Because of PCBN has high hardness and wear resistance, do not react with iron group metals at high temperature of chemical inertness, so it is mainly used for high hardness material and machining of difficult-to-machine materials, such as hardened steel, high alloy wear resistant cast iron, high temperature alloy, high speed steel, surface spray welding materials, sintered metal materials machining difficult-to-machine materials.
How to select PCD tool? Generally speaking, the larger the PCD size, the stronger the tool wear resistance. Usually finishing or super finishing, the selection of fine particle PCD, and coarse particle PCD tool selection. Tool manufacturers often recommend the use of fine particle PCD grades for silicon-free and low-silicon aluminum alloys and the use of coarse-particle PCD grades for high-silicon aluminum alloys for the same reason. PCD tool processing surface quality in addition to see the granularity of the tool, also mainly depends on the quality of the cutting edge of the tool, so the quality of PCD tool must be better. PCD cutting edge common processing methods generally have two kinds, one is through the way of slow-feeding wire cutting processing, this way of processing cost is low, but the quality of the edge is general. And the other is through laser to rough machining, the cost is slightly higher, but the quality of the edge is much better than slow-feeding wire cutting processing. There is another is to use laser rough machining and then grinding to finish, the edge quality is best.
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