高强度灰口铸铁(孕育铸铁)的生产实践证明,只有铁水成分选择在位于铸件组织图的麻口区,组织中出现少量自由渗碳体的情况下,炉前进行小剂量孕育处理,使铁水由部分按介稳定系凝固转为按稳定性凝固,才能得到预期的效果。我们的试验是,对于碳当量很低,全部按稳定系凝固的铁水(如可锻铸铁),能否进行大剂量孕育处理,使其转变为全部按 High strength gray cast iron (bred iron) production practice has proved that only the hot metal components are located in the area of ​​the mouth of the castings Makou District, the organization appears a small amount of free cementite in the case of small doses before the furnace inoculation, the hot metal According to the stability by the part of the metastable system solidified in order to get the desired effect. Our test is that if the carbon equivalent is very low, all of the hot metal (such as malleable iron) solidified according to the stable system can be treated with a large amount of inoculum so that it can be transformed into all