Interfacial characterization and erosive wear performance of zirconia toughened alumina ceramics particles reinforced high chromium white cast irons composites

In this article, the effects of an ionic nitriding treatment are analysed, together with deliberate variation of different thermal parameters associated with the destabilisation of austenite, on erosive wear resistance of white cast irons with 25% Cr. The methodology followed in this research was an experimental design, where six factors were analyzed by performing eight experiments. The thickness of the nitrided layer is much smaller than in white cast iron with lower percentages in Cr, never reaching 20 microns. The nitriding treatment entails considerable softening of the material underneath the nitriding layer. This softening behaviour becomes partially inhibited when the destabilisation temperature of austenite is 1100 °C and dwell times at such temperature are prolonged. This temperature seems to play a significant role in the solubilization of non-equilibrium eutectic carbides, formed during industrial solidification. The nitriding treatment leads to additional hardening, which, in these cases, favours a second destabilisation of austenite, with additional precipitation of secondary carbides and the transformation of retained austenite into martensite. Despite softening of the material, the nitriding treatment, together with air-cooling after destabilisation of the austenite, allows a noticeable increase in resistance to erosive wear.

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Assessment on abrasiveness of high chromium cast iron material on the wear performance of PCBN cutting tools in dry machining

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2017.11.054 ◽

2018 ◽

Vol 255 ◽

pp. 110-120 ◽

Cited By ~ 13

Author(s):

Ling Chen ◽

Jan-Eric Stahl ◽

Wu Zhao ◽

Jinming Zhou

Keyword(s):

Cast Iron ◽

Cutting Tools ◽

Dry Machining ◽

Wear Performance ◽

High Chromium ◽

High Chromium Cast Iron ◽

Iron Material ◽

Chromium Cast Iron

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Effects of Cr2O3 addition on the mechanical properties, microstructure and wear performance of zirconia-toughened-alumina (ZTA) cutting inserts

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2011.09.092 ◽

2012 ◽

Vol 513 ◽

pp. 91-96 ◽

Cited By ~ 40

Author(s):

Ahmad Zahirani Ahmad Azhar ◽

Lee Chun Choong ◽

Hasmaliza Mohamed ◽

Mani Maran Ratnam ◽

Zainal Arifin Ahmad

Keyword(s):

Mechanical Properties ◽

Wear Performance ◽

Cutting Inserts ◽

Zirconia Toughened Alumina

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Abrasive and Erosive Wear Performance of Rare Earth Oxide Doped Ni/WC Coatings

Journal of Tribology ◽

10.1115/1.4025099 ◽

2013 ◽

Vol 136 (1) ◽

Cited By ~ 1

Author(s):

Surajit Purkayastha ◽

D. K. Dwivedi

Keyword(s):

Rare Earth ◽

Erosive Wear ◽

Rare Earth Oxide ◽

Wear Performance ◽

Ceramic Phase ◽

Enhanced Dissolution ◽

Impact Angles ◽

Rare Earth Doped ◽

Microstructural Examination ◽

Nickel Tungsten

The effect of CeO2 modification on flame sprayed nickel-tungsten carbide (WC) coatings was investigated. The modified coatings exhibited smaller grain sizes of the ceramic phase due to enhanced dissolution of the WC phase. The rare earth doped coatings, especially Ni-WC +0.9% wt. CeO2, showed superior abrasive wear resistance with respect to the unmodified coating mainly due to enhanced hardness. Coating modified with 0.6% wt. CeO2 demonstrated superior erosion resistance at both impact angles, 30 deg and 90 deg, respectively, primarily due to low porosity levels. Microstructural examination showed different wear mechanisms in conventional and doped coatings.

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Potentiostatic etching of duplex stainless steels and high chromium white cast irons

Materials Science and Technology ◽

10.1179/mst.1993.9.4.336 ◽

1993 ◽

Vol 9 (4) ◽

pp. 336-342 ◽

Cited By ~ 2

Author(s):

J. H. Potgieter ◽

P. de Visser

Keyword(s):

Stainless Steels ◽

Duplex Stainless Steels ◽

Cast Irons ◽

High Chromium

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