Stainless steel precision casting performance is worse than cast iron, its melting point is higher, liquid steel easy oxidation, poor liquidity of molten steel, shrinkage, stainless steel precision casting is suitable for all types of casting, all kinds of alloys. We all in the stainless steel precision casting, you know we all in the stainless steel precision casting, it has what advantages and disadvantages?
1, due to the shrinkage of stainless steel precision casting is much more than cast iron, in order to prevent the casting shrinkage cavity, shrinkage defects, in the casting process are mostly riser and, cold iron and subsidies and other measures, in order to achieve the sequence of solidification.
2. Due to the poor fluidity of liquid steel, the wall thickness of cast steel should not be less than 8mm in order to prevent cold insulation and insufficient pouring.
Use dry casting or hot casting; Properly increasing the pouring temperature, generally 1520° ~ 1600 ° C, because of the high pouring temperature, the superheat of molten steel is large, the liquid time is long, the fluidity can be improved. But too high temperature will cause defects such as coarse grain, hot crack, porosity and sand sticking.
Stainless steel precision casting has advantages, but also has disadvantages, should make its wall thickness uniform, avoid sharp Angle and right Angle structure, add sawdust in the mold sand, add coke in the core and the use of hollow core and oil sand core to improve the sand or core concession and permeability.