Effect of Cutting Parameters on Ignition of AM50A Mg Alloy during Face Milling

The ignition of magnesium alloy chips is an important problem during dry machining. In this paper, the influence of cutting speed, feed rate, and depth of cut on ignition of AM50A magnesium alloy during high-speed face milling was investigated. It was found that ignition could easily be caused under some cutting speed and feed rate when the depth of cut was fixed and ignition was rarely observed when the depth of cut was 80 µm. Moreover, the relationship between morphology of chip and frequency of ignition was explored. We found that intertwined chips easily produced ring of fire.