Shunt device and casting system for magnesium alloy semi-continuous casting

A shunt device and magnesium alloy technology, which is applied in the field of semi-continuous casting shunt devices, can solve the problems of high probability of hot cracking

Active Publication Date: 2016-03-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the traditional flow splitting device, the magnesium alloy liquid is exposed to the air, and it is easier to produce oxide scales. As the liquid flows, oxide inclusions are formed, and the alloy liquid flows into the crystallizer from different positions. Big

Method used

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  • Shunt device and casting system for magnesium alloy semi-continuous casting
  • Shunt device and casting system for magnesium alloy semi-continuous casting
  • Shunt device and casting system for magnesium alloy semi-continuous casting

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preparation example Construction

[0044] In a specific embodiment of the present invention, the preparation method of the zirconia matrix porous ring 5 preferably includes the following steps:

[0045] Mixing zirconia and a binder, followed by preforming and sintering in sequence to obtain a zirconia matrix porous ring;

[0046] The binders include polystyrene, sodium hyaluronate, and polymethylmethacrylate.

[0047] In the present invention, the particle size of the zirconia is preferably 1.5-6 mm; the present invention has no special limitation on the source of the zirconia, and the above-mentioned zirconia well known to those skilled in the art can be used. sell goods. In the present invention, the particle size of the zirconia has a certain influence on the average diameter of the pores in the porous ring 5 of the zirconia matrix. The larger the particle size of the zirconia, the larger the average diameter of the pores in the formed porous ring.

[0048]In the present invention, the binder includes poly...

Embodiment 1

[0073] Prepare a high temperature resistant adhesive according to the composition of the following volume ratio: polystyrene: 30%; sodium hyaluronate: 40%; polymethyl methacrylate: 30%, mix 2mm zirconia ceramic particles with the above adhesive , the volume of zirconia ceramic particles is 50%, stirring in a mixer for 15 minutes, placing the mixed mixture in a mold and cold pressing to form a ring blank, the outer diameter of the ring blank is 120 mm, and the thickness is 35 mm. The height is 60mm, and the dried billet is sintered in a high-temperature furnace. The sintering process is: 300°C for 20 hours; 1550°C for 5 hours, and then vibrate and clean the porous ring. The average hole diameter of the zirconia matrix porous ring is 6mm. , blow dry the porous ring after cleaning, and install the upper and lower cover discs. Place the diverter device in accordance with the figure 1 As shown in the assembly, use a crystallizer with a diameter of 600mm to cast MB26 magnesium allo...

Embodiment 2

[0075]Prepare a high temperature resistant adhesive according to the composition of the following volume ratio: polystyrene: 35%; sodium hyaluronate: 30%; polymethyl methacrylate: 35%, mix 6mm zirconia ceramic particles with the above adhesive , the volume of zirconia ceramic particles is 55%, stirring in a mixer for 15 minutes, placing the mixed mixture in a mold and cold pressing to form a ring blank, the outer diameter of the ring blank is 150 mm, and the thickness is 20 mm. The height is 35mm; the dried ring blank is sintered in a high-temperature furnace. The sintering process is: 300°C for 20 hours; 1550°C for 5 hours, and then vibrate and clean the zirconia matrix porous ring. The average hole diameter is 10mm, the zirconia matrix porous ring is cleaned and dried, and the upper cover and the lower cover disc are installed; the shunt device is installed according to figure 1 Assembled as shown, using a crystallizer with a diameter of 500mm to cast the Mg-10Gd-3Y-0.5Zr ma...

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Abstract

The invention provides a shunt device and a casting system for magnesium alloy semi-continuous casting. The shunt device comprises a zirconium oxide substrate porous ring, an upper cap and a lower cap, wherein the upper cap and a lower cap are arranged at the two ends of the zirconium oxide substrate porous ring respectively. A cavity is formed among the zirconium oxide substrate porous ring, the upper cap and the lower cap. The upper cap is provided with a hole allowing magnesium alloy liquid to enter the cavity through the hole. The lower cap is provided with a spure spreader in the cavity. The hole and the spure spreader are arranged coaxially. Holes of the zirconium oxide substrate porous ring comprise closed holes and communicating holes. The average diameter of the holes of the zirconium oxide substrate porous ring is 5-20 mm. The total volume of channels of the communicating holes accounts for 20%-50% of the volume of the zirconium oxide substrate porous ring. The shunt device is applied to a semi-continuous casting system, the magnesium alloy liquid flows out of the holes of the side wall in a permeating mode through the winding holes in the side wall of the porous ring, and the probability of composition segregation is fully lowered, so that the hot tearing phenomenon is reduced.

Description

technical field [0001] The invention relates to a splitter device for semi-continuous casting, in particular to a splitter device and a casting system for semi-continuous casting of magnesium alloys. Background technique [0002] With the rapid development of my country's economy, more and more magnesium alloy materials are used in high-tech manufacturing fields such as train shells, spacecraft weight-reducing parts, and special machinery weight-reducing parts. Except for a few of these parts that can be directly formed by casting technology, most of them need to be realized by forging and rolling processes. Therefore, the preparation of large-size magnesium alloy ingots with excellent performance becomes the key. At present, the preparation of large-size magnesium alloy ingots in non-ferrous alloys mostly adopts a semi-continuous casting process: first, the alloy liquid flows out from the high-temperature furnace, and flows into the splitter device through the pipetting de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/103
CPCB22D11/103
Inventor 张洪杰程丽任佟立波邱鑫
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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