Fading of inoculation effects in ductile iron

• Autorzy: Fraś, E. , Górny, M.
• Języki publikacji: EN

Abstrakty

EN

In work it has been shown results of investigations of influence of time lapsed form inoculation process on graphite nucleation potential represented by: number of graphite nodules N and N_v maximum undercooling ΔT_m, during solidification of graphite eutectic, absolute chilling tendency CT and critical casting diameter d_kr, under which cementite eutectic occur (so-called chills). Moreover it has been estimated rate of change of N and N_v, ΔT_m, CT and d_kr. Also, it has been proved that after one minute since the moment of inoculation process about 35% of graphite nucleation potential is lost, by 40% chilling tendency, by 70% increases maximum undercooling for graphite eutectic and by nearly 40% casting diameter has to be increased in order to avoid chills.

Słowa kluczowe

PL

żeliwo sferoidalne; proces inokulacji; skłonność do zabieleń

EN

ductile iron; inoculation process; graphite nodule count; chilling tendency

• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 1 spec.
• Strony: 83--88
• Opis fizyczny: Bibliogr. 5 poz., tab., wykr.

Twórcy

autor

Fraś, E.

• AGH - University of Science and Technology, Reymonta 23, 30-059 Cracow, Poland,

autor

Górny, M.

• AGH - University of Science and Technology, Reymonta 23, 30-059 Cracow, Poland

Bibliografia

• [1] Fraś E., Górny M., Lopez H.F.: Eutectic Cell and Nodule Count in Cast Iron, International Steel and Iron Japan Institute, ISIJ ., vol. 47 (2007) No. 2, 269.
• [2] Lesoult G, Castro M., Lacaze J.: Solidification of Spheroidal Graphite Cast Iron: III Microsegregation related effects. Acta Materialia, 1999, vol. 47, 3779.
• [3] Venugopalan D.: A Kinetic Model of the γ → α + Gr Eutectoid Transformation in Spheroidal Graphite Cast Iron, Metallurgical and Materials Transactions, 1990, vol. 21 A, 913.
• [4] Fraś E., Lopez H.: Generation of International Pressure During Solidification of Eutectic Cast Iron. AFS Transactions, 1994, vol. 102, 597.
• [5] Wiencek K., Ryś.: The estimation of Fe3C particie density in steel by simple counting measurements made in plan sections, Materials and Engineering, 1998, vol. 3, 396.