Advantages And Disadvantages Of Centrifugal Casting
Centrifugal casting is the main production method for cast iron pipes, cylinder liners, copper bushings and bimetal bearings. The maximum weight of castings can reach several tens of tons, and it can also produce heat-resistant steel roller and special steel seamless pipe blanks.
Its advantages are as follows:
1) When producing cylindrical castings from free surfaces, cores and gating systems can be eliminated, reducing costs.
2) The castings are solidified sequentially from the outside to the inside by the centrifugal force, and the gas and the slag are excluded by the specific gravity moving toward the inner cavity (free surface). The castings are densely organized, and there are few shrinkage holes, pores, and slag inclusions.
3) Strong filling ability, easy to produce alloys and thin-walled parts with poor fluidity.
4) It is convenient to manufacture bimetal castings. For example, in the manufacture of plain bearings, a thin layer of copper lining can be cast on the steel sleeve.
The disadvantages are:
1) The inner hole formed by the free surface has a large dimensional deviation and a rough inner surface.
2) It is not suitable for casting alloys and light alloys (not dense) with large specific gravity segregation, such as lead bronze, aluminum alloy, magnesium alloy, etc. In addition, the equipment investment is large, not suitable for single-piece, small batch production.
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