Abstract
Sandwich-structured three-layered ceramic inserts were made with the aim of obtaining ceramic cutting tools with an increased useful life.
Alumina was chosen for the external layers because of its high hardness and chemical inertness. Mixtures of Al2O3 and tetragonal ZrO2 were used for the inner layer since it is possible to predetermine the tensile stresses on the rake faces by varying the ratio between the two oxides of the inner layer. The fired compacts were machined in order to obtain cutting tools with the desired geometrical dimensions. Tests were performed by cutting an AISI 1040 steel at speeds ranging from 1.7 to 7.8 m/s. The performances of three-layered composites were similar to those of monolithic Al2O3-ZrO2 commercial inserts. In particular, the prestressed layered ceramics exclude the “chipping” caused by metal infiltration during, and by thermal stresses after, cutting. Scanning electron microscope investigation of the used inserts confirmed that all wear mechanisms can be related to Al2O3 plastic deformation during turning tests.
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© 1999 Springer-Verlag Wien
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Casto, S.L., Ruisi, V.F., Lucchini, E., Sbaizero, O., Maschio, S. (1999). Performances of Three Layered Ceramic Composites Inserts for Steel Cutting. In: Kuljanic, E. (eds) AMST ’99. International Centre for Mechanical Sciences, vol 406. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2508-3_14
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DOI: https://doi.org/10.1007/978-3-7091-2508-3_14
Publisher Name: Springer, Vienna
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