Due to the low dimensional accuracy and poor surface roughness of laser additively manufactured products, the cutting processing is needed in the subsequent treatment. In this study, compared with the wrought Inconel 718 superalloys, the laser additively manufactured Inconel 718 superalloys were used as the research objects and were machined by the cemented carbide, coated cemented carbide and CBN tools. By analyzing the workpiece characteristics, cutting force, cutting temperature and cutting vibration, the wear morphologies and wear mechanisms of different tools were studied. The results revealed that the density and microhardness of additively manufactured superalloys were smaller than those of wrought superalloys, while the thermal conductivity was higher. In addition, the chips of additively manufactured superalloys were irregular and continuous, while the chips of wrought superalloys were helical. The cutting force, cutting temperature and cutting vibration of additively manufactured superalloys were smaller than those of wrought superalloys. Moreover, in the turning of additively manufactured superalloys, the cemented carbide tool and CBN tool presented short lives and fast wear, while the coated cemented carbide tool had a long life. The wear morphologies of cemented carbide tools were mainly crater wear and flank wear, the wear morphologies of coated cemented carbide tools were mainly crater wear and flank wear with coating spalling and nose breakage, and the wear morphologies of CBN tool were mainly edge breakage and groove wear. The main tool wear mechanisms were abrasive wear, adhesive wear, oxidation wear, coating spalling and fatigue crack. Although the obtained surface roughness of machined alloys by each tool met the requirements of finish machining, from the perspective of tool life, the coated carbide tools were suitable for the turning of laser additively manufactured nickel-based superalloys.
