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球磨铸铁管1——球墨管成分(精华)

发布时间:2021-03-01 10:12 | 编辑:球墨管成分 | 33 次浏览
在我国很多地区,球墨铸铁管在中、小口径的给管与管之间的联接,采用承插式或法兰盘式接口方法;球墨铸铁管是铸铁管的一种。质量上要求铸铁管的球化等级控制为1-3级(球化率》80%),因而材料本身的机械性球墨铸铁管成品库能得到了较好的改善,具有铁的本质、钢的性能。

球磨铸铁管1——球墨管成分(精华)


摘要:

在我国很多地区,球墨铸铁管在中、小口径的给管与管之间的联接,采用承插式或法兰盘式接口方法;球墨铸铁管是铸铁管的一种。质量上要求铸铁管的球化等级控制为1-3级(球化率》80%),因而材料本身的机械性球墨铸铁管成品库能得到了较好的改善,具有铁的本质、钢的性能。


       在我国很多地区,球墨铸铁管在中、小口径的给管与管之间的联接,采用承插式或法兰盘式接口方法;球墨铸铁,容许限制的转角必须有优胜的抗震性和密封性。


     In many areas of our country, socket or flange joint method is used for the connection between medium and small diameter ductile iron pipes. For ductile iron, the allowable limited corner must have superior seismic resistance and sealing performance.

       球墨铸铁管的主要成分有碳、硅、锰、硫、磷和镁等。执行标准 GB/T13295-2003 ISO2531/2003。

     The main components of ductile iron pipe are carbon, silicon, manganese, sulfur, phosphorus and magnesium. Executive standard GB / t13295-2003, ISO2531 / 2003.

       球墨铸铁管定义使用18号以上的铸造铁水经添加球化剂后,经过离心球墨铸铁机高速离心铸造成的管道,称球墨铸铁管(Ductile Cast Iron Pipes),简称为球管、球铁管和球墨铸管等。

    Ductile iron pipes are defined as pipes made by high-speed centrifugal casting with No. 18 or more molten iron after adding nodularizing agent, which are called ductile iron pipes, and are referred to as ductile iron pipes, ductile iron pipes and ductile iron pipes.




       球墨铸铁管是铸铁管的一种。质量上要求铸铁管的球化等级控制为1-3级(球化率》80%),因而材料本身的机械性球墨铸铁管成品库能得到了较好的改善,具有铁的本质、钢的性能。退火后的球墨铸铁管,其金相组织为铁素体加少量珠光体,机械性能良好,防腐性能优异、延展性能好,密封效果好,安装简易、主要用于市政、工矿企业给水、输气,输油等。

       在铁素体和珠光体基体上分布有一定数量的球状石墨,根据公称口径及对延伸率的要求不同,基体组织中的铁素体和珠光体的比例有所不同,小口径的珠光体比例一般不大于20%,大口径的一般控制在25%左右。

     Ductile iron pipe is a kind of cast iron pipe. In terms of quality, it is required that the spheroidization grade of cast iron pipe should be controlled as 1-3 (spheroidization rate > 80%), so the mechanical finished product warehouse of ductile iron pipe can be better improved, which has the nature of iron and the properties of steel. The metallographic structure of annealed ductile iron pipe is ferrite with a small amount of pearlite. It has good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect and easy installation. It is mainly used for water supply, gas and oil transportation in municipal and industrial enterprises.
      There are a certain amount of spherical graphite distributed on the ferrite and pearlite matrix. According to the different requirements of nominal diameter and elongation, the proportion of ferrite and pearlite in the matrix structure is different. The proportion of pearlite with small diameter is generally not more than 20%, and that with large diameter is generally controlled at about 25%.



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