Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Imurai, Suttawan; Thanachayanont, Chanchana; Pearce, J.T.H.; Chairuangsri, Torranin

doi:10.1515/amm-2015-0230

Cited by 18 publications

(3 citation statements)

References 15 publications

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“…Research on the influence of Mo on erosion-corrosion of as-cast HCWCIs in a sulfuric acid slurry with alumina particles was performed by Imurai et al [139], and it was shown that erosion-corrosion resistance improves with an increase in Mo content. This was due to both the appearance of harder eutectic M 2 C instead of the typical M 7 C 3 carbides and the presence of adequate Mo in the matrix for corrosion protection.…”

Section: Molybdenum and Tungstenmentioning

confidence: 99%

Development and Performance of High Chromium White Cast Irons (HCWCIs) for Wear–Corrosive Environments: A Critical Review

Fashu,

Trabadelo

2023

Metals

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There is a huge demand for high-performance materials in extreme environments involving wear and corrosion. High chromium white cast irons (HCWCIs) display better performance than many materials since they are of sufficient hardness for wear protection and can be tailored in chemical compositions to improve corrosion resistance; however, their performance is often still inadequate. This article reviews the chemical composition and microstructure design aspects employed to tailor and develop HCWCIs with combined corrosion and wear resistance. The performance of these alloys under wear and corrosion is reviewed to highlight the influence of these parameters in the industry. Existing challenges and future opportunities, mainly focusing on metallurgical alloy development aspects like chemical composition, casting, and heat treatment design, are highlighted. This is followed by suggestions for potential developments in HCWCIs to improve the performance of materials in these aggressive environments. Many variables are involved in the design to obtain suitable microstructures and matrix composition for wear–corrosion resistance. Computational modeling is a promising approach for optimizing multi-design variables; however, reliable field performance data of HCWCIs in wear–corrosion environments are still inadequate. Quantitative evaluation of the wear–corrosion performance of HCWCIs requires the development of laboratory and field tests using standard conditions like abrasive type and sizes, severity of loading, slurry velocity, pH, and temperature to develop wear–corrosion maps to guide alloy development.

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Section: Molybdenum and Tungstenmentioning

confidence: 99%

Development and Performance of High Chromium White Cast Irons (HCWCIs) for Wear–Corrosive Environments: A Critical Review

Fashu,

Trabadelo

2023

Metals

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“…As a third-generation wear-resistant cast iron, high chromium cast iron (HCCI) has an outstanding performance with the combination of the hard M 7 C 3 carbides and the tough matrix [1][2][3]. The volume fraction of carbides, their type, morphology, orientation, and the properties of the matrix are the vital factors to control the wear resistance of HCCI [3][4][5][6][7][8]. As such, the wear resistance of the alloy can be significantly improved by adding alloying elements (like W, B, Mo, Ti), but the numerous inevitable chrysanthemum-like carbides with sharp edges in normal cast HCCI always become the pores and stress concentration raisers, which deteriorates its toughness [9,10].…”

Section: Introductionmentioning

confidence: 99%

Fixed and Variable Temperature Super-Solidus Liquid Phase Sintering of High Chromium Cast Iron with 25 Wt.%CR and Its Microstructure

Xiao

et al. 2021

Metals

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A variable temperature super-solidus liquid phase sintering (SLPS) technique is employed in fabrication of high chromium cast iron (HCCI) with 25wt.%Cr to extend its sintering temperature window. Its microstructure evolution, mechanical properties, and abrasive wear behavior are investigated systemically. The results indicate that the variable temperature SLPS can obtain samples with full density plus fine and uniformly distributed carbide particles, and its carbide volume fraction is increased by 4~5% in comparison with the fixed temperature SLPSed one. Meanwhile, its bending strength and impact toughness can be raised by 8.0% and 16.7%, respectively. Finally, the sintering temperature window for variable temperature SLPS of HCCI is extended by 12 °C, reaching 27 °C.

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“…M 7 C 3 [6] and its appearance might have a significant effect on the mechanical and physicochemical properties. Imurai et al [14] showed that in 28 wt% chromium, hypoeutectic irons containing 0 to 10 wt% molybdenum the reduction of the carbide-matrix hardness difference, the increase of macro-hardness, and the increase of matrix corrosion resistance affect on improving erosion-corrosion resistance. Studies on the type and morphology characterization of the eutectic carbides in Fe-Cr-C alloys are important from the point of view of manufacturing and design of new materials based on this system.…”

Section: Introductionmentioning

confidence: 99%

Crystallography and Morphology of Chromium Rich Eutectic Carbides in an As-Cast Fe-Cr-C Alloy Crystallized in Non-Equilibrium Conditions

et al. 2016

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The crystallography and microstructure of eutectic carbides crystallizing in non-equilibrium conditions in hypoeutectic Fe24Cr0.8C have been studied by light microscopy, scanning electron microscopy, and transmission electron microscopy. The alloy was synthesized in an arc furnace in high purity argon atmosphere and crystallized on water-cooled copper mould. Greater thermal gradient in regions close to water-cooled, copper mould in comparison with top of the ingot gives a formation of eutectic carbides with two morphologies: large polygonal carbides and surrounding them much smaller, plate-like carbides instead of rod-like carbides, observed in top of the ingot. There was no evidence for influence of non-equilibrium crystallization to the formation of types of carbides different than M23C6.

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Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry

Cited by 18 publications

References 15 publications

Development and Performance of High Chromium White Cast Irons (HCWCIs) for Wear–Corrosive Environments: A Critical Review

Development and Performance of High Chromium White Cast Irons (HCWCIs) for Wear–Corrosive Environments: A Critical Review

Fixed and Variable Temperature Super-Solidus Liquid Phase Sintering of High Chromium Cast Iron with 25 Wt.%CR and Its Microstructure

Crystallography and Morphology of Chromium Rich Eutectic Carbides in an As-Cast Fe-Cr-C Alloy Crystallized in Non-Equilibrium Conditions

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