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The characteristics of the ductile iron pipes

by:XEX     2020-11-29
Ductile iron pipe is a kind of cast iron pipe. In terms of quality, requirements to control the degree of spheroidal graphite cast iron pipe 1 - 3 ( Spheroidization rate of 80%) In order to better improve the mechanical properties of ductile iron pipe material itself finished-parts storage ductile iron pipes finished-parts storage performance of the steel. Annealing microstructure of nodular cast iron pipe for ferrite plus a small amount of pearlite. It has good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, it is mainly used for municipal, industrial and mining enterprises, water supply, gas and oil. Ferrite and pearlite matrix distribution on a certain number of spheroidal graphite. According to the requirements of nominal diameter and elongation percentage of ferrite and pearlite in the matrix organization. Small diameter of the pearlite proportion is generally not more than 20%, the proportion of large diameter pearlite general control in 25%.
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