SUMIBORON / Coated SUMIBORON Grade Guidance
Hardened Steel
HARDENED STEEL MACHINING
● Advantages of CBN - SUMIBORON for hardened steel cutting Below is an analysis of the use of CBN compared to grinding. In terms of cost, not only is the investment involved for introducing new machinery reduced, it is possible to shorten the processing cycle time by finishing complicated shapes in one run. In terms of quality, machining with a single chuck is possible, improving machining accuracy and squareness. Furthermore, dry machining is possible, with various advantages such as better global environmental conservation and resource recycling. The workpieces shown in the table to the lower right have shapes more likely to benefit from being cut, especially compared to grinding.
Machining Versatility with CBN
Advantages
Remarks
L
Facility investment is low
· Cheaper machines · Reduced processes · Improved machining efficiency with less machining required
Cost
Complex finishing in a single set-up
Taper Machining
Internal (Profile) Boring
Grooving / Profiling
Improved precision
FF
FF
FF
Quality
Sludge management → Chip control
Environmentally- friendly
Environment
(Recyclable)
Recommended Grade
Grade
Binder CBN Content (%) Grain Size (μm) Hardness HV (GPa) Transverse Rupture Strength (GPa) Main Coating Components Coating Thickness (μm)
Features
TiCN Multiple Layers TiAlN Multiple Layers
Improves the wear resistance of coating and substrate and stably achieves excellent surface roughness.
BNC2010
TiCN 50 to 55
2
30 to 32
1.1 to 1.2
1.5
Combination of a tough substrate with a wear-resistant and adhesive coating layer to achieve general purpose to high-efficiency machining with long tool life Suitable for finishing work materials combining continuous and interrupted cutting. Suitable for high-speed finishing thanks to highly wear-resistant coating.
BNC2020
TiN 70 to 75
5
34 to 36
1.4 to 1.5
1.5
BNC300
TiN 60 to 65
1
33 to 35
1.5 to 1.6
TiAIN
1
TiAIN / TiCN TiAIN / TiCN
BNC100
TiN 40 to 45
1
29 to 32
1.0 to 1.1
2
BNC160
TiN 60 to 65
3
31 to 33
1.2 to 1.3
2
Achieves stable, high-precision finishing of hardened steel.
Provides long tool life thanks to a tough substrate and highly wear-resistant coating. Achieves ultimate wear and fracture resistance. Suitable for high- speed cutting. General-purpose grade for hardened steel machining with a high degree of fracture and wear resistance. Achieves excellent crater wear resistance. Suitable for high-efficiency cutting under high-temperature conditions. Achieves ultimate cutting edge strength. Suitable for heavy interrupted cutting. Excellent wear resistance. Suited to continuous high-speed cutting. Exhibits superior fracture resistance in high-speed cutting. Suitable for high-speed interrupted cutting of hardened steel.
BNC200
TiN 65 to 70
4
33 to 35
1.4 to 1.5
TiAIN
2
Q Q
BN1000
TiCN 40 to 45
1
27 to 31
0.9 to 1.0
Q Q
BN2000
TiN 50 to 55
2
31 to 34
1.1 to 1.2
Q Q
BNX20
TiN 55 to 60
3
31 to 33
1.0 to 1.1
Q Q
BN350
TiN 60 to 65
1
33 to 35
1.5 to 1.6
Q Q
BNX10
TiCN 40 to 45
3
27 to 31
0.9 to 1.0
Q Q
BNX25
TiN 65 to 70
4
29 to 31
1.0 to 1.1
Transverse rupture strength measured with test piece equivalent to insert CBN layer.
Application Range
Conditions
Cutting Speed v C (SFM)
1000
650
330
Applications
● Hardened Steel Machining
BNC2020
BNC2010
General-purpose Rz = 3.2 or more ( ) Continuous to light interrupted
Coated CBN SUMIBORON
BNC200
BNC100
Uncoated CBN SUMIBORON Coated CBN SUMIBORON Uncoated SUMIBORON
BN2000
BNX20 BN1000 / BNX10
Coated Cermet
BNC300
SUMIBORON
Medium to Heavy Interrupted
BN350
BNX25
Ceramics
BNC2010
Coated CBN SUMIBORON
High Precision (Rz = 1.6 to 3.2)
BNC160
40 45 50 55 60 Hardness of work material (HRC) 65
Uncoated CBN SUMIBORON
BN2000
BNC2020
High Efficiency (Carburised layer removal)
Coated CBN SUMIBORON
BNC200
L4
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