Machinability of calcium-treated steels using TiN-coated high-speed steel tools

A new approach for the characterization of machinability—application to steels for plastic injection molds

“…Steel-makers attempt to control the inclusions rates and morphologies for improving the machinability of these steels in term of tool-life [3][4][5][6][7][8][9][10][11][12][13][14][15]. Sulfide inclusions are known to protect the tool in turning operations by fragmenting the chip and creating an adherent layer of MnS on the cutting edge.…”