The Principle of Materials Selection in Casting Process
Casting is a process of forming and producing various articles by pouring molten metal into pre-made moulds. It is suitable for making complex and massive objects with higher precision request. During the casting process, several raw materials need to be selected and supplied, most of which are related to the characteristics of castings quality, such as casting alloy, moulding material, heat treatment media, etc. Here are the main principles of materials selection in the casting process:
1. The casting alloy should be selected as per the mechanical strength and working temperature of the casting. The mechanical strength and working temperature of the castings should match with the casting alloy.If the casting temperature is high, the casting alloy should have enough strength to resist the corrosion.
2. The moulding material should be selected according to the complexity and shape of the casting.For different types of casting, the moulding material should be varied. The moulding material has a certain fluidity, and should be selected with the flowing nature of the liquid metal and its ability to fill in the mould.
3. Heat treatment media should also be selected according to the casting requirement. Heat treatment media can strengthen the mechanical strength of the metal, improve the hardness and ductility of the casting, remove internal stress, and develop alloys to meet the casting requirements.
4. Refractory material selection should also be based on the casting temperature.The refractory material should be able to withstand high temperatures and melting of the casting alloy, and the shape and size of the castings should also be considered.
These are the main principles of material selection in the casting process.By selecting the appropriate materials, it can ensure the correct casting, stability and quality of the casting. In order to achieve the goal of casting products with good performance, it is necessary to make the most suitable selection of raw materials in the concept of integrated casting.
In conclusion, To choose the right material for casting process, the basic principles include the right casting alloy, molding material, heat treatment media and refractory materials should be taken into consideration, as well as the temperature and complexity of the casting. Only by making the most suitable selection from the concept of integrated casting, can the quality of the casting products be guaranteed.
