Abstract
In this study, the machinability of fire-resistant magnesium alloy was investigated in orthogonal cutting and turning. The main results obtained are as follows: (1) Saw tooth chip and crack type chip were generated in orthogonal cutting. And the surface roughness became worse when the crack type chip was generated. (2) In turning, both principal force and feed force didn't decrease and kept almost steady value even if the cutting speed increased.(3) Under this experimental condition, the surface roughness didn't become worse in turning with PCD tool and cemented carbide tool even if depth of cut increased.
