The magnesium or magnesium contain ferrosilicons are used as nodulizing
agent during casting of ductile iron.
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Drum, Double Roll Crushers And Sinter Screens And Repair/Replacement Of Chain Conveyors.
the charges 1 and 2 were treated with greater quantities (identical for the two charges) of nodulizing modifier, FeSiMgCe(RE) and with same amount of graphitizing modifiers, but different from the chemical composition point of view: FeSi--charge 1 and FeSiSr--charge2;
the charges 3 and 4 were treated with smaller quantities (identical for two charges) of nodulizing modifier, FeSiMgCe(RE) and with the same amount of graphitizing modifier (as for charges 1 and 2): FeSi - charge 3 and FeSiSr charge 4.
This shape analysis of compact graphite separations of modified cast irons, can show us that the use of the nodulizing modifier FeSiMgCe(RE) in a greater concentration (1.
The formation of nodules is achieved by the addition of nodulizing
elements, most commonly magnesium (note magnesium boils at 1100[degrees]C and iron melts at 1500[degrees]C) and, less often now, cerium (usually in the form of Misch metal).
In order to obtain the compacted graphite we used two modification technological variants regarding the type of nodulizing (compacting) modifiers used.
Thus, the following nodulizing (compacting) modifiers were used:
Higher values of the yield strength were obtained in the CGI, obtained through modification by the compacting of the graphite separations with a slightly greater supplement of the FeSiMgCe(RE), charge 1, compared to charge 2, where we used (keeping in mind the explanations already presented) a less higher supplement of graphite modifier (FeSiSr); lower yields strength resulted for the CGI, charge 3, obtained through a nodulizing modification with FeSiMgCaCe(RE) and through a graphite modification with a lower supplement of FeSiSr, compared to charge 4.
Great for new employees or anyone wanting a basic introduction to ductile iron metallurgy, this course covers the following topics: the members of the cast iron family; comparisons of the cast iron family; the specifications of the cast iron family; the chemistry of the cast iron family; inoculants used to create ductile iron; production problems; changes in properties when production problems occur; the microstructure of ductile iron; the alloy content of ductile iron; treatment methods; physical limitations; nodulizing
problems; process control.
The Effect of Minimizing Rare Earth Elements During Nodulizing
Treatments and the Inoculation of Ductile Iron (14-004)
The effects of the nodulizing
treatment of a base iron with magnesium and rare earth elements fade over a relatively short time.