Influence of Low-Alloy Cast Steel Modification on Primary Structure Refinement, Type and Shape of Non-Metallic Inclusions

Open access

Abstract

In the article there are presented methods and results of investigation which main aim were determination of influence of melting technology (gas extraction, vacuum refining, slag refining and extraction, deoxidation and degassing) and type of used modifiers on the type and shape of non-metallic inclusions and the primary structure refining. Low alloy cast steel melted in laboratory conditions, in an inductive furnace was investigated. Additions of FeNb, FeV, FeTi and FeZr modifiers were applied. The contents of oxygen and nitrogen in obtained cast steel were determined.

The most advantageous impact on refining of the primary structure of has been found for the modifiers FeTi+FeZr. In cast steel with the addition of Zr the conglomerates from a different non -metallic inclusions have been observed. Zirconium probably plays role of the nucleus - creating for other inclusions present in the conglomerates. Clusters of inclusions due to their size affect the crystallization and grain growth processes reducing grain size of the primary structure.

[1] D. Bartocha, J. Kilarski, J. Suchoń, C. Baron, J. Szajnar, K. Jan-erka, Low-alloy constructional cast steel, Archives of Foundry Engineering 11, SI 3, 265-271 (2011).

[2] D. Bartocha, J. Kilarski, J. Suchoń, C. Baron, J. Szajnar, Ef-fect of tempering temperature on the properties of low-alloy cast steel, Archives of Foundry Engineering 11, SI 3, 272-276 (2011).

[3] K. Janerka, D. Bartocha, J. Szajnar, Carburization process rate in production of synthetic cast iron, Archives of Materials Science and Engineering 36, 1, 55-61 (2009).

[4] B. Kalandyk, The influence degassing and modification processes on the morphology of non-metallic inclusions in the carbon cast steel, Archives of Foundry 6, 18 (1/2) 419-424 (2006).

[5] J. Głownia, K. Hubner, Morphology nitrides during deoxidation of steel, Solidification of Metals and Alloys 31, 53-62 (1997).

[6] J. Głownia, B. Kalandyk, I. Telejko, Degassing and modification of IN-738 and ŻS6K alloys, Solidification of Metals and Alloys 22, 112-117 (1995).

[7] S. Wieloch, J. Głownia, Theoretical aspects of heterogeneous modification of cast steel, Solidification of Metals and Alloys 13, 55-68 (1988).

[8] W.K. Krajewski, J. Buras, M. Zurakowski, A.L. Greer, Structure and properties of grain-refined Al-20 wt.% Zn sand cast al-loy, Archives of Metallurgy and Materials 54, 329-334 (2009).

[9] K. Haberl, W.K. Krajewski, P. Schumacher, Microstructural features of the grain-refined sand cast AlZn20 alloy, Archives of Metallurgy and Materials 55, 837-841 (2010).

[10] W.K. Krajewski, Phases of heterogeneous nucleation in the ZnAl25 alloy modified by Zn-Ti and Al-Ti master alloys, Zeitschrift fur Metallkunde 87, 645-652 (1996).

[11] W.K. Krajewski, A.L. Greer, EBSD Study of ZnAl25 Alloy Inoculated with ZnTi4 Master Alloy, Materials Science Forum 508, 281-286 (2006).

[12] J. Szymszal, E. Krzemień, T. Zając, Modification of metals and alloys, Gliwice (1984).

[13] D. Bartocha, C. Baron, J. Suchoń, J. Kilarski, J. Szajnar, W. Sebzda, Assessment of the low alloy cast steel inoculation ef-fects with chosen additives, Archives of Foundry Engineering 12, 2, 211-214 (2012).

[14] D. Bartocha, J. Suchoń, C. Baron, J. Szajnar, Influence of re-finement of primary cast steel structure on ultrasonic wave propagation velocity, Metal 2013, Brno, (2013).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.571
5-year IMPACT FACTOR: 0.776

CiteScore 2016: 0.85

SCImago Journal Rank (SJR) 2016: 0.347
Source Normalized Impact per Paper (SNIP) 2016: 0.740

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 160 153 9
PDF Downloads 105 102 18