在炉前能迅速地判断出铁水的等级或牌号甚至主要成分含量是保证和控制铸铁质量的重环节之一。为了给普通灰铸铁炉前检验提供方便和参考,根据通常采用的三角试样(20× 40×120,湿砂型铸造)的断口特征与铁水的牌号、碳当量和碳硅含量的关系,经过一系列的试验,并参考了有关资料[1. In the furnace can quickly determine the level or grade of hot metal or even the main component content is to ensure and control the quality of cast iron one of the heavy links. In order to provide convenience and reference for the normal gray cast iron furnace test, according to the relationship between the fracture characteristics of the commonly used triangular sample (20 × 40 × 120, wet sand casting) and the grade of molten iron, carbon equivalent and carbon silicon content, Series of tests, and with reference to the relevant information [1.