How to avoid uneven quality of precision castings

Methods to avoid uneven quality of precision castings are as follows:

Strictly control the quality of casting raw materials. If the quality of metal charge, refractory materials, fuels, solvents and other materials does not meet the standards, it will cause defects such as slag inclusions, sand sticking, pores and pinholes in the castings, affecting the appearance and internal quality of the castings.

Develop reasonable process operation procedures. Based on the structure, weight, size of the casting, the characteristics of the casting alloy, and the production conditions, select the appropriate parting surface and shape, core making method, and reasonably set up the casting bars, chillers, risers, and gating systems. At the same time, it is also necessary to improve the technical level of workers to ensure that the process is correctly implemented.

When designing castings, in addition to determining the size and geometry of the castings based on the working conditions of the castings and the properties of the metal materials, the rationality of the design also needs to be considered from the characteristics of the casting alloy and casting process.