Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 06, 2021
Inconel 625 is an alloy consisting of Ni with Cr and other elements. Inconel 625 has the advantages of high-temperature strength, oxidation resistance, and corrosion resistance, and therefore is used in the places exposed to harsh environments such as aircraft jet engines and chemical plants. However, due to its low thermal conductivity, high tool affinity, and susceptibility to work hardening, it is difficult to machine and is considered as a difficult material to cut. While the research on turning Inconel 625 has been conducted, there are fewer examples of the research on cutting compared to turning. Therefore, in this study, in order to improve the efficiency of the cutting of Inconel 625, the cutting process was carried out under two kinds of rotation speeds and four kinds of feeds per flute for high feed machining using a coated carbide end mill. The tool life was compared from the tool wear and the surface roughness of the machined surface, and the effect of feed rate on the tool life and surface roughness was clarified. In addition, the state of tool welding and coating peeling were observed, and the occurrences in welding due to differences in feed rate on tool life were clarified.
