Austempering Ductile Iron is a new wearable and hard-machining bulb steel material. According to the manufacture situation of ADI presently, a proper range of the austempering temperature and time is selected to prepare for a series of samples, then the mechanical performance is tested to analyze and compare the metal organization in this paper. The wear and failure mechanism of the PCBN and Ceramic cutter is researched when cutting ADI materials with different performance by high-speed dry cutti...