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What are the advantages and disadvantages of stainless steel precision casting?

Stainless steel precision casting performance is worse than cast iron, its melting point is higher, molten steel is easy to oxidize, molten steel has poor fluidity and shrinkage, stainless steel casting is suitable for casting of various types and various alloys. When we all worked on stainless steel precision casting, we all know what advantages and disadvantages do we have when we are casting stainless steel?

  • 1. Since the shrinkage of stainless steel precision casting greatly exceeds the cast iron, in order to prevent shrinkage and shrinkage defects of the casting, most of the casting process uses risers, cold irons and subsidies to achieve sequential solidification.
  • 2. Due to the poor fluidity of the molten steel, in order to prevent the cold separation and pouring of the steel castings, the wall thickness of the steel castings shall not be less than 8 mm;

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Dry casting or hot casting; suitable to increase the pouring temperature, generally 1520 ° ~ 1600 ° C, because the casting temperature is high, the molten steel has a high degree of superheat, long liquid retention time, fluidity can be improved. However, if the pouring temperature is too high, it will cause defects such as coarse crystal grains, hot cracks, pores and sand.

Stainless steel precision casting has advantages and disadvantages. It should be made to have uniform wall thickness, avoid sharp angle and right angle structure, add sawdust in molding sand, add coke in core and hollow core and oil sand core to improve. Sand or core repellent and breathable.