TBM disc cutters, also called TBM roller cutters, roller disc cutters, TBM cutter tools, are arranged on the TBM cutter-head in a certain pattern to bore soil and/or rock. TBM disc cutters may be exposed in slurry, soft ground, mixed ground and hard rock during excavation. The varied and harsh geology require TBM disc cutters to have high wear resistance, toughness, sealing ability and long lifetime.