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国际上自“球状石墨铸铁”问世以后,铸铁合金掀起了“以铸代锻,以铁代钢”的局面,为工业建设作出了很大贡献。现在“点状石墨铸铁”的研制成功是冶金学上的异军突起,从实验到投产以来,无论在机械性能、工艺、技术等方面都显示了很高的社会效益与经济效益。在不用镁合金和无需优质生铁的条件下,炉前变质处理十分稳定地从铸铁中析出点状石墨或相当于最佳“球铁”中的小球状石墨,石墨量达600～700个/mm~2,从铸态中直接获得珠光体或铁素体基体,其机械性能赶上“球
Internationally since the advent of “spherical graphite cast iron”, cast iron alloy set off a “cast forge forging, steel for iron” situation, made a great contribution to industrial construction. At present, “pitting graphite cast iron” is the success of the metallurgy of the sudden emergence, from the experiment to put into operation, both in mechanical properties, technology, technology and other aspects have shown high social and economic benefits. In the absence of magnesium alloy and without the need for high-quality pig iron, the pre-furnace metamorphic treatment is very stable precipitation of pitting graphite from the cast iron or equivalent to the best “ductile iron” in the small ball graphite, graphite amount of 600 to 700 / mm ~ 2, obtained directly from the as-cast pearlite or ferrite matrix, its mechanical properties to catch the "ball