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球墨鑄鈇是一种非常优秀的新的工程材料,它兼有普通灰铸鉄的澆鑄性能和切削加工性能,以及鑄鋼的机械性能。在冶金学上,球墨鑄鉄可以認为是一种包含有球狀石墨夾杂物的低台金鋼。球狀石墨的存在形式,造成了能充分利用金属基休所固有的强度及塑性的条件。球墨鑄鉄中的镁不仅使石墨球狀化,也可使金屬基体組織的晶粒微細化,并增高珠光休的瀰散性而造成索氏体形式的珠光体。
Ductile cast iron is a very good new engineering material, which combines the casting properties of ordinary gray cast iron and cutting performance, as well as the mechanical properties of cast steel. In metallurgy, ductile cast iron can be considered as a low-alloy steel containing spherical graphite inclusions. The existence of spherical graphite, resulting in can take full advantage of the inherent strength of the metal base and plastic conditions. Magnesium in nodular castings not only spheroidize graphite, but also refine the grains of the metallic matrix and increase the dispersion of the pearlescent grains, resulting in sorbite.