Development Trend of Heavy Section Ductile
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Key Words：Heavy section； Ductile cast iron； Yttriumbased； Nodulizing agent； Nodulization fading
Abstract：The development trend of ductile cast iron is heavy section casting. The process and mechanism of nodulization fading is summarized. The properties and the key in application of ytttiumbased nodulizing agent in antidegeneration of spheroidal.
