date: 2012-05-02
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ingots, especially high alloyed and large-sized ingots, have a coarse internal structure, a large difference between the center and edge of the ingot, serious macro segregation, and easy to produce porosity and pores, so the yield of the ingot is low , seriously restricting the application and development of aluminum and magnesium alloy products

Method used

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  • Device and process for internal and external cooling continuous casting of magnesium alloy and aluminum alloy ingot blanks
  • Device and process for internal and external cooling continuous casting of magnesium alloy and aluminum alloy ingot blanks
  • Device and process for internal and external cooling continuous casting of magnesium alloy and aluminum alloy ingot blanks

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0030] Utilizing the above-mentioned equipment, a new ingot casting method of magnesium alloy or aluminum alloy can be formed. The specific implementation method is as follows:

[0031] (1) After the magnesium alloy or aluminum alloy is smelted and purified, oil is supplied to the oil circuit lubrication system of the crystallizer 1, and water is supplied to the water inlet pipe 37 of the crystallizer 1 and the internal cooling device;

[0032] (2) When the temperature of the metal melt magnesium alloy or aluminum alloy drops to 30-40°C higher than the liquidus temperature, the magnesium alloy is driven into the diversion steel pipe 29 by the mechanical pump, and the aluminum alloy enters the diversion pipe through the chute 31 30, then enter the trapezoidal groove 28 of the diversion plate 8, flow into the annular groove of the diversion plate 8 through the diversion cone 27, and then the melt enters the inner cavity of the crystallizer 1 through the inner hole 18 of the dive...

Embodiment 1

[0043] Magnesium alloy AZ80, diameter 320mm.

[0044] After pure magnesium is melted in a resistance furnace, Al, Zn, Mn and other alloy elements are added, heated to 720°C, refined with argon, covered with solvent, and left to stand for 20 minutes. Open the oil lubricating system of the crystallizer 1 to supply oil to it, and supply water to the crystallizer 1 and the inner cooling head water inlet pipe 37, and start casting when the temperature of the magnesium alloy melt drops to 700°C. Turn on the power supply of the magnetic field, and the melt is driven into the diversion steel pipe 29 through the mechanical pump, and enters the diverter plate 8; adjust the T-shaped handle 2, adjust the height of the liquid level, and start casting after the liquid level is higher than the center line of the diversion hole 19 on the outer wall of the diverter plate machine, casting begins. Constantly adjust the T-shaped handle 2 during the casting process to ensure a stable liquid level...

Embodiment 2

[0054] 7050 aluminum alloy, diameter 420mm.

[0055] After the pure aluminum and Al-zirconium master alloy are melted in an intermediate frequency furnace, alloy elements such as Zn and Mg are added, heated to 750°C, refined with argon, covered with solvent, and left to stand for 30 minutes. Open the oil lubricating system of the crystallizer 1 to supply oil to it, open the valve, and supply water to the crystallizer 1 and the water inlet pipe 37 of the internal cooling head. The temperature of the aluminum alloy liquid drops to 725°C to start casting, the magnetic field power is turned on, the melt is introduced into the chute 31 , and enters the diverter plate 8 through the guide tube 30 . Wait until the liquid level of the aluminum alloy melt is higher than the centerline of the split hole 19 on the outer wall of the split disc, start the casting machine, and the casting starts. Constantly adjust the T-shaped handle 2 during the casting process to ensure that the liquid le...

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Abstract

The invention discloses continuous casting equipment and a continuous casting method for magnesium alloy and aluminum alloy ingot blanks. The continuous casting equipment comprises a mold and a dummy ingot block, a liquid level control lever, an internal cooling device, an oil way lubricating system and a split plate are further arranged in the continuous casting equipment, the internal cooling device comprises an internal cooling core pipe, an internal cooling head, a water inlet pipe, a sealing ring, a vibration head, an eccentric wheel, a variable-speed motor, a shell, a water outlet pipe,a spring and the like, the eccentric wheel is driven by the variable-speed motor, the upper end of the vibration head is connected with the eccentric wheel, the lower end of the vibration head and the upper end of the internal cooling head are fixedly connected into a whole and placed in a slide way defined by an upper plate and a lower plate, and the water inlet pipe is communicated with the internal cooling core pipe, an inner cavity of the internal cooling head and the water outlet pipe. When the continuous casting equipment for the magnesium alloy and aluminum alloy ingot blanks is operated, the internal cooling head of the internal cooling device is placed in the middle of a cast ingot to cool the center of the cast ingot, and accordingly, the quality of the center of the cast ingot is improved remarkably.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal alloy ingot casting, and in particular relates to continuous casting equipment and methods for magnesium alloy and aluminum alloy ingot blanks. Background technique [0002] Continuous or semi-continuous casting has become the main preparation method for metal and its alloy ingots since the metal ingots were directly sprayed on the surface, that is, the DC (Direct-Chill) casting process. Because the ingot is chilled, DC casting has the advantages of high productivity and fine ingot structure. The ideal internal structure of the ingot should have fine equiaxed crystals, no macro segregation, high solid solution of alloying elements in the crystal, good surface quality, consistent internal and external structure, and no defects such as casting cracks and porosity. In addition to the need to strictly control the alloy liquid composition and impurity content during smelting, casting cooling ...

Claims

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Application Information

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IPC IPC(8): B22D11/14B22D11/055B22D11/103B22D11/07
Inventor 崔建忠乐启炽张志强
Owner NORTHEASTERN UNIV
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