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球墨铸铁和普通铸铁的区別铸铁主要由铁、碳、矽三种元素组成,此外也有锰、磷和硫存在,碳和矽可促使碳化铁分解,而锰则可使之稳定。碳、矽、锰的多寡,可决定铸铁的基体为珠光体或铁素体,及是否有游离的碳化铁存在。普通灰口铸铁,含碳3%以上,矽2%左右。它和铸钢不同之处,就是因为碳和矽都比钢高得多,而在基体内有着多量的片状石墨,这些石墨片把基体分割,使其强度大为减低,并失去引伸性。因此冶金工作者多年以来,就在想如何控制石墨的形状、大小和分布,从而提高铸铁的机械性能。延性铸铁(俗称马铁)在铸铁时是白口铁,经长时期处理后,碳化铁分解而成石墨,它的形状大
The difference between ductile iron and ordinary cast iron Cast iron is mainly composed of iron, carbon, silicon three elements, in addition there are manganese, phosphorus and sulfur exist, carbon and silicon can promote the decomposition of iron carbide, and manganese can make it stable. The amount of carbon, silicon, manganese, can determine the matrix of cast iron pearlite or ferrite, and the presence of free iron carbide. Ordinary gray cast iron, carbon 3% or more, 2% of silicon. It is different from cast steel because both carbon and silicon are much higher than steel, and there is a large amount of flake graphite in the matrix. These graphite sheets divide the matrix so that its strength is greatly reduced and its extensibility is lost. Therefore, for many years, metallurgists have been wondering how to control the shape, size and distribution of graphite to improve the mechanical properties of cast iron. Ductile iron (commonly known as horse iron) in the cast iron is white iron, after a long period of treatment, the decomposition of iron carbide into graphite, its shape is large