Ceratizit - полный каталог инструмента 2016 EN
Causes of wear
A273
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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
a
b
dc
Cutting temperature
With increasing cutting temperature the thermally caused
wear types of oxidation and diffusion prevail.
Increase of ap; f; vc
Cutting temperature and wear depend decisively upon
the machining conditions.
a = diffusion
b = mechanical abrasion
c = oxidation
d = damage due to built-up edge (BUE)
Cutting speed
Feed rate
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
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