Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons
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The microstructure and properties of 17 wt.% Cr-2.9 wt.% C cast irons with up to 3.17 wt.% Nb additions, in both as-cast and heat treated state, have been studied. Also the influence of titanium and cerium on the structure and properties of 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb alloys are examined. NbC carbides present in the structure of tested alloys, due to their characteristic morphology, show higher wear resistance and toughness than M7C3 carbides. Increasing amount of this type of carbides, caused by the increase of niobium in Fe-Cr-C-Nb alloys, contributes to the improvement of wear resistance and dynamic fracture toughness. The alloy containing approximately 3% Nb gives the best compromise between wear resistance and fracture toughness. This alloy shows about 30% greater dynamic fracture toughness and about 30% greater abrasion wear resistance than the basic Fe-Cr-C alloy. Titanium and cerium affect the crystallisation process of Fe-Cr-C-Nb alloys and the transformation of austenite ...during the cooling after solidification. The addition of 0.26% Ti results in a substantial change in the morphology and distribution of NbC carbides. The secondary carbides which precipitate in the matrix regions of the tested 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb white iron containing titanium has an impact on the abrasion behaviour and fracture toughness. The alloy containing 0.28% Ti and 0.19% Ce has pearlite-austenitic matrix microstructure in as-cast condition. The pearlite, due to its high microhardness, improves the wear resistance under low-stress abrasion conditions, but drastically reduces the toughness of tested alloy.
Keywords:
Cast irons / Matrix microstructure / Hardness / Fracture toughness / Wear resistanceSource:
Materials & Design, 2013, 47, 41-48Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- Innovative synergy of by-products, waste minimization and clean technologies in metallurgy (RS-34033)
DOI: 10.1016/j.matdes.2012.12.034
ISSN: 0264-1275
WoS: 000315336200007
Scopus: 2-s2.0-84872410606
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Filipović, Mirjana AU - Kamberović, Željko AU - Korać, Marija AU - Gavrilovski, Milorad PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2504 AB - The microstructure and properties of 17 wt.% Cr-2.9 wt.% C cast irons with up to 3.17 wt.% Nb additions, in both as-cast and heat treated state, have been studied. Also the influence of titanium and cerium on the structure and properties of 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb alloys are examined. NbC carbides present in the structure of tested alloys, due to their characteristic morphology, show higher wear resistance and toughness than M7C3 carbides. Increasing amount of this type of carbides, caused by the increase of niobium in Fe-Cr-C-Nb alloys, contributes to the improvement of wear resistance and dynamic fracture toughness. The alloy containing approximately 3% Nb gives the best compromise between wear resistance and fracture toughness. This alloy shows about 30% greater dynamic fracture toughness and about 30% greater abrasion wear resistance than the basic Fe-Cr-C alloy. Titanium and cerium affect the crystallisation process of Fe-Cr-C-Nb alloys and the transformation of austenite during the cooling after solidification. The addition of 0.26% Ti results in a substantial change in the morphology and distribution of NbC carbides. The secondary carbides which precipitate in the matrix regions of the tested 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb white iron containing titanium has an impact on the abrasion behaviour and fracture toughness. The alloy containing 0.28% Ti and 0.19% Ce has pearlite-austenitic matrix microstructure in as-cast condition. The pearlite, due to its high microhardness, improves the wear resistance under low-stress abrasion conditions, but drastically reduces the toughness of tested alloy. PB - Elsevier Sci Ltd, Oxford T2 - Materials & Design T1 - Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons EP - 48 SP - 41 VL - 47 DO - 10.1016/j.matdes.2012.12.034 ER -
@article{ author = "Filipović, Mirjana and Kamberović, Željko and Korać, Marija and Gavrilovski, Milorad", year = "2013", abstract = "The microstructure and properties of 17 wt.% Cr-2.9 wt.% C cast irons with up to 3.17 wt.% Nb additions, in both as-cast and heat treated state, have been studied. Also the influence of titanium and cerium on the structure and properties of 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb alloys are examined. NbC carbides present in the structure of tested alloys, due to their characteristic morphology, show higher wear resistance and toughness than M7C3 carbides. Increasing amount of this type of carbides, caused by the increase of niobium in Fe-Cr-C-Nb alloys, contributes to the improvement of wear resistance and dynamic fracture toughness. The alloy containing approximately 3% Nb gives the best compromise between wear resistance and fracture toughness. This alloy shows about 30% greater dynamic fracture toughness and about 30% greater abrasion wear resistance than the basic Fe-Cr-C alloy. Titanium and cerium affect the crystallisation process of Fe-Cr-C-Nb alloys and the transformation of austenite during the cooling after solidification. The addition of 0.26% Ti results in a substantial change in the morphology and distribution of NbC carbides. The secondary carbides which precipitate in the matrix regions of the tested 17 wt.% Cr-2.9 wt.% C-2 wt.% Nb white iron containing titanium has an impact on the abrasion behaviour and fracture toughness. The alloy containing 0.28% Ti and 0.19% Ce has pearlite-austenitic matrix microstructure in as-cast condition. The pearlite, due to its high microhardness, improves the wear resistance under low-stress abrasion conditions, but drastically reduces the toughness of tested alloy.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Materials & Design", title = "Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons", pages = "48-41", volume = "47", doi = "10.1016/j.matdes.2012.12.034" }
Filipović, M., Kamberović, Ž., Korać, M.,& Gavrilovski, M.. (2013). Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons. in Materials & Design Elsevier Sci Ltd, Oxford., 47, 41-48. https://doi.org/10.1016/j.matdes.2012.12.034
Filipović M, Kamberović Ž, Korać M, Gavrilovski M. Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons. in Materials & Design. 2013;47:41-48. doi:10.1016/j.matdes.2012.12.034 .
Filipović, Mirjana, Kamberović, Željko, Korać, Marija, Gavrilovski, Milorad, "Microstructure and mechanical properties of Fe-Cr-C-Nb white cast irons" in Materials & Design, 47 (2013):41-48, https://doi.org/10.1016/j.matdes.2012.12.034 . .