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1、绪言球墨铸铁随着需要量的增加,在全世界已显示出其稳定的增长,与研制初期相比,不仅仅球墨铸铁的制造技术进步了,而且由于特性的改善和质量的提高,对于它的信赖性也增加了。特别是在高温下使用的高耐久性铸件,例如轧辊和船用大型发动机部件的应用就是个例子。这个倾向今后会日益明显。另外,在铸铁界,由于省工、节能的必要性增加,要求降低成本成为今后的发展方向。特别是铸态球墨铸铁,为
1. INTRODUCTION As the demand increases, ductile iron has shown steady growth all over the world. Compared with the initial stage of development, ductile iron has not only improved the manufacturing technology, but also improved the characteristics and quality of ductile iron. Its trust has also increased. The use of high-durability castings especially at high temperatures, such as rolls and large marine engine components, is an example. This tendency will be increasingly evident in the future. In addition, in the iron sector, due to labor-saving, energy-saving increased the need to reduce costs as the future direction of development. Especially cast ductile iron, for