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Due to the poor fluidity of the molten steel in stainless steel casting, in order to avoid cold shuts and lack of pouring in the steel castings, the wall thickness of the steel castings should not be less than 8mm; Select dry casting or hot casting; Properly increasing the pouring temperature, usually between 1520 ° C and 1600 ° C. Due to the high pouring temperature, the superheat of molten steel is high, and the liquid state is maintained for a long time, the fluidity can be improved. However, if the pouring temperature is too high, it can cause defects such as coarse grain size, hot cracking, porosity, and sand sticking.
Therefore, for small, thin-walled, and irregularly shaped precision castings, the pouring temperature is approximately the melting point temperature of steel+150 ℃; The structure of the pouring system should be as simple as possible, and the cross-sectional size should be larger than that of cast iron; The pouring temperature of large, thick walled castings is about 100 ℃ higher than their melting point.
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