CBN
High hardness and thermal resistance for machining hardened steel and hard cast iron. High-speed finishing of gray cast iron with long tool life is also possible. In 1977, Sumitomo Electric Hardmetal successfully developed a revolutionary CBN sintered tool called SUMIBORON . The main component in SUMIBORON is cubic boron nitride with a special ceramic binder sintered under super high pressure and temperature. Compared to other conventional tool materials, CBN has higher hardness and excellent thermal resistance. With these distinct characteristics, SUMIBORON can perform machining of hardened steel, hard cast iron and exotic alloys which was previously only done by grinding. Excellent efficiency and longer tool life can also be achieved from high-speed finishing of cast iron. ® ® ®
Features
A
Structure Features
Structure
Grade
Work Materials/Applications
Features
CBN Content Hardness (GPa)
・ ・
・ ・ Containing no binder, the nano-to sub-micron CBN particles have a directly bonded structure The high hardness and thermal conductivity make it highly efficient with a long tool life when machining exotic alloys such as titanium alloys and Co-Cr alloys High CBN content. Structure consists of strongly fused CBN grains Suited to cutting cast iron, heat-resistant alloy, cemented carbide and other high-hardness materials ・ ・ CBN grains are fused together strongly with a special ceramic binder Strong CBN binding provides superior wear resistance and toughness when cutting hardened steel and cast iron
Cast Iron, Titanium Alloy, Pure Titanium, Co-Cr Alloy, Cemented Carbide, Cermet Cemented Carbide, Chilled Cast Iron, Ni-Hard Cast, Iron, Sintered Ferrous Alloy, Heat-resistant Alloy, Cast Iron, Sintered Ferrous Alloy Alloy Steel, Case Hardened Steel, Carbon Tool Steel, Bearing Steel, Die Steel, Ductile Cast Iron
Purely CBN particles, firmly bonded
High
54
NCB100
BN700 BN7000 BN7500 BNS800
Mainly CBN grains fused together
BN1000/BN2000/BN350 BNX10/BNX20/BNX25 BN500/BNC2010/BNC2020 BNC300/BNC100/BNC160 BNC200/BNC500
Mainly CBN grains held together with a binder
Low
27
Grade Map
Part Material
Application
High-speed Cutting Finishing to Light Cutting
Medium Cutting
Rough to Heavy Cutting
−
H01
H10
H20
H30
Classification
BNC2010
BNC2020
BNC300
Coated SUMIBORON
®
BNC100
BNC160
BNC200
Hardened Steel
BN1000
Uncoated SUMIBORON
BN2000
®
BNX10
BNX20
BNX25,BN350
−
01
10
20
30
Classification
Sintered Alloy
BN7500
Uncoated SUMIBORON
®
BN7000
−
K01
K10
K20
K30
Classification
Coated SUMIBORON
BNC500 *
®
NCB100
Cast Iron
BN500
Uncoated SUMIBORON
®
BN7000
BNS800
−
S01
S10
S20
S30
Classification
NCB100
Uncoated SUMIBORON
BN7000
Exotic Alloy
®
BNS800
A32
* Dedicated for Ductile Cast Iron
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