Advantages of Tungsten Carbide Indexable Insert for Turning

Tungsten carbide indexable insert for turning mainly adopts CVD coating technology to improve the bonding strength and reliability of coating. Its abrasion resistance and tipping resistance have been greatly improved compared with previous ones. The advantages of tungsten carbide indexable insert for turning mainly lie in the following aspects:

I.    Improved abrasion resistance
In a practical application, the adhesive strength of tungsten carbide base body and its coating can be improved through thicker layer of close-grained Al2O3 even coating and the abrasion resistance can also be improved. Except that, the resistance property can be strengthened by increasing the proportion of AL in TiAlN coating.

II.    Improved tipping resistance
To do strengthening and toughening towards the tungsten carbide base body surface can prevent tipping and damage of cutting edge.

III.    Reduced bonding phenomenon
During the turning of SCM steel with soft quality and high toughness, the material bonding in cutting edge easily happens, which may cause the stripping of coating and the blade tipping. However, it can be prevented by adopting Ti compound.

IV.   More sharped cutting edge
To prevent coating stripping in the cutting edge of tungsten carbide indexable insert, the cutting edge is generally made into R shape. The blade using in cutting small workpiece and grooves normally has a sharp cutting edge. Therefore, it would be better to keep the PVD coating thickness within 3μm.

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