| 摘要 |
PROBLEM TO BE SOLVED: To provide spheroidal graphite cast iron by which superior workability can be maintained while securing high fatigue strength in an as-cast state and raw-material costs can be reduced. SOLUTION: This spheroidal graphite cast iron can be obtained by combinedly adding 0.4 to 0.8 wt.% Cu and 0.5 to 1.0 wt.% Ni and also adding 0.003 to <0.010 wt.% Ca to a spheroidal graphite cast iron having a composition consisting of, by weight, 3.2 to 3.8% C, 2.0 to 2.8% Si,≤0.3% Mn,≤0.04% P, 0.02 to 0.06% Mg and the balance Fe. COPYRIGHT: (C)2005,JPO&NCIPI
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