تأثير عمليات حرارتي همگن سازي چدن نشكن در حضور فاز مذاب بر پروفيل غلظتي عناصر آلياژي نيكل و موليبدن

Effect of Homogenizing of Ductile Iron Using Partial Melting Heat Treatment on Concentration Profiles of Nickel and Molybdenum Alloying Elements

In this research, a study was carried out to detect segregation of alloying elements in ductile iron by testing on sample made by the melt produced in induction furnace. Point analysis was made by SEM attached with spot EDS. The results showed that Ni is segregated next to graphite nodules because its distribution coefficient is 6/75. On the other hand\ Mo is segregated between graphite nodules and its distribution coefficient is 0/16. As common methods were not efficient, partial melting method had been used to homogenize alloying elements in ductile iron matrix. Homogenization was carried out at 1130°C for cast specimens. Molybdenum segregation, between graphite nodules, decreased melting point in these region. On the