Exploring the influence of the casting process, structural components and heat treatment on the mechanical properties of high-chromium cast irons: A review

Khamroev, Nurbek; Egamberdiev, Ilkhom; Ashurov, Khisrav; Asatov, Sunnatullo; Khamidov, Boburjon

doi:10.1063/5.0241423

AIP Conference Proceedings

2024

DOI: 10.1063/5.0241423

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Exploring the influence of the casting process, structural components and heat treatment on the mechanical properties of high-chromium cast irons: A review

Nurbek Khamroev,

Ilkhom Egamberdiev,

Khisrav Ashurov

et al.

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2024

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Effect of Heat Treatment on the Corrosion Behavior of Weld-Deposited Chromium Carbide-Based Hardfacing Alloys

Tan,

Krishnan,

Elumalai

2024

Metals

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The effects of heat treatment on the microstructure and corrosion behavior of chromium carbide-based hardfacing alloys deposited via gas metal arc welding were investigated. The hardfacing alloy, high chromium white iron (HCWI), containing 27 wt% Cr and 4.8 wt% C, was heat treated at 650 °C and 950 °C for six hours followed by natural cooling to room temperature. Microstructural characterization revealed that heat treatment promoted the transformation of austenite to ferrite and increased carbide precipitation. X-ray diffraction analysis identified the primary carbides as Cr7C3, which remained stable during heat treatment. Electrochemical corrosion testing in artificial seawater, including potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), demonstrated progressively improved corrosion resistance with heat treatment temperature. Both techniques confirmed that the specimen treated at 950 °C exhibited superior corrosion resistance compared to the 650 °C treatment and as-deposited condition, with the specimen treated at 950 °C exhibiting the highest charge transfer resistance (4711 Ω·cm2) compared to the 650 °C treatment (2608 Ω·cm2) and as-deposited condition (374.6 Ω·cm2). The enhanced corrosion resistance was attributed to the increased carbide precipitation and optimization of the matrix composition. While heat treatment at both temperatures improved corrosion performance, the 950 °C treatment yielded superior results, suggesting this could be an optimal temperature for enhancing the corrosion resistance of chromium carbide-based hardfacing alloys.

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Effect of Heat Treatment on the Corrosion Behavior of Weld-Deposited Chromium Carbide-Based Hardfacing Alloys

Tan,

Krishnan,

Elumalai

2024

Metals

View full text Add to dashboard Cite

show abstract

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Exploring the influence of the casting process, structural components and heat treatment on the mechanical properties of high-chromium cast irons: A review

Cited by 1 publication

References 28 publications

Effect of Heat Treatment on the Corrosion Behavior of Weld-Deposited Chromium Carbide-Based Hardfacing Alloys

Effect of Heat Treatment on the Corrosion Behavior of Weld-Deposited Chromium Carbide-Based Hardfacing Alloys

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