Original scientific paper

Centreline formation of Nb(C, N) eutectic in structural steel

J. Bernetič ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
B. Bradaškja ; Acroni d. o. o., Jesenice, Slovenia
G. Kosec ; Acroni d. o. o., Jesenice, Slovenia
E. Bricelj ; Acroni d. o. o., Jesenice, Slovenia
B. Kosec ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
F. Vodopivec ; Institute of Metals and Technology, Ljubljana, Slovenia
L. Kosec ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia

Abstract

The reduction of area in the through thickness direction is an essential mechanical property of thick steel heavy plates. By a routine control, a very small through thickness reduction of area was found for tensile specimen of a 90 mm plate. Careful investigations of the fracture and section of specimens cut from the as solidified continuously cast 250mmthick slab showed that the cause was the presence of coarse particles of niobium carbonitride as constituent of the quasi eutectic Fe-Nb(C, N) that form because of the centerline segregation of niobium.

Keywords

structural steel; heavy plates; through thickness reduction of area; eutectic niobium carbonitride

Hrčak ID:

40246

URI

https://hrcak.srce.hr/40246

Publication date:

1.1.2010.

Article data in other languages: croatian

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