Correlação entre as características de insertos de metal duro utilizados no fresamento de faceamento do aço ABNT 1045 e sua vida útil

Abstract

The metalworking industry demands more and more the development of the manufacturing processes, mainly the modernization of the machine tools and the constant evolution of the cutting tools. The correct choice of cutting and machining parameters not only becomes a matter of monitoring the technology, but a necessity, due to the increased demand and cost reduction of the process with product quality assurance. The carbide tools, from different manufacturers present microstructural differences due to the characteristics intrinsic to the manufacturing process to which they are subjected (powder metallurgy). The present research was developed with the purpose of verifying the relevance of these microstructural differences and the properties of the tools. The characterization was based on the identification of the elements and components present in the microstructure, thickness of the coating, average size of the carbide grains, concentration of binder. It was found that carbide tools from different manufacturers, applied in the same machining process and the same ISO classes, have variation in the tungsten carbide granulometry and differences in hardness, elastic modulus and in the toughness of the substrate and coating. It was also possible to understand some reasons that point to the useful life gain of one of the tools studies in relation to the other.