The Cutting Process Of Nickel-base Superalloy GH4169 And The Optimization Of Insert Groove

Nickel based superalloy GH4169 is one of main components of the aircraft engine parts. The machining of aviation engine parts mostly rely on imported tools. It is not conducive to reducing the production costs of aviation enterprises but also restricts the strategic safety of our country. The main researches on the cutting performance of GH4169 are focused on chip breaking performance, coating technology, carbide materials and advanced processing. In fact, cutting force and wear are also greatly affected by the groove profile of inserts. Especially, it is obvious in the process of turning GH4169. Therefore, it is significantly to study cutting process of GH4169 and groove structure optimization.In this paper, turning experiments of GH4169 were carried out by using different groove profile carbide inserts with PVD coated YBG105. The cutting force, cutting mechanism and tool life were obtained by using dynamometer K istler and super depth of field microscope Easson equipments. The influence of wear on groove structure was analyzed. New groove profile insert SNR5 was manufactured after optimization by FES. The cutting temperature of all groove type inserts were simulated by Advant Edge. In order to contrast the turning pe rformance, wear experiments were carried out under the same cutting parameters.Experimental results show that cutting force is decreased with the increase of cutting speed, and increased with the increase of cutting depth and feed. Under the same cutting parameters, the larger the rake angle is, the structure coefficient and cutting force are smaller, and cutting temperature is decreased as the rake angle increases. In the same parameters, the cutting force and cutting temperature of SNR5 groove insert are the lowest. Cutting speed changed from 45m/min to 85 m/min, SNR5 groove insert has largest rake angle and reinforced cutting edge structure, so it has best tool life. The cutting data and conclusions obtained from experiments have important influence on establishment of cutting database and the design of the groove structure for turning nickel-based superalloy GH4169.