| 摘要 |
PROBLEM TO BE SOLVED: To provide centrifugal casting method for high speed steel cast iron, which prevents the growth of casting defects or annual-ringlike segregation which involves an oxide or solidified shell. SOLUTION: This centrifugal casting method is characterized in that all the surface of a liquid metal 16 in a tundish 11, is covered by flux 18 to shutoff the liquid metal from air, and that the liquid metal is taken out from a liquid metal injection hole 12 which is installed at the bottom of the tundish 11, passing through a hollowlike liquid metal passage which is formed at a block 20, thereby being fed into the inside of a die in substantially air shutoff condition.
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