Каталог Sumitomo пластины с кубическим нитридом бора Sumiboron - страница 9

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SUMIBORON/Coated SUMIBORON Sintered Alloy Guidance for SUMIBORON Grades ● Advantages of Sintered Component machining with SUMIBORON SINTERED COMPONENT As compared to carbide or cermet, edge wear is very small for SUMIBORON, which also has better wear resistance and can be form to a sharp edge easily. MACHINING Good machining precision and surface finish can be achieved because SUMIBORON is able to prevent burrs and chipping on the edges of the workpiece. Sintered Alloy ■ Recommended Grade ● General Sintered Alloy ● High Density/Hardened Sintered Alloy General Sintered Alloy (50-90HRB) High Density / Hardened Sintered Alloy (30-65HRC) Finishing Region Roughing Finishing Roughing 300 Region 300 Region Region Cutting Speed Vc (m/min) Cutting Speed vC(m/min) 200 200 BN7500 100 BN7000 100 BN7500 BN7000 Depth of Cut ap (mm) 0 0.1 0.2 0.3 0.4 0.5 Depth of Cut ap (mm) 0 0.1 0.2 0.3 0.4 0.5 Feed Rate f (mm/rev) 0.05 0.1 0.15 0.2 0.25 0.3 Feed Rate f (mm/rev) 0.05 0.1 0.15 0.2 0.25 0.3 Grade Binder CBN Content（%） Grain Size（μm） Hardness（GPa） TRS（GPa） Coating Thickness（μm） Characteristics Maintains excellent cutting edge sharpness. BN7500 Co Compound 90 to 95 1 41 to 44 1.40 to 1.50 ̶ ̶ Suitable for finishing of sintered alloys. Exhibits improved wear and fracture resistance BN7000 Co Compound 90 to 95 2 41 to 44 1.30 to 1.40 ̶ ̶ in roughing of sintered materials. ■ Cutting Performance ● Grade Performance Comparison D SUMIBORON ■ Carbide D Cermet D ■ Surface Roughness, Rz (μm) 0.7 12 ■ 0.5 ■ Max. height of burr (mm) Flank Wear Width (mm) 10 0.6 D D ■ 0.4 0.5 D 8 D D 0.3 0.4 6 D D D D 0.3 0.2 4 D D D ■ D D D D D 0.2 ■ ■ D 2 0.1 D 0.1 ■ ■ D D D D 0 50 100 150 200 0 50 100 150 200 0 50 100 150 200 Cutting Speed (m/min) Cutting Speed (m/min) Cutting Speed (m/min) Work Material: SMF4040 equivalent For general sintered alloy, carbide and cermet can perform up to Process details: ø80-ø100mm heavy interrupted facing with grooves and vc=100m/min. But around vc=120m/min, wear growth becomes rapid and drilled holes. (after 40 passes) surface roughness deteriorates with increased burrs. On the other hand, Insert: TNGA160404 SUMIBORON exhibits stability and superior wear resistance, burr Cutting Conditions: f=0.1mm/rev, ap=0.1mm, Wet prevention and surface roughness especially at high speeds. Valve Seat Ring (VSR) ■ Recommended Grade ● Grade Performance Comparision * VSR has both (Intake: IN) and (Exhaust: EX) with the exhaust being hardened. ■ Recommended Cutting Conditions L SUMIBORON Gasoline VSR material Diesel VSR material Cutting Speed Feed Rate Depth of Cut BN7000 BN7000 vc (m/min) f (mm/rev) ap (mm) Plunge cut BN350 BN350 BN7500 BN7500 50 to 125 0.03 to 0.2 0.05 to 0.5 Traverse cut BN7000 BN500 BN7000 BN500 BN7500 BN7500 Hardness (HV) low 300HV high low 300HV high ■ Application Examples With superior fracture resistance, BN7000 can achieve double of competitor's tool life Work Material:Sintered alloy Insert : TBGN060104B (150-250HV) BN7000 BN7000 3,200pcs Process: VSR(IN) Cutting Conditions:vc=100m/min 45° Surface Finishing f=0.08mm/rev Comp 800pcs Wet CBN L9