Micromechanisms of Tungsten Carbide Inserts’ Tool Wear (1)

Under a certain cutting condition, it could be examined that the tungsten carbide inserts’ tool wear is result of variety of mechanisms, and each one of which owns ability to dominant wear mechanism. In general, for the tungsten carbide inserts, the main micromechanisms of tool wear include, adhesive wear, abrasive wear, dissolution wear and oxidation wear, corrosive wear, plastic dominated wear,chipping.

Adhesive Wear

During the chip formation process, it has been pointed out that the chips would slide over the rack face of cutting tool, and it cleans the surface to form an oxides and contaminants free area. But it should be noticed that, for these surface, there is a potential to become one continuous adhesive junction, and when this junction is broken due to the flow of chips, some part of the tool material is removed. It has been found that, especially during steel machining, with more brittle tungsten carbide cutting tools, the adhesive junction is able to result in the whole tungsten carbide particle being plucked from the tool.


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