Abstract
The dry cutting of Al-Si chill cast alloys (F and T6-materials of AC2B, AC4A, AC4B, and AC8A) were performed by using the CBN and diamond sintered tools, and semi continuous cast alloy of AC4B which had fine structure were cut in dry with the SKH4, K10, CBN and diamond sintered tool. And so, aspects of cut surface with these tools were examined with EPMA and profilometer.
In cutting with diamond sintered tool, cut surface roughness of the chill cast alloys containing large hard particles were better than CBN sintered tool in any cutting speed. But there was of no advantage to diamond sintered tool in cutting semi continuous cast alloy (AC4B) containing small hard particles.
In cutting 7075-T6 alloy which was used to compare with Al-Si cast alloys, cut surface roughness with diamond sintered tool was the best of all used tools, because front cutting edge geometry of this tool was transfer on cut surface.
