The distribution of chemical composition and microstructure for cracking socket of centrifugal cast ductile iron pipe, and the effect of them on the cracking behavior have been studied.
分析了离心球铁管开裂承口的组织、成分分布，探讨了组织、成分对承口开裂的影响。
The annealing process of centrifugal ductile cast iron pipe by the heated mould method is studied.
研究了热模法离心铸造球铁管的退火工艺。
The annealing process of centrifugal ductile cast iron pipe by the heated mould method is studied.
研究了热模法离心铸造球铁管的退火工艺。
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