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在常温下可锻铸铁属于韧性铸铁,随着温度的降低和变形速率的增加,可锻铸铁由韧性逐渐向脆性转化,在一定温度下变成了脆性材料,断口的外貌也由典型的黑绒断口(韧性断裂),变成了全白断口(脆性断裂).
Malleable cast iron belongs to ductile cast iron at room temperature. With the decrease of temperature and the increase of deformation rate, ductile cast iron gradually changes from brittleness to brittleness at a certain temperature. The appearance of the fracture is also characterized by the typical black velvet fracture ), Into a full white fracture (brittle fracture).