The first factor is the design process of steel casting.
When designing, determine the geometry and size of steel casting parts according to the metal working conditions and material properties. In addition, consider the design reasonable according to the characteristics of steel castings' processing such as obvious size effect and the solidification shrinkage, stress and other issues in order to avoid or reduce the casting segregation, deformation, cracking and other defects.
The second factor is that steel casting process must be reasonable.
According to the structure, weight and size of steel castings, cast alloy properties and production conditions, select the appropriate type face and style, making the core method, a reasonable set casting bars, cold iron, and riser and gating system. Then make sure that get quality steel castings.
The third one is the quality of raw materials used in steel casting.
If quality of metal charge, refractoriness, fuel, flux, modifier and casting sand, sand binder, paint and other materials are sub-standard, the steel castings will generate stoma, pinholes, slag, sticky sand and other defects, which affect the appearance and internal quality of steel castings.
The fourth factor is the reasonable process operation of steel castings.
Reasonable process will improve the skill level of workers and correctly implemented technical rules used.