Establishment of tool wear suppressing method for ceramic tool in cutting of free-machining steel for high speed machining

BN易切削钢车削时的刀具寿命明显高于标准钢。特别是在VB=0.3mm的刀具寿命标准下，添加TiC的氧化铝陶瓷刀具的刀具寿命达到10小时左右。这种刀具寿命是涂层硬质合金刀具的两倍。在断续切削中，当切削深度设定在相对较小时，可以使用添加TiC的氧化铝陶瓷刀具。

The tool lives in turning of BN free-machining steel were obvious longer than those of standard steel. In particular, the tool life of TiC added alumina ceramic tool reached about 10 hours in the case that the tool life criteria was set at VB=0.3mm. This tool life was twice as long as that of coated carbide tool. In intermittent cutting, when depth of cut was set at relatively small, TiC added alumina ceramic tool was able to be used.