Detailed process characteristics of stainless steel precision casting

H1. Stainless steel precision casting for use in the process of its mechanical properties is relatively high, mainly due to the melting point of the product is higher, stainless steel precision casting of easy oxidation of liquid steel, illiquid and contraction of the molten steel at run time, volume shrinkage rate of 10 ~ 14%.

H2. Stainless steel precision casting in order to effectively prevent the steel casting from the inadequate pouring, shrinkage cavity, shrinkage porosity, cold insulation, defects such as cracks and adhering sand, in the process of use must be more complicated than the cast iron craft measures.

H3. Stainless steel precision casting when use its shrinkage greatly exceed its cast iron, when use in order to prevent the castings. The shrinkage cavity and shrinkage defects, metropolitan in casting process using riser and chill and subsidy measures, so that you can achieve solidification sequence.

H4. Because of liquid steel in the stainless steel precision casting with poor liquidity, in the process of use in order to effectively prevent the steel casting cold-lap and shortage of casting, steel not less than 8 mm thick wall, gating system structure to simple and cross section size is bigger than cast iron.

H5. Stainless steel precision casting because of its high pouring temperature, the liquid steel superheat, liquid is needed in the process of using a long time, in the process of using its liquidity can get its improvement, but the water temperature is too high, can directly cause grain bulky, cracking and other defects.

H6. Stainless steel precision casting generally small, thin wall and complex shape casting, the pouring temperature is about steel melting point temperature of 150 degrees or so, with a thick wall and large castings pouring temperature than high melting point of 100 degrees or so.

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