Abstract
High-silicon cast steel exhibits good ductility and mechanical strength after microstructure transformation through an austempering heat treatment. The combination of these properties is outstanding in other steels, leading to emerging applications for high-silicon cast steel, such as in the railway sector. The Si content above 1.5% is a crucial factor for the formation of refined bainite and a dispersion of carbides in the matrix. This work involves the evaluation of the machinability of a steel alloy with 0.77% C and 1.77% Si using ceramic metal and ceramic tools. The alloy was cast, homogenized, austempered, and tempered. Subsequently, the high-silicon cast steel was characterized using scanning electron microscopy (SEM), hardness, tensile strength, and elongation. Machinability tests were conducted by turning and varying the cutting speed under dry cutting conditions with a constant feed rate. The analyzed output parameters were surface roughness, tool wear, and wear mechanisms. The increase in cutting speed directly influenced tool wear for all tools. The predominant wear mechanisms observed during the tests were abrasion and diffusion. The hard metal tool exhibited chipping on the cutting edge.
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Acknowledgements
This work was conducted with the support of the Federal Centre of Technological Education of Minas Gerais (CEFET-MG), SENAI Itaúna CETEF Marcelino Corradi and Sandvik Coromant.
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Caio César was responsible for the conceptualization, experimental work, and writing of the manuscript. Ernane Felipe was contributed to experimental work. Denilson José and Sandro Cardoso were responsible for the revision of the manuscript and contributed to the technical discussion of the results. Sandro Cardoso was responsible for the supervision of the work and the availability of resources.
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Barroso, C.C.G.C., Dias, E.F., do Carmo, D.J. et al. Characterization and machinability of a high-silicon cast steel with ceramic and carbide tools. Int J Adv Manuf Technol 132, 167–178 (2024). https://doi.org/10.1007/s00170-024-13206-6
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DOI: https://doi.org/10.1007/s00170-024-13206-6