EFFECT OF NITROGEN ON GRAPHITE MORPHOLOGY IN GRAY CAST IRON
氮对灰铸铁中石墨组织的作用

The distribution of nitrogen and morphology of graphite in the gray cast iron containing nitrogen were studied by adopting the man-made specimens of Fe-C-Si-Mn alloys with some nitrogen added. The nitrogen adsorbed along interfaces between graphite and matrix together with solid-solutioned in graphite is believed to be the principal cause of morphological variation of graphite.