Vacuum pressure casting machine for magnesium alloy

A vacuum pressure casting and vacuum pressure technology, which is applied in the field of casting equipment for high-quality magnesium alloy castings, can solve the problems of time-consuming, low productivity, unsafe production process, etc., and achieve stable process parameters, light oxidation degree, and good feeding effect Effect

Inactive Publication Date: 2005-01-26
李书伟 +2
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Problems solved by technology

[0004] Conventional low-pressure casting, crucible sealing and pressing methods have the following disadvantages: the addition of molten metal, the sealing and opening of the crucible and cleaning operations are quite troublesome and time-consuming; the crucible will "bulge" after repeated pressure, which greatly Reduce the service life of the crucible; for flammable metals such as magnesium alloy, "bulging belly" may cause serious magnesium leakage safety accidents, and the magnesium alloy liquid in the crucible leaks into the furnace cavity, usually causing a violent explosion
However, there are still some problems in the above technology. For example, due to the l

Method used

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  • Vacuum pressure casting machine for magnesium alloy

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[0022] The casing of the magnesium alloy vacuum pressure casting machine is welded with low-carbon steel plate, and it is designed, manufactured, installed, debugged and inspected according to the technical specifications of the pressure vessel, and a low vacuum seal is ensured.

[0023] The compressed gas used in the magnesium alloy vacuum pressure casting machine is dry compressed carbon dioxide gas, and the protective gas is sulfur hexafluoride. The refractory material of the holding furnace is magnesium oxide-based refractory to avoid accidental contact between magnesium alloy liquid and other types of refractory materials. A strong exothermic reaction caused an accident.

[0024] Magnesium alloy vacuum pressure casting machine is especially suitable for manufacturing cylindrical and large-size magnesium alloy shell castings. Generally, the shape is complicated, the thinnest wall is 2 mm, and the dimensional accuracy and density are required. Several main parameters of the mag...

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Abstract

The invention belongs to metal casting device. The magnesium alloy cast is complex, and the performance is bad. The invention is a magnesium alloy casting device which fills shape in vacuum state and solidifies them in various pressure state. It can realize the optimized casting process condition, it can be applied to produce each kind of large, complex, thin magnesium alloy casting piece with precise size and high thickness.

Description

Technical field: [0001] The invention belongs to metal casting equipment, in particular to casting equipment for producing various large, complex, thin-walled, high-quality magnesium alloy castings with strict requirements on dimensional accuracy and density. Background technique [0002] Reducing the structural weight of various machinery and vehicles is one of the main ways to save energy and protect the environment. Magnesium is the lightest structural metal material. Magnesium alloy is 37% lighter than aluminum alloy. Its specific strength and specific stiffness are second only to titanium alloy and alloy structural steel, but higher than aluminum alloy. Others, such as impact resistance and processing performance, can be The recycling performance is also better than that of aluminum alloy. Magnesium is rich in resources, easy to produce, 9% less energy in smelting than aluminum alloy, 8.5% less energy in melting and casting than aluminum alloy, die-casting mold life is...

Claims

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Application Information

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IPC IPC(8): B22D18/00B22D21/04
Inventor 李书伟黄育宏杨仲可
Owner 李书伟
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