Page 8 - CBN_2018
P. 8

Hard Part Turning


       CBN INSERTS  hard part turning
                Why carbide inserts are unsuitable for



                It  is inadvisable to use carbide inserts for hard
                part turning (HPT) due to low chemical stability
                between carbide and the hard materials.
                The high pressure and high temperatures
                generated during HPT cause rapid wear and
                short tool life for the carbide insert.

















                Wear Development





                  Crater
                  wear








                  Flank
                  wear







                Why use PCBN on hardened materials

              •  Excellent wear resistance
              •  High toughness
              •  Suitable for highest surface finish demands
              •  Maintains close tolerances
              •  Can replace grinding operations, which
                reduces machining cost
              •  Semi finishing - super finishing
                (Depth of cut less than 0.8 mm)












     8      ISCAR
   3   4   5   6   7   8   9   10   11   12   13