Evaluation of Machining and Milling Performance of the FCD 600 Spheroidal Graphite Cast Iron after Austempering Heat Treatment

摘要

This study explores the results of machining and milling tests carried out to determine the effect of cutting tool types, machining and milling parameters of FCD 600 spheroidal graphite cast iron after austempering heat treatment on tool life and workpiece surface roughness. The cutting tools used in the machining and milling tests were PCBN coated tungsten carbide inserts, and TiAlN and TiSiN coating milling tools. The experiment results shows that the tools flank wear increases with the cutting time and machining speed increasing during the machining and milling tests. In addition, decreasing the cutting speed as one of the important operation factors in machining of ADI, does improve the tools life and workpiece surface roughness. In the milling test, results revel the tools flank wear and workpiece surface roughness of TiSiN coating milling tools were better than TiAlN coating milling tools. The best surface roughness Ra=0.75 μm was shown in the milling conditions of TiSiN coating milling tools and cutting speed =50 m/min.