The natural form of carbon in cast iron is the freegraphite flake form.
铸铁内的碳天然形式是游离石墨薄片形式。
2
Ductile iron is the alloy of iron, carbon and silicon, of which carbon is in the form of spherical freegraphite.
球墨铸铁是一种铁、碳、硅的合金，其中碳以球状游离石墨存在。
3
Magnetic susceptibility of polygranular carbon and graphite materials obtained with a new measurement technique, which avoids free rotation of the samples in the magnetic field, was investigated.