stories on hard material matters - Ceratizit S.A.
stories on hard material matters - Ceratizit S.A.
stories on hard material matters - Ceratizit S.A.
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Oliver Baum, Product Manager Aerospace.<br />
TITANIUM MACHINING<br />
This is where CERATIZIT gets things moving. A carbide<br />
grade with substantially increased heat resistance was<br />
developed. The main advantage of the new CERATIZIT<br />
grade is really its heat resistance, which allows cutting<br />
speeds up to 15-20% higher than comparable products<br />
from competitors.<br />
The recently developed grade which is to protect the<br />
carbide substrate against abrasi<strong>on</strong> also serves as a<br />
heat barrier. This means the coating itself must have low<br />
thermal c<strong>on</strong>ducti<strong>on</strong> properties to prevent the heat from<br />
reaching the carbide. In order to minimise the heat<br />
generati<strong>on</strong>, it is essential that the coating has the<br />
smoothest possible surface and the swarf can glide<br />
over the rake face without substantial resistance. The<br />
recently developed TiB2 coating by CVD from CERATIZIT<br />
totally fulfils these specificati<strong>on</strong>s.<br />
The inserts for titanium machining are customarily<br />
provided with protective chamfers in order to stabilise<br />
them at high temperatures, but this results in the<br />
disadvantage of increased cutting pressure. Now<br />
CERATIZIT offers the decisive competitive edge. Only<br />
the extremely heat resistant substrate of the new<br />
CERATIZIT grade CTC5240 enables the applicati<strong>on</strong> of<br />
inserts with very positive geometries, without protective<br />
chamfer and with a light edge h<strong>on</strong>e to be used for the<br />
machining of titanium. In this way cutting pressure is<br />
reduced which also limits heat generati<strong>on</strong>, and chip<br />
formati<strong>on</strong> is greatly improved through these extremely<br />
positive geometries. Additi<strong>on</strong>ally compressed and<br />
lamellar chips are avoided, i.e. the cutting pressure and<br />
subsequently wear is reduced. All in all these effects<br />
result in a 20% increase in tool life compared to other<br />
suppliers.<br />
Compressed chips due to insufficient chip formati<strong>on</strong><br />
vs. spiral swarf.<br />
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