What are the advantages and limitations of centrifugal casting?
Limitations：(1) cylindrical parts cast in the inner hole of the free surface roughness, size error, poor quality, there are many pores and slag, thus increasing the machining allowance, but not suitable for casting is easy to produce gravity segregation of alloy and aluminum magnesium alloy.(2- metal type manufacturing costs high, long cycle, is not suitable for single room, small batch production.(3) it is not suitable for the manufacture of complex shapes, thin wall and large castings.
The liquid alloy is poured into a high speed rotating mould, filling the mold and crystallizing the liquid metal under centrifugal force. The casting method is called centrifugal casting.Advantages: (1) the use of free surface cylinder, forming circular casting, can save core and pouring system, save labor, save material, reduce casting cost.(2) the gas and slag in liquid metal move out of the casting cavity under the action of centrifugal force, so there are few defects such as shrinkage, porosity, porosity and slag inclusion in the casting.(3) it is easy to manufacture bimetal castings(4) the filling ability of molten metal can be improved, and the casting structure is compact.
The characteristics of centrifugal casting is the liquid metal under the action of centrifugal force of filling and solidification of metal, good feeding effect, the outer shell of the casting microstructure, non-metallic inclusions, good mechanical properties; no molding and core making, saves investment related materials and equipment. The casting hollow casting needs no riser, and the utilization ratio of the metal can be greatly improved. Therefore, centrifugal casting is a material saving, energy saving and cost-effective process for certain shapes of castings, but special attention should be paid to effective safety measures. Castings without porosity, porosity and slag inclusion can be obtained by centrifugal casting, and the microstructure is fine and the mechanical properties are good. When casting a round hollow part, the core can be omitted. In addition, centrifugal casting does not require a gating system and reduces metal consumption. But the centrifugal casting of cylinder parts cast in the inner hole of the free surface roughness, size error, poor quality, there are many pores and slag, thus increasing the machining allowance, but not suitable for casting is easy to produce gravity segregation of alloy and aluminum magnesium alloy.
