Sodium Silicate Process is the casting process of less cutting or no cutting,it's the best one in investment casting;The made castings of the sodium silicate process reach high dimension tolerance and high surface roughness,moreover, the products of the more complex,high temperature and hard machining can be casted by sodium silicate process.
If the shape is common and the size isn't big,and the tolerance isn't tight,it prefers to choose only machining process(choose the material Q235) or choose the lost wax process to cast,then machining.
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