Каталог Sumitomo пластины с кубическим нитридом бора Sumiboron - страница 7

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SUMIBORON/Coated SUMIBORON K Cast Iron Guidance for SUMIBORON Grades ● Advantages of using CBN CAST IRON MACHINING Following chart shows advantages of using CBN in cast iron machining compared with conventional tool, such as carbide, cermet or ceramics. SUMIBORON has longer tool life than conventional tools in high speed machining and brings higher efficiency and superior precision. High Speed Machining High Speed Machining High Precision Machining Gray Cast Iron Ductile Cast Iron BNS800 500 Cutting Speed vC(m/min) 1,000 BN7000 Cutting Speed vC(m/min) BNX10 Ceramic Tolerance BN500 BNS800 Coated carbide BN7000 Cermet BNC500 BNC500 500 200 Ceramic BN7000 200 Coated carbide Good← Ceramic Coated carbide Cermet Cermet 1 10 20 1 10 0.4 0.8 1.6 3.2 Tool Life Tool Life Good← Surface Roughness Ra (μm) ■ Recommended Grade Grade Binder CBN Content（%） Grain Size（μm） Hardness（GPa） TRS（GPa） Coating Thickness（μm） Characteristics Grade with 100% solid CBN structure BNS800 AI Compound 85 to 90 8 39 to 42 0.95 to 1.10 ̶ ̶ and excellent thermal shock resistance. Uncoated Exhibits improved wear and fracture BN7000 Co Compound 90 to 95 2 41 to 44 1.30 to 1.40 ̶ ̶ resistance in cutting of cast iron and exotic alloys. Optimized for cast iron cutting. BN500 TiC 65 to 70 6 32 to 34 1.00 to 1.10 ̶ ̶ Provides superior wear and fracture resistance. Suitable for machining of hard-to-cut Coated BNC500 TiC 60 to 65 4 32 to 34 1.00 to 1.10 TiAIN 2 cast iron thanks to the highly wear- (Ductile Cast Iron) resistant substrate and coating. * Refer to pages L9 and L10 for machining of sintered components, rolls, hard facing alloys and heat resistive alloys. ■ Application Range Finishing 2,000 500 Roughing Cutting Speed (m/min) Cutting Speed (m/min) 1,500 400 BN7000 BNC500 1,000 300 BNS800 500 BN500 200 AC405K / AC415K / AC420K BN7000 L SUMIBORON 0 0 1.0 2.0 3.0 4.0 0.1 0.2 0.3 0.4 0.5 Depth of Cut (mm) Depth of Cut (mm) Hardness Cutting Speed (m/min) Work Structure Examples (HB) 100 200 300 350 400 500 Ni-resist 150 Cast Iron to Austenite Piston ring BNC500 200 250 High-Cr Cast Iron to Austenite Pump parts BNS800 350 400 Engine block FCV (CGI) to Pearlite Cylinder head BNC500 580 Disc brakes L7