摘要
Using LBR-370 numerical control lathe,high speed cutting was applied to AZ31 magnesium alloy.The influence of cutting parameters on microstructure,surface roughness and machining hardening were investigated by using the methods of single factor and orthogonal experiment.The results show that the cutting parameters have an important effect on microstructure,surface roughness and machine hardening.The depth of stress layer,roughness and hardening present a declining tendency with the increase of the cutting speed and also increase with the augment of the cutting depth and feed rate.Moreover,we established a prediction model of the roughness,which has an important guidance on actual machining process of magnesium alloy.
基金
National Natural Science Foundation of China(Grant No.51505143)
Hunan Provincial Natural Science Foundation of China(Grant nos.14JJ3111)
L.L.appreciates the financial supports from the China Postdoctoral Science Foundation(Grant No.2014M562128)
Scientific Research Fund of Hunan Provincial Education Department(Grant no.14C0455).
