热模法大口径2GS球铁管承口夹渣缺陷的防止

The Prevention Measures of the Slag Inclusion of Socket of Big Diameter 2GS Ductile Iron Pipe by Hot Mold

通过对大口径球铁管球化处理及浇注工艺进行研究,确认承口充型时间、承口凝固速度、涂料的强度及覆盖剂中的铁屑是形成热模法球铁管承口夹渣的主要因素。为了避免承口夹渣缺陷,同时进一步降低球化工序成本,我们对球化处理工艺及浇注工艺进行改进,提高了产品的质量,取得良好的经济效益。

Through researching the spheroidization and casting technology of big diameter ductile iron pipe,this paper determined that the main factor of slag inclusion of socket is the duration of casting socket,solidification speed of socket,cohesive strength of coating and scrap iron in covering agent.Through improving the spheroidization and cast-ing technology,avoid the slag inclusion of socket,reduce the cost of spheroidization process,improve the quality of product,and obtain the good economic benefit.