The production method of spray casting is characterized in that: in a short period of time, the molten metal liquid is sprayed into fine particles (10-500 μ m) through the atomization device, and the spray casting is piled on the predetermined deposition plate.
The outstanding feature of spray casting process is the rapid cooling, solidification and atomization of molten metal, which makes the supersaturated phase in the molten metal fine and evenly dispersed, and overcomes the phenomenon of micro segregation and coarse arrangement caused by slow cooling rate in traditional casting process. In the spray casting process, the metal liquid is directly formed into solid coarse embryo, which overcomes the problems of the complex multi-step processing procedures and the poor density arrangement and the severe powder oxidation in the powder metallurgy process, making the spray casting data have lower porosity and better performance than the powder metallurgy data.
There are many advantages of spray casting, such as: high stacking rate (generally 0.25-1.7kg / s); complex shape, which can reduce the processing process; diversified distribution of alloy, unrestricted composition; high density of rough embryo compared with powder metallurgy, low oxide content, etc.
In the spray casting process, the liquid metal can cool and solidify very quickly and form solid shape, which makes the micro segregation problem in the traditional casting process and the oxidation defect in the powder metallurgy process overcome, and shows excellent data characteristics.
Spray casting process is a new type of aluminum alloy forming method, which is a good choice for building materials, auto parts, and composite materials used in nuclear power plants.