本文对灰铸铁板、球墨铸铁板、铸造碳钢板进行气割性能实验,主要从含碳量与石墨在铸铁中存在形态不同的角度对气割数据进行分析,指出铸铁件的割缝宽度与割缝质量不仅与铸铁的含碳量有关,而且与铸铁中石墨的存在形态关系密切,即“含碳量的增加,杂质元素的增多,石墨的片状分布”使得铸铁的气割成为一个不连续的基体熔化过程,而球状石墨在基体上的均匀分布则改善了铸铁的气割性能。 In this paper, gas cutting performance experiments on gray cast iron, ductile iron and carbon steel were carried out. The gas cutting data were analyzed mainly from the different carbon content and the existence of graphite in cast iron. It was pointed out that the cutting width and cutting quality It is not only related to the carbon content of cast iron, but also closely related to the existing form of graphite in cast iron, ie “the increase of carbon content, the increase of impurity elements and the flake distribution of graphite” make the gas cutting of cast iron a discontinuous Matrix melting process, and the uniform distribution of spherical graphite in the matrix will improve the gas cutting performance of cast iron.