| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cast iron-made molded product having good workability even in the case of performing a casting work by using a metallic mold, such as centrifugal casting method. SOLUTION: In the case of performing the casting work with the centrifugal casting method, cooling rate when the cast iron temperature is passed through an A1 transformation point by lowering the temperature of a cylindrical sleeve SV (the cast iron-made molded product), is set to 30-200 deg.C/min. For making the cooling rate into this range, e.g. at the point of time when the molten metal temperature is lowered and reached to the lower temperature than an eutectic point, the molded cylindrical sleeve SV is preferably taken out from the cylindrical metallic mold 16.
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