铸态高韧性球墨铸铁的研制和应用

Research on As-Cast High Toughness Ductile Cast Iron and Its Application

摘要: 对铸态直接获得高韧性球铁进行了研究。试验表明,在保证石墨球化良好的情况下,硅、锰含量是影响铁素体量和延伸率δ%的主要因素,δ%值随着硅的增加和锰的降低而相应地提高,在Si(2.90~3.20)%、Mn(0.15~0.40)%范围内,δ%值可达(19~21)%。这种铸态高韧性球铁成功地用于生产厚大断面和薄壁铸件。

Abstract: The high toughness ductile cast iron directly obtained at as-cast state had been studied. It was found that the content of Si and Mn were the main factors affecting the amount of ferrite and the value of δ% under the good state of graphite spheroidization. The value of δ% raised with the increasing in amound of Si and the decreasing in amount of Mn. When the amount of Si was in the range of (2.90-3.20) wt% and Mn in the range of (0.15-0.40) wt%, the value of 6% reached (19-21)%. This kind of as-cast high toughness ductile cast iron has been successfuly used in producing heavy section castings and thin section castings.