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Casting process of stainless steel pump castings and internal and external quality requirements
- Jul 25, 2018 -

In the process of casting process, the stainless steel pump castings should follow the principle of high temperature tapping and low temperature casting, so that the molten metal temperature can be effectively improved to facilitate the complete melting of the inclusions and the slag floating. Slag and degassing, reducing slag and porosity defects in machine tool castings.

The stainless steel pump castings effectively use the lower pouring temperature, which can help to reduce the gas solubility in the molten metal to a certain extent, the liquid shrinkage amount and the baking of the high temperature molten metal on the cavity surface to avoid generation. Defects such as pores, sand and shrinkage. Therefore, a lower pouring temperature should be used as much as possible while ensuring that the mold cavity is filled. The process of injecting molten metal from a ladle into a mold is called casting. Improper pouring operations can cause defects in machine castings such as insufficient pouring, cold insulation, pores, shrinkage holes, and slag inclusions, and cause personal injury.

Stainless steel pump castings mainly include their intrinsic and extrinsic quality. In general, the appearance quality refers to the surface roughness, surface defects, dimensional deviation, shape deviation and weight deviation of the casting. The intrinsic quality mainly refers to the chemical composition of the casting. , physical properties, mechanical properties, metallographic structure and pores, cracks, inclusions, segregation, etc. present in the interior of the casting. The quality of use refers to the working durability of the casting under different conditions, including wear resistance, corrosion resistance and chilling resistance. Thermal, fatigue, shock absorption and other performance as well as machinability, weldability and other process properties.

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