The Causes Of Wrinkles Formed On Precision Castings Produced Surface By Lost Foam

For iron castings, surface wrinkles are the most common defect. Because free carbon does not easily penetrate into the surface of the casting, but is deposited on the surface of precision casting and molds. During this pouring, the ES type is in contact with the molten metal and decomposes into three components: gaseous, liquid and P-mode solid.

The gas phase is mainly composed of CO, CO: 2, H, methane, styrene and its derivatives; the liquid phase is mainly composed of liquid hydrocarbon groups such as benzene, toluene, styrene and glassy polystyrene; the solid phase is mainly composed of polystyrene thermal Decomposition of the bright carbon and coke residue group formed.