Evaluation of sustainability of mould steels based on machinability data

In this study, a new model was proposed for the Product Sustainability Index (PSI). The PSI estimation was based on the tool life, the cutting force, the surface finish, the energy consumption, the operation cost and the acoustic emissions. The PSI of four mould steels (SF-2312 [300 HB], SF-5 [300 HB], SF-2000 [341 HB] and SP-300 [341 HB]) was evaluated using the developed model and machinability data from dry and wet cutting tests. The model was able to predict the PSI of the considered mould steels at different cutting speeds, and the predicted results were in good agreement with the experimental measurements. The PSI was found to be dependent on lubrication mode, cutting speed and workpiece hardness. Steels with similar composition but different hardness exhibits different PSI.

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