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X-ray Diffraction Study of Directional Solidification Ledeburite

Archives of Foundry Engineering | 2015 | No 3 | DOI: 10.1515/afe-2015-0063

Keywords X-ray diffraction Ledeburite eutectic Directional solidification

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Abstract

Directionally solidified sample of Fe-Fe3C eutectic alloy were produced under an argon atmosphere in a vacuum Bridgman-type furnace to

study the eutectic growth with v = 167 μm/s pulling rate and constant temperature gradient G = 33.5 K/mm. Since how the growth texture

of eutectic cementite is related to its growth morphology remains unclear, the current study aims to examine this relationship. The technique

such as X-ray diffraction, have been used for the crystallographic analysis of carbide particles in white cast irons.

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Authors and Affiliations

M. Trepczyńska-Łent

T. Szykowny

Characteristics of Ledeburite in EDS Analyses of Directionally Solidified Eutectic White Cast Iron

M. Trepczyńska-Łent J. Seyda

Archives of Foundry Engineering | 2022 | vol. 22 | No 4 | 65-71 | DOI: 10.24425/afe.2022.143951

Keywords Microsegregation SEM-EDS analysis Ledeburite Cementite White cast iron

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Abstract

The paper addresses the microsegregation of Mn, Mo, Cr, W, V, Si, Al, Cu and P in the white cast iron. Eutectic alloy with the content of 4.25% C was studied. The white cast iron was directionally solidified in the vacuum Bridgman-type furnace at a constant pulling rate v = 83 μm/s and v = 167 μm/s and at a constant temperature gradient G = 33.5 K/mm. The microstructural research was conducted using light and scanning electron microscopy. The microsegregation of elements in ledeburite was evaluated by EDS measurements. Content of elements in ledeburitic cementite and ledeburitic pearlite was determined. The tendency of elements to microsegregation was found dependent on the solidification rate. Microsegregation of elements between pearlite and cementite structural constituents has been specified. The effect of solidification rate on the type and intensity of microsegregation in directionally solidified eutectic white cast iron was observed. A different type of microsegregation was observed in the components of ledeburite in cementite and pearlite.

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