| 摘要 |
PURPOSE:To obtain the titled mold having superior characteristics in three points of thermal conductivity, vibration damping capacity and strength by contg. prescribed ratios of C, Si, Mn, S and >= one kind among Mg, Cs, Ce respectively and the balance Fe, and composing of vermicular cast iron having catapillar graphite after the casting. CONSTITUTION:The mold for centrifugal casting composed of the cast iron contg. by weight 2.5-4.0% C, 2.0-3.5% Si, 0.4-1.5% Mn, <=0.030% S and >=one kind among 0.010-0.02% Mg, 0.003-0.020% Ca, 0.010-0.02% Ce and the balance Fe is presented. The cast iron in this case is vermicular cast iron having caterpillar graphite after the casting. Since the mold strength of this invention is remarkably higher compared with usual common cast iron material quality, danger of mold cracking accident, etc. is decreased and service life of the mold is extended remarkably.
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