Общий каталог Sumitomo 2019 - 2020 - страница 1052

SUMIBORON Cutting Speed vc (m/min) Cutting Speed vc (m/min) SUMIBORON Binderless NCB100 Cast Iron Exotic Alloy Carbide Hard BrittleMaterial Nano-Polycrystalline CBN ■ General Features SUMIBORON Binderless, which does not contain any binders, is a CBN sintered product with directly and strongly bonded nano- to sub-micron CBN particles. Compared to conventional CBN grades, this provides high L hardness and thermal conductivity, making it highly efficient with a long tool life when machining exotic alloys such as titanium alloys and cobalt-chrome alloys. ■ Sintered Composition (SEM Image) ■ Physical Values SUMIBORON Conventional Binderless CBN Metal binder CBN Content (vol%) 100 90 to 95 Binder ̶ WC-Co CBN Particles CBN Particles200 to 500nm 500nm 1 to 5μm 3μm Hardness Hv (GPa) 51 to 54 41 to 44 SUMIBORON Binderless Conventional CBN Thermal Conductivity (W/m·K) 180 to 200 100 to 120 SUMIBORON Binderless NCB100 ■ General Features Adopts a nano-polycrystalline CBN sintered cutting edge with hardness and thermal conductivity significantly higher than conventional sintered CBN. Enables overwhelmingly longer tool life and improved efficiency and machining accuracy when machining exotic alloys such as titanium alloys or cobalt-chrome alloys. ■ Features ● Ideal for high efficiency finishing of exotic alloys such as titanium alloys and cobalt-chrome alloys Exhibits outstanding wear resistance due to the excellent hardness and thermal conductivity of nano-polycrystalline CBN ● Excellent dimensional tolerance and machined surface roughness maintained for extended periods Tool replacement count can be drastically reduced compared to conventional grades, enabling work efficiency to be improved and total costs to be reduced ■ Application Range (Machining Titanium Alloy) ■ Application Range (Cobalt-chrome alloy machining) 300 300 200 200 100 NCB100 100 NCB100 0 0 0.05 0.10 0.15 0.20 0.05 0.10 0.15 0.20 Feed Rate f (mm/rev) Feed Rate f (mm/rev) L22