离心铸造球墨铸铁管伸长率波动的原因及稳定措施

Analysis of Variables Affecting the Elongation of Centrifugal Ductile Cast Iron Pipe and its Measures

增加石墨球数量和提高球化率，有利于改善离心铸造球墨铸铁管的伸长率。提高铁液的碳当量、增加孕育剂量和降低铸态组织的渗碳体数量，均有利于增加石墨球数量。在此基础上，提出了稳定离心铸造球墨铸铁管伸长率值的对策。

AbstractAnalysis of Variables Affecting the Elongation of Centrifugal Ductile Cast Iron Pipe and its Measures.Increasing of the number of nodular graphite and the nodularity is favourable to improving the elongation of centrifugal ductile cast iron pipe.Adding of carbon equivalent and the amount of inoculant can reduce the amount of as cast carbide and increase the number of nodular graphite.Some measures stabilizing the elongation are proposed.