Polycrystalline
Diamond Composite (PDC)
Is composed of a polycrystalline diamond layer and a tungsten
carbide layer. The polycrystalline layer possesses extremely high
hardness and abrasion resistance, whereas the tungsten carbide
substrate would greatly improve the malleability and weld ability
of the whole composite, when applied to petroleum and geology
drilling bits, as well as machine tooling, and show excellent
comprehensive properites.
 |
PCD Layer Height: 0.5 ~ 0.8mm
Tolerance
Diameter: ¡À0.03mm
Height: ¡À0.1mm
Height of PCD/PCBN layer: ¡À0.05mm
Perpendicularity: ¡À0.04mm
Parallelism: ¡À0.04mm |
Physical properties of various cutting tool materials
| |
Tungsten carbide |
PCD |
MONODITE |
| Density [g/cm3] |
14.7 |
4.12 |
3.52 |
| Knoop hardness [GPa] |
17 |
50 |
57 to 104 |
| Young's modulus [GPa] |
593 |
841 |
1141 |
| Compressive strength [GPa] |
4.438 |
7.60 |
8.68 |
| Fracture toughness [MPam1/2] |
10.48 |
8.81 |
3.40 |
| Bending strength [MPa] |
1634 |
1256 |
/ |
| Coefficient of thermal |
|
|
|
| expansion [10-6K-1] |
5.4 |
4.2 |
1.5 to 4.8 |
| Thermal conductivity [Wm-1K-1] |
100 |
560 |
500 to 2000 |
1, PDC be used for drilling and coring bits
For drilling rocks of soft to medium hardness, widely used in
geoexploration, oil/coal recovery, etc.
Specification (mm) |
D(mm) |
19.00 |
19.00 |
19.00 |
16.00 |
16.00 |
13.44 |
13.44 |
13.30 |
10.00 |
8.00 |
8.00 |
8.00 |
H(mm) |
13.00 |
8.00 |
5.00 |
8.00 |
4.50 |
13.00 |
8.00 |
4.50 |
8.00 |
11.00 |
8.00 |
3.53 |
2, PDC be used for cutting tools
For machining aluminum alloys,copper,brass and some other nonferrous
metals; Machining plastics,rubbers; Machining ceramics,tungsten
carbide,glass; Machining wood,fibreboard.
1, Round Series |
¡¡  |
D(mm) |
19.00 |
16.00 |
13.20 |
12.70 |
9.52 |
H(mm) |
1.60 or 3.18 |
2, Sector Series |
¡¡  |
L(mm) |
7.5 |
6.5 |
4.5 |
3.5 |
H(mm) |
1.60 or 3.18 |
Angle (a¡ã) |
45/ 60/ 90/ 180¡ã |
3, Triangle Series |
¡¡  |
L(mm) |
7.5 |
7.1 |
5.0 |
3.8 |
H(mm) |
1.6 or 3.18 |
Angle (a¡ã) |
60/ 90¡ã |
4, Rectangle Series |
¡¡  |
L(mm) |
8.0 |
7.5 |
5.0 |
40 |
3.0 |
W(mm) |
6.0 |
2.0 |
4.0 |
2.5 |
1.0 |
H(mm) |
1.6 or 3.18 |
|
|
BSI:9001:2000 Hold certificate no:FS518717 
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