浅谈石墨对球墨铸铁机械性能的强化作用

ccording to many years’ experience in processing nodular cast iron, the author indicates that the globular graphite in the nodular cast iron, compared with steel and gray past iron, not only plays an important role in reducing the internal stress, but also can be considered as a “carbon bank” which can release and recover carbon atoms during the phase transformation, and therefore the intensity and ductility of the cast iron are greatly improved. The mechanism would be an essential theoretical basis and instruction for developing new casting.