Analysis of Surface Roughness for High Speed Milling of a Magnesium Alloy Part

Surface roughness represents an important characteristic in the appreciation of a part quality. A good surface quality can enhance corrosion resistance and fatigue behavior throughout product life cycle. Magnesium alloys have gained in the recent years a larger use due to an excellent ratio between mechanical strength and weight. Cooling conditions are particularly important when machining magnesium. The chips are flammable and highly reactive with water based fluids. Higher temperature favors also the formation of built-up edge and worsens surface quality. The present paper analyses the influence of cooling conditions and cutting parameters on surface roughness of the parts made of magnesium alloy. Using design of experiments technique, a series of experiments were organized and based on that a connection between surface quality and cutting conditions was established.