Same-level multi-strand continuous casting device and method for magnesium alloy

A multi-stream continuous casting and magnesium alloy technology, which is applied in the field of magnesium alloy casting devices, can solve the problems of split casting that cannot be exposed in the air, is easy to react with magnesium alloy liquid and burn, and magnesium alloy is easy to oxidize, so as to avoid liquid Undulating surface, saving dosage, uniform and small grain size

Active Publication Date: 2016-02-24
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first is shunting. Since multi-strand casting must have multiple crystallizers, the magnesium alloy melt flows into the shunt box (pan), and then is distributed to each crystallizer, cooled and solidified into an ingot in the mold, and the aluminum alloy melt It can be exposed in the air, and the surface oxide film can form a good protection, but the magnesium alloy is easy to oxidize and flammable, so it cannot be exposed to the air for split casting; secondly, the split box of the magnesium alloy, the hot top of the crystallizer, etc. must be used Insulating refractory materials, although the refractory materials used in aluminum alloy casting have good strength and thermal insulation, but the materials contain alumina, and alumina is easy to react with magnesium alloy liquid and burn

Method used

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  • Same-level multi-strand continuous casting device and method for magnesium alloy
  • Same-level multi-strand continuous casting device and method for magnesium alloy
  • Same-level multi-strand continuous casting device and method for magnesium alloy

Examples

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Effect test

Embodiment 1

[0040] A magnesium alloy same-level multi-stream continuous casting device, such as figure 1 and figure 2As shown, 1. hot top crystallizer, 2. splitter box, 3. diversion tube, 4. metal filter, 5. splitter tube, 6. heating jacket covering the splitter tube surface, 7. fixing bolts, 8. Water tank, 9, protective gas pipe, 10, dummy block, 11, cooling water inlet pipe.

[0041] The device includes a diversion tube 3, a diversion box 2, a plurality of hot top crystallizers 1, a diversion tube 5, a protective gas pipe 9, a water tank 8 and a dummy block 10, and the diversion tube 3 passes through the conduit hole at the top of the diversion box 2 Insert into the shunt box, the shunt box 2 and multiple hot top crystallizers 1 are fixed on the water tank 8 by bolts 7, the connection between the shunt box 2 and the multiple hot top crystallizers 1 is realized through the shunt pipe 5, and the protective gas pipe 9 is connected Shunt box 2 and hot top crystallizer 1, dummy block 10 i...

Embodiment 2

[0057] A magnesium alloy multi-strand continuous casting device at the same level, the device structure is the same as that of embodiment 1, the difference is that the number of hot top crystallizers is 4, and the mesh number of the stainless steel wire mesh of the flow screen is 100 mesh.

[0058] The method for carrying out the same level multi-strand continuous casting of magnesium alloy by using the device includes the following process steps:

[0059] (1) Put the dummy block into the hot top crystallizer for alignment, turn on the heating jacket and heat it to 600~700°C, put cooling water into the water tank, and put high-purity carbon dioxide plus 0.5% six into the protective gas pipe Sulfur fluoride, carbon dioxide pressure is 0.012MPa;

[0060] (2) The smelted and purified magnesium alloy melt with a temperature of 700°C flows into the shunt box through the diversion pipe, and then flows into each hot top crystallizer through the shunt pipe, until the liquid level in t...

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Abstract

The invention provides a same-level multi-strand continuous casting device and method for magnesium alloy. The device comprises a flow guide pipe, a flow diversion box, hot top crystallizers, a flow diversion pipe, a shield gas pipe, a water tank and dummy ingots. The flow guide pipe is inserted in the flow diversion box. The flow diversion box and the hot top crystallizers are fixed to the water tank. The flow diversion box and the hot top crystallizers are connected through the flow diversion pipe. The shield gas pipe is connected with the flow diversion box and the hot top crystallizers. The dummy ingots are arranged under the top hot crystallizers. The method includes the technical steps that firstly, the dummy ingots stretch into the hot top crystallizers to be aligned, a heating sleeve is electrified, cooling water is led into the water tank, and shield gas is led into the shield gas pipe; secondly, a magnesium alloy melt is introduced into the device, a casting machine is started at a preset speed, and casting is conducted; and thirdly, when the preset cast ingot length is nearly reached, casting is stopped. Magnesium cast ingots manufactured through the same-level multi-strand continuous casting device and method for the magnesium alloy are smooth in surface, free of cracks, even in internal texture and even and fine in grain size.

Description

technical field [0001] The invention relates to a magnesium alloy casting device and method, in particular to a magnesium alloy same-level multi-stream continuous casting device and method. Background technique [0002] The multi-strand, same-level continuous casting method is widely used in aluminum alloy casting. This method has high production efficiency and output, and has become the main preparation method for small and medium-sized aluminum alloy ingots. Because magnesium alloy is relatively active, easy to oxidize and burn, and almost all existing refractory materials can react with magnesium alloy melt, and magnesium alloy melt must be covered with gas or molten salt, so far there is no magnesium alloy that can be industrialized Multi-strand same-level continuous casting technology. [0003] In recent years, magnesium alloy continuous casting technology has developed rapidly, and many new methods have emerged: Patent CN03133390.7 applies a low-frequency magnetic fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/14
CPCB22D11/143
Inventor 崔建忠乐启炽张志强
Owner NORTHEASTERN UNIV
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