The Application and Development of Magnesium Alloy Casting
Abstract
Magnesium alloy is a kind of light metal material with high specific strength, specific stiffness, excellent damping characteristics and corrosion resistance. With its excellent performance, magnesium alloy gradually enters the casting field and is widely used in automotive, aerospace, electronics and other fields. This article introduces the application of magnesium alloy casting and the development of technology. In terms of application, the automotive, aerospace, electronics and other industries are discussed. In terms of technology, the low pressure casting technology of magnesium alloy, the high pressure casting technology of magnesium alloy components, the rheo-die casting technology of magnesium alloy, the squeeze casting technology of magnesium alloy, the semi-solid metal casting technology of magnesium alloy, the metallurgical bond technology of magnesium alloy, and the rapid solidification technology of magnesium alloy thin-walled components are introduced.
Keywords: Magnesium alloy casting; application; development
1 Introduction
Magnesium alloy has the advantages of small specific gravity, good ductility, good castability and processability, good corrosion resistance and excellent electromagnetic shielding properties which make it the lightest structural material in all metal materials. In view of the characteristics of magnesium alloy and its application prospects, magnesium alloy has gradually entered the casting field and is widely used in automotive, aerospace, electronics and other fields.
2 Application
2.1 Automotive
Magnesium alloy has been used to make parts for automobiles, such as engine side plates, oil pan covers, flywheels, clutches, shift cams, air conditioning system compressors and seats for automobiles. Due to the light weight of magnesium alloy, it saves power for driving, reduces gasoline consumption and reduces the pollution of exhaust gas to the environment.
2.2 Aerospace
With the continuous progress of aerospace materials, magnesium alloy, due to its light weight, good formability and mechanical properties, has been widely used in aviation engines, landing gear, cabin housing, regulating rods and other parts. Especially for high-speed long-range aircraft, the weight loss and performance improvement of magnesium alloys are particularly important.
2.3 Electronics
With the development of electronic industry, magnesium alloy components are widely used in electronic communication equipment, aviation and equipment, laptops and other electronic products, such as computer housing and other components.
3 Technology Development
3.1 Low Pressure Casting Technology
Low pressure casting technology has the advantages of simple structure and low cost and is widely used in the field of magnesium alloy casting. It can be used to make complex thin walled components with complex shapes, thin wall thickness and high dimensional accuracy.
3.2 High Pressure Casting Technology
High pressure casting technology is a kind of precise magnesium alloy casting process technology. This technology is suitable for making thin walled and precise components, such as steering wheel hub, hub, brake disc frame, etc., which has the advantages of high strength, impact resistance and energy absorption.
3.3 Rheo-die Casting Technology
Rheo-die casting is a liquid metal semi-solid forming process, which is a combination of near-solid phase forming and traditional die casting. It is especially suitable for complex components with rib structure, good surface finish and high processing efficiency.
3.4 Squeeze Casting Technology
Squeeze casting technology is a new casting process combining plaster mould and die casting. It not only maintains the high production efficiency of die casting, but also improves the mechanical properties of magnesium alloy components, such as strength and plasticity.
3.5 Semi-solid Metal Casting Technology
Semi-solid metal casting technology is a kind of casting technology which uses the characteristics of semi-solid formed in the microstructure of magnesium alloy and exploits the perfect combination of low casting temperature and high fluidity to realize the near-net shape and near-net size casting of components.
3.6 Metallurgical Bond Technology
Metallurgical bond technology is a new kind of magnesium alloy casting process which combines traditional casting and welding technology. Its characteristics are that the welding is implemented between the cup melting material and the components to be welded, ensuring high operating temperature and melting of the entire components and uniform temperatures.
3.7 Rapid Solidification Technology
Rapid solidification technology is a metal forming technology suitable for making thin-walled components with complex shapes. It is an effective manufacturing method for magnesium alloy thin-walled components with good metal homogeneity, high density, low porosity and high precision.
4 Conclusion
In order to meet the accelerated development of the automotive and aerospace industries, it is necessary to reduce the weight of components. Running at the forefront of lightweight materials, magnesium alloy will be widely used in automotive, aerospace, electronics and other fields in the near future. Therefore, the development of magnesium alloy casting technology needs to be further strengthened.
References
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