前言近十几年来,国内外大力开展了对蠕墨铸铁的研究工作。由于它的机械性能、物理性能均介于友口铸铁与球墨铸铁之间,并有着接近灰口铸铁的良好铸造性能,所以,这种材料已在机械制造领域占据了一隅,正在发展成为一种具有独特性能的机械工程材料。以光学显微镜对蠕墨铸铁进行观察,常见的石墨形态有球状石墨、球片状石墨、开花状石墨、蠕虫状石墨和点状石墨等五种形态.近年来发展的一种根据光学显微镜下观察到的石 Preface In the past ten years, the research work on vermicular graphite iron has been vigorously carried out at home and abroad. Because of its mechanical properties, physical properties are between the Friends of the cast iron and ductile iron, and has close to the cast iron gray casting good performance, so this material has occupied a corner in the field of mechanical manufacturing, is developing into a Mechanical engineering materials with unique properties. Observed with vermicular graphite compacted graphite iron, common graphite morphology spherical graphite, spherical graphite, flowering graphite, worm-like graphite and pitting graphite five forms.In recent years, the development of a light microscope observation To the stone