Semi-solid die casting is a manufacturing process that leverages the principles of shear-thinning of semi-solid slurry materials, subjecting them to a shear stress field during the filling process to enhance their fillability and achieve impeccable surface quality of the castings.
Key Features of Magnesium Alloy Semi-Solid Die Casting:
1. Lightweight:
Magnesium alloy has a density of 1.83, which is about 2/3 that of aluminum and 1/4 that of iron. It is one of the lightest practical metals, making it ideal for a wide range of lightweight products. Lightweight products save energy and reduce carbon emissions.
2. Excellent Strength:
Despite being denser than plastic materials, magnesium alloys exhibit superior bending elasticity and tensile strength. This enables the production of thin-walled products that are lightweight yet strong.
3. Good Heat Dissipation:
Magnesium alloys have excellent heat conduction properties with a thermal conductivity of 150W/mk, effectively dissipating heat within machines and devices.
4. Electromagnetic Shielding:
Magnesium alloys offer strong electromagnetic interference shielding capabilities, making them suitable for products requiring control of electromagnetic interference within specified ranges.
5. Recyclability:
Magnesium alloys are easy to recycle and can be re-melted to create new materials. The energy required for recycling magnesium alloys is only 4% of that needed to produce new raw materials, increasing the use of recycled materials and promoting environmental sustainability.
6. Vibration Damping:
Magnesium alloys have vibration-damping properties, reducing noise and extending the lifespan of various devices.
7. Dimensional Stability:
Magnesium alloy products maintain their original dimensions over time and with temperature fluctuations.
8. Impact Resistance:
High impact resistance prevents deformation from sudden impacts.
9. Machinability:
Magnesium alloys are easy to machine, resulting in significant time and cost savings during the manufacturing process.
Advantages of Magnesium Alloy Semi-Solid Die Casting:
1. Easy Alloy Replacement:
Using magnesium alloy scraps as raw materials eliminates the need for a melting furnace, making it easy to switch between different magnesium alloy types for casting.
2. Excellent Quality:
High injection speed and pressure result in superior surface quality, allowing for the production of thin-walled, high-precision products.
3. Precise Dimensions and Mechanical Properties:
Magnesium alloy’s lower melting temperature compared to conventional die casting results in improved dimensional accuracy and mechanical properties.
4. Improved Density:
The process ensures that the magnesium alloy introduced into the casting machine remains isolated from the air, leading to a cleaner and safer operational environment compared to traditional die casting.
5. Environmentally Friendly:
Semi-solid die casting eliminates the need for SF6 protective gas, making it an eco-friendly manufacturing process that contributes to the protection of the Earth’s environment.
