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Credibility ,The liquid shrinkage and shrinkage of the alloy in the production of alloy flanges are reduced, which is usually expressed by volume shrinkage, which is the basic reason of the shrinkage porosity and shrinkage defects of castings. Although the solid shrinkage of the alloy is also the volume change, it only causes the change of the external dimension of the casting. Solid shrinkage is the root cause of internal stress, deformation and crack of casting.
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