Tool material is to determine the cutting tool performance of the fundamental factors for processing efficiency, processing quality, processing costs and tool life greatly affected. The harder the tool material, the better its wear resistance, the higher the hardness, the lower the impact toughness, the more brittle materials. Hardness and toughness is a contradiction, but also tool materials should be overcome by a key.

For graphite cutting tools, ordinary TiAlN coating can be selected in the appropriate choice of a relatively good toughness, that is slightly higher cobalt content; for diamond-coated graphite tool, the choice of the appropriate material on the hardness of relatively good point , Which is a little lower cobalt content.

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