Sandvik Coromant Machining carbon fibre materials - Manual (Page 28)

Machining mechanism
Composites: • brittle fracture
The fibres are shattered and cut •
- The force needed is much lower
- The tool toughness can be lower
- Coolant or lubricant are often not necessary
On the other hand, fibre • hardness is extremely high
- Highly abrasive
Resins are weak •
- Interlayer fracture → delamination
- Elastic mismatch → irregular surface
- Easy pull-out of fibres → enhanced splintering
SANDVIK COROMANT USER’S GUIDE - COMPOSITE SOLUTIONS 28