Ductile cast iron manhole anovhara

Ductile cast iron manhole anovharainonyanya kugadzirwa ne ductile cast iron.

Ductile iron manhole cover ine izvi zvakanakira:

nekuda kwesimba repamusoro uye kusimba kwakanaka kwe ductile iron, iyo ductile iron manhole kavha inenge30% yakarerukakupfuura chifukidziro chegomba resimbi chipfumbu chemhando imwe chete.

Hunhu hwe ductile iron manhole cover:

① Kuomarara kwakanaka. 

Iko kukosha kwekukanganisa kunodarika kagumi kune yegrey iron material.

②Strong corrosion resistance.

Mvura yekupfapfaidza corrosion test, mazuva makumi mapfumbamwe ekuora ingori 1/40 yepombi yesimbi, i1/10 yegrey iron pombi.Hupenyu hwesevhisi ndeye 2 nguva pane iyo yegrey iron pombi uye kashanu pane iyo yakajairika simbi pombi.

③Plasticity yakanaka.

kureba ≥7%, yakafanana nepamusoro kabhoni simbi.Asi grey iron material elongation inenge zero.

④Simba repamusoro.

Tensile simba OB ≥420MPa, goho simba OS ≥300MPa, iri katatu grey iron zvinhu.