Page 294 - Ceratizit Catalog

Causes of wear
A273

Wear is caused through simultaneous mechanical and
thermal stress of the cutting edge.
The most common causes are

o Mechanical abrasion
o Damage due to built-up edge (BUE)
o Oxidation processes
o Diffusion

Wear a Wear

b
d c

Cutting temperature Increase of a ; f; v c
p
With increasing cutting temperature the thermally caused Cutting temperature and wear depend decisively upon
wear types of oxidation and diffusion prevail. the machining conditions.

a = diffusion
b = mechanical abrasion Cutting speed
c = oxidation Feed rate
d = damage due to built-up edge (BUE) Cutting depth

Benefits of hard material coatings

Depositing hard material layers on carbide tools
positively influences wear characteristics.

The advantages of hard material layers consist in the
reduction of
○ Friction
○ Temperature changes
○ Oxidation
○ Diffusion
Turning / Technical information