SUMIBORON / Coated SUMIBORON CBN Grade Guidance
Cast Iron
CAST IRON MACHINING
● Advantages of machining cast iron with CBN - SUMIBORON Compared with conventional tools, a longer tool life for high speed machining is acheived. In addition, machining efficiency is improved along with consistently better wear resistance, a sharper edge, excellent surface roughness and dimensional tolerance. CBN - SUMIBORON is ideal for finishing of gray cast iron and ductile cast iron and heat-treated high-grade cast iron such as ADI.
High-speed Machining
High-speed Machining
High-precision Machining
● Gray Cast Iron
● Ductile Cast Iron
L
1,650
BNS800 BN7000 BN500
3,300
Ceramics Coated carbide Cermet
BNX10
BNS800 BN7000 BNC500
BNC500
1,650
650
Ceramics Coated carbide Cermet
↓
BN7000
650
Ceramics Coated carbide Cermet
0.4 0.8 1.6 3.2
1
10
20
10 Tool Life Ratio
1
Good ←
Tool Life Ratio
Surface Roughness Standard Ra (μm)
Recommended Grade
Grade
Binder CBN Content (%) Grain Size (μm) Hardness HV (GPa) Transverse Rupture Strength (GPa) Main Coating Components Coating Thickness (μm)
Features
100% solid CBN structure and excellent thermal shock resistance.
Q Q
BNS800
Al Alloy
85 to 90
8
39 to 42
0.9 to 1.1
Exhibits wear and fracture resistance in cutting of cast iron and exotic alloys. Grade optimised for cast iron cutting. Provides superior wear and fracture resistance. Suitable for machining of hard-to-cut cast iron thanks to the highly wear- resistant substrate and coating.
Co Compound
Q Q
BN7000
90 to 95
2
41 to 44
1.8 to 1.9
Q Q
BN500
TiC 65 to 70
6
32 to 34
1.0 to 1.1
BNC500 (For Ductile Cast Iron)
TiC 60 to 65
4
32 to 34
1.1 to 1.2
TiAIN
2
Transverse rupture strength measured with test piece equivalent to insert CBN layer. Refer to pages L9 and L10 for machining of sintered components, rolls, hard facing alloys and heat-resistant alloys.
Application Range
● Gray Cast Iron
● Ductile Cast Iron
Finishing region
6,600
1,650
Roughing region
5,000
1,300
BN7000
BNC500
3,300
1000
BNS800
1,650
650
BN500
BN7000
0
0
.039 .079 .118
.157
.0039
.0079
.0118
.0157
.0197
Depth of Cut
p (inch)
a
Depth of Cut a
p (inch)
● Special Cast Iron
Cutting Speed v C (SFM)
Hardness (HB)
Part Material Structure
Part Material
Examples
330
650
1000 1,150
1,300
1,650
150 200 to 250 350 to 400 580 to
Ni-resistant Cast Iron
BNC500
Austenite
Piston ring
High-Cr Cast Iron
BNS800
Austenite
Pump part
Engine blocks Cylinder heads Brake discs
FCV (CGI)
BNC500
Pearlite
L7
Made with FlippingBook Ebook Creator