Abstract
Microstructures of as-cast 2.17%C–16.23%Cr high chromium white cast iron(HCWCI) alloyed with 1.03%V–0.1%B–1.45%Si are studied. The constituents of the as-cast microstructure include \({\text{M}}_{7} {\text{C}}_{3}\) chromium rich eutectic carbides, globular boro-carbides and austenite dendrite matrix. The equilibrium phase diagram calculation for the alloy composition is performed with ThermoCalC software using TCFE9 database. The alloy sample is heat-treated in different heat treatment conditions and the microstructures are studied. The precipitation of secondary boro-carbides has increased in both normalized and quenched and tempered sample. Although the matrix microstructure in the normalized sample remains austenite, the matrix microstructure of quenched and tempered sample has mostly become martensitic with needle-like microstructure. The hardness of the quenched and tempered sample has increased to 52HRC from 45 HRC in the as-cast condition. The normalized sample despite of showing a very small improvement in its hardness compared to as-cast condition, it has shown the highest resistance to sliding wear.
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Acknowledgements
The authors would like to thank the Tripura University, Agartala, India for permitting to use the field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectroscopy(EDS) facility available in the “Central Instrumentation Centre” of the university.
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Sarma, M.J., Das, P.K. Effect of Heat Treatment on Microstructure and Mechanical Properties of Fe–C–Cr–V–B–Si Alloy. Trans Indian Inst Met 76, 3323–3331 (2023). https://doi.org/10.1007/s12666-023-03003-2
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DOI: https://doi.org/10.1007/s12666-023-03003-2