抄録
For improving the machinability of Al alloys, especially the chip breaking, low melting metals such as Pb and Bi have been added. Recently,. however, from the viewpoint of the environmental protection, the use of the low melting metals is restricted, and as the alternative method, dispersion of Si particles as the nucleus of chip braking is pointed out. Investigated the effect of Si dispersion on machinability of Al-Cu alloys, there was little influence of Si dispersion to machinability at dry cutting. However it was clarified that the chip breaking of Al-Cu alloys dispersed Si particles was improved remarkably by using cutting fluids.
