Hello everyone, I am the youngest girl in the factory.
Today we will talk about how to increase the number of
graphite balls in thin-walled ductile iron.
1. Increase the carbon and silicon content, that is, the CE value.
2. Ensure the necessary S content in the original molten iron.
Various sulfides are the original bases of spheroidal graphite cores.
Too low S content affects the formation of various sulfides
and reduces graphite nucleation cores.
3. Strengthen the breeding.
Improve the inoculation method and shorten the time from
spheroidization to pouring as much as possible;
use high-efficiency inoculants with rare earth elements such as
lanthanum, cerium, praseodymium, and neodymium;
adding a trace amount of bismuth can significantly increase
the number of graphite balls in thin-walled ductile iron.
It is especially worth noting that bismuth is
a strong anti-spheroidizing element,
and excessive addition should be avoided.
Follow me, the youngest girl in the factory.
Learn more about cast iron tips~
Today we will talk about how to increase the number of
graphite balls in thin-walled ductile iron.
1. Increase the carbon and silicon content, that is, the CE value.
2. Ensure the necessary S content in the original molten iron.
Various sulfides are the original bases of spheroidal graphite cores.
Too low S content affects the formation of various sulfides
and reduces graphite nucleation cores.
3. Strengthen the breeding.
Improve the inoculation method and shorten the time from
spheroidization to pouring as much as possible;
use high-efficiency inoculants with rare earth elements such as
lanthanum, cerium, praseodymium, and neodymium;
adding a trace amount of bismuth can significantly increase
the number of graphite balls in thin-walled ductile iron.
It is especially worth noting that bismuth is
a strong anti-spheroidizing element,
and excessive addition should be avoided.
Follow me, the youngest girl in the factory.
Learn more about cast iron tips~
