鑄態高韌性球墨鑄鐵的研制和應用

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

摘要: 對鑄態直接獲得高韌性球鐵進行了研究。試驗表明,在保證石墨球化良好的情況下,硅、錳含量是影響鐵素體量和延伸率δ%的主要因素,δ%值隨著硅的增加和錳的降低而相應地提高,在Si(2.90~3.20)%、Mn(0.15~0.40)%范圍內,δ%值可達(19~21)%。這種鑄態高韌性球鐵成功地用于生產厚大斷面和薄壁鑄件。

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.