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The article deals with machining and development of the wear of cutting tools for turning of nickel alloy Inconel 718 - 2.4648. This alloy is characterized by high strength and toughness, low thermal conductivity and high abrasion. As a result of these properties, the alloy has worsened machinability and it is necessary to put emphasis on technology, a choice of cutting tools, their geometry and cutting conditions. The exchangeable cutting inserts marked VBMT 160402F-1, made from sintered carbide and pre-verified cutting conditions were used for machining of the alloy. The microgeometry of cutting tools was defined with brushing technology and abrasive jet machining technology. The edge radius rn = 20±5 μm on cutting inserts was created by the brusher with abrasive corundum particles and the edge radius rn = 20±5 and 35±5 μm was created by abrasive jet machining technology. A gradual wear development and its intensity was checked during turning process of Inconel 718 with the use cutting tools with rectified cutting edge. Depending on intensity of a wear on major flank was determined a tool-life of cutting inserts and an influence of the microgeometry on machining process of alloy was considered.
Keywords: wear, nickel alloy, Inconel, cutting tools, microgeometry© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.