Centrifugally cast tubes, esp. for abrasive processes - mfd. by sprink-ling heavy modifying powder onto surface of still soft smelt

摘要

Centrifugal casting of hollow metal objects, in which, while the metal is still liq., or at least doughy, in consistency, pulverulent or granular solids of a higher density than the melt are sprinkled internally, so as to penetrate under centrifugal force into the melt. The depth of penetration may be regulated.