Abstract: The wear of the tools during the machining of a solid nickel-titanium wire was investigated. A novel tool design was developed to facilitate debris evacuation, and the effect of the tool design on tool performance was studied. The results indicated that the tool geometry and the material selection had a significant effect on the tool performance. Keywords: continuous wire-sawing; solid wire-sawing; deformation and wear of the tools; solid wire-sawing; tool design; wire-sawing, material test
Abstract: The main goal of this study is to establish a maximum intensity criterion for the application of binary phase materials in the fabrication of tools, especially dry cutters. In this study, two superhard materials, namely cubic boron nitride (c-BN) and wurtzite boron carbide (B4C), were considered to be applied as the main components of a tool body made of a binary phase material. A parametric study was performed to determine the effect of the interaction between superhard and the matrix, as well as various optimal conditions, on the mechanical and physical properties of the component. The effects of the interaction between the superhard and the matrix, and the machining conditions (cutting speed and feed rate), on the physical properties of the binary phase tool, including strength, hardness, and fracture toughness, were evaluated. The results indicated that the B4C-matrix composite exhibited better strength and fracture toughness values than the c-BN-matrix composite. Experimental and analytical methods were used in conjunction to identify the optimum design.Keywords: c-BN, wurtzite boron carbide, strength, hardness, fracture toughness, binary phase materials; tools
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Abstract:The article presents research results that demonstrate the impacts of mechanical and tribological characteristics on the efficiency of cutting tools made from hard metal WC-Co. Uncoated tools and tools coated with physical vapor deposition (PVD) coatings (CrN and TiAlN) were tested. The thickness of coatings was determined, and tests of roughness, microhardness, and adhesion were performed.
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