蠕墨铸铁的机械性能比灰铸铁高得多,它的抗拉强度一般为36～42公斤力/毫米~2,抗弯强度为70～100公斤力/毫米~2,延伸率为1～6％,铸造性能比球铁好,而且还有耐热疲劳的特殊性能。作为一种新兴的铸造材料,蠕墨铸铁越来越受到人们的重视。下面把我厂近年来用冲天炉生产蠕墨铸铁及炉前控制情况介绍一下。一、蠕墨铸铁原铁水成分的选择蠕墨铸铁对原铁水的要求是温度高、碳当量高、含硫量低,同时要求铁 Compacted graphite cast iron has much higher mechanical properties than gray cast iron. Its tensile strength is generally 36-42 kgf / mm2, flexural strength is 70-100 kgf / mm2, and its elongation is 1-6 %, Casting performance better than ductile iron, but also the special properties of thermal fatigue. As a new foundry material, compacted graphite cast iron has drawn more and more attention. The following I plant in recent years with cupola production compacted graphite cast iron and furnace control situation about. First, the compacted graphite iron Original hot metal composition of choice Compacted graphite cast iron on the original hot metal is high temperature, high carbon equivalent, low sulfur content, while requiring iron