Comparative Investigation on Machinability of GH4169 and K4169 Nickel-Based Superalloys
GH4169 and K4169 belong to deformed nickel-based superalloy and cast nickel-based superalloy respectively,with different forming process and heat treatment state.Comparative experiments on machinability of GH4169 and K4169 are carried out with uncoated carbide tools under dry cutting condition.The differences in machinability of two materials are revealed in the aspects of cutting force and tool wear.Possible explanation of the differences are made out according to mechanical properties and microstructure of two kinds of materials.The results reveal that there is no significant difference in cutting force during the cutting process of the two materials.With the increase of cutting speed and feed rate,the wear pattern of GH4169 changes from tip wear to uniform wear and finally to groove wear on flank face of the tool,while the wear forms of K4169 are uniform wear and groove wear with no tip wear observed.Hard points such as C compounds in K4169 microconstituent are the main cause of large fluctua-tion of cutting force and groove wear on flank surface of the tool.
NETL
NSTL
万方数据
维普
