by means of the contrast experiment,the effect of micro-chill produced by the white castiron shot containing nodularizing elements,with the addition of 10%,on the microstructure and propor-ties of the medel specimens of heavy section ductile iron is studied,The particular function of micro-chiller in improvlng solidification behavior of heavy section ductile iron is analysed.
本文用对比试验的方法，研究了１０％的白口球铁丸显微激冷对大断面球铁模拟试样组织和性能的影响，分析了显微激冷在改善大断面球铁凝固行为中的独特作用。
The of feet of St on gruphite morphology of heavy section ductile iron is studied in this paper.
研究了Ｓｉ对大断面球铁石墨形态的影响，测试了厚大球铁试块心部的冷却曲线。
The macro-fracture features of heavy section ductile iron were classified.
本文对大断面球铁断口进行了宏观分类,讨论了断口宏观、微观形貌与组织及力学性能之间的关系;研究了灰斑和黑斑断口产生的机制。