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This article deals with the machining of Inconel 718 alloy. In the research, several carbide milling tools with different carbide grades and coatings were used. The main aim is compare all cutting tools in terms of their cutting tool life during machining super alloy Inconel 718. This material is used for highly stressed components in the nuclear industry, such as combustion turbine. Due to its rapid hardening and high heat generation, it is very problematic to machining. The right choice of appropriate carbide grade is necessary to achieve high-quality cutting wedge, which is important for good adhesion of the coating. The results of this work will be used for further research and development of cutting tools for machining Inconel 718.

Inconel 718 alloy exhibits high strength and creep-rupture strength at high temperatures. These properties are heavily influenced by heat treatment. Machining, especially milling of this alloy is very difficult because of the high strength and hardness at high temperature. Self-hardening is one of the problems, which leads to enormous tool wear. Productivity of machining is relatively low. This paper is focused on the factors which have the greatest effect on the cutting tool wear and the machined surface quality when the Inconel 718 is machined. There is a description of these factors and their explanations. The experiment for comparing three different cutting tool materials is described. The experiment is also focused on the confirmation of the theoretical information.

This article deals with the experimental grinding of Inconel 718. This material is used for highly stressed components in the nuclear industry, such as combustion turbines. The material is very problematic for machining due to its rapid hardening and high heat generation. Two types of Inconel 718 in the form of testing bars were finished by cylindrical grinding using different cutting conditions and strategies. The main aim is to determine the impact of grinding conditions on the surface quality in terms of surface roughness after grinding. The resulting surface was scanned using an opticalscanning device to observe the topography of the ground surface. The grinding wheel was measured after grinding each bar to observe the wheel wear and the changes of the grinding wheel shape. The spindle load was monitored during grinding to see the effect of different strategies on the grinding process. The results from this work will be used in further studies and contribute to a better understanding of grinding Inconel 718.