What factors can affect the quality of castings?

Many factors influence the quality of castings, which can be analyzed from the following aspects:

1. The design and manufacturability of large castings: During the design process, in addition to determining the shape and size of the casting based on working conditions and the properties of the metal material, the rationality of the design must be considered from the perspectives of the casting material and casting process characteristics. This includes issues such as dimensional effects, solidification, shrinkage, and stress, in order to minimize defects such as component segregation, deformation, and cracking.
2. During processing, a reasonable casting process must be selected. This means choosing an appropriate parting surface, molding, and core-making method based on the structure, weight, and size of the casting, the selected material, and production conditions. This includes the proper placement of chills, risers, and gating systems to ensure the production of high-quality cast steel parts.
3. The quality of raw materials used. If the furnace charge, refractory materials, fuel, solvent, foundry sand, and coatings do not meet standards, defects such as porosity, pinholes, and slag inclusions will appear in the castings, directly affecting both the appearance and internal quality of the castings. In severe cases, this can even lead to the casting being scrapped.
4. Machining techniques and operations. To process castings, it is necessary to select a reasonable machining process, enhance the technical skills of the operators, and strictly regulate the process flow.