Cutting temperature of magnesium alloys at extremely high maching speeds

Abstract

The tool-workpiece thermocouple method (Gottwein's method) was applied for measuring the cutting temperature of Mg and AZ31 and AZ80 alloys. The cutting conditions were; cutting speed 400 to 2200m/min, feed 0.06 to 0.65mm/rev and cutting depth 3 and 5mm. The highest cutting temperatures of 480°, 520° and 530°C are attained at the cutting speed 2000m/min for Mg, AZ31 and AZ80 respectively. The practical cutting condition is discussed on the basis of the isothermal curves on the cutting speed-feed diagram with respect to the present extremely high turning speed for Mg. The cutting temperature is below about 400°C.