scholarly journals Model System Studies of Wear Mechanisms of Hard Metal Tools when Cutting CFRP

2016 ◽  
Vol 149 ◽  
pp. 24-32 ◽  
Author(s):  
Henrik Buse ◽  
Paul Feinle
Keyword(s):  
Wear Mechanisms ◽  
Hard Metal ◽  
Model System ◽  
Metal Tools

scholarly journals Anti-Friction and Anti-Wear Mechanisms of Micro Textures and Optimal Area Proportion in the End Milling of Ti6Al4V Alloy

2019 ◽  
Vol 3 (4) ◽  
pp. 91 ◽  
Author(s):  
Tong ◽  
Liu ◽  
Yu
Keyword(s):  
Wear Mechanisms ◽  
End Milling ◽  
Hard Metal ◽  
Starting Point ◽  
Milling Tool ◽  
Low Efficiency ◽  
Optimal Area ◽  
Metal Tools ◽  
Wear Tests ◽  
Friction And Wear Tests

To solve the problems of low efficiency, poor surface quality, and short tool life in the milling of titanium alloys, this study took the micro-textured ball-end milling tool as a starting point and established a platform for friction and wear tests. Based on a new method of external friction theory, the anti-friction and anti-wear mechanisms of the micro-textured tool were analyzed. According to these mechanisms, the optimal area proportion of the micro textures in the contact area between the chip and tool was theoretically investigated considering the milling force, and the proportion was verified experimentally. This work provides a reference for improving the cutting performance of hard metal tools.

Cobalt exposure in wet grinding of hard metal tools for wood manufacture

1994 ◽  
Vol 150 (1-3) ◽  
pp. 117-119 ◽  
Author(s):  
G. Sesana ◽  
G. Cortona ◽  
A. Baj ◽  
T. Quaianni ◽  
E. Colombo
Keyword(s):  
Hard Metal ◽  
Wet Grinding ◽  
Cobalt Exposure ◽  
Metal Tools

scholarly journals PCBN Performance in High Speed Finishing Turning of Inconel 718

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 582 ◽  
Author(s):  
José Díaz-Álvarez ◽  
Víctor Criado ◽  
Henar Miguélez ◽  
José Cantero
Keyword(s):  
Tool Wear ◽  
Inconel 718 ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Hard Metal ◽  
Abrasive Tool ◽  
Polycrystalline Cubic Boron Nitride ◽  
Metal Tools ◽  
Pcbn Tools ◽  
Cutting Speeds

Inconel 718 is a Ni superalloy widely used in high responsibility components requiring excellent mechanical properties at high temperature and elevated corrosion resistance. Inconel 718 is a difficult to cut material due to the elevated temperature generated during cutting, its low thermal conductivity, and the strong abrasive tool wear during cutting process. Finishing operations should ensure surface integrity of the component commonly requiring the use of hard metal tools with sharp tool edges and moderate cutting speeds. Polycrystalline cubic boron nitride (PCBN) tools recently developed an enhanced toughness suitable for these final operations. This paper focuses on the study of PCBN tools performance in finishing turning of Inconel 718. Several inserts representative of different manufacturers were tested and compared to a reference carbide tool. The evolution of tool wear, surface roughness, and cutting forces was analyzed and discussed. PCBN tools demonstrated their suitability for finishing operations, presenting reasonable removal rates and surface quality.

An Analytical Model of Mechanistic Wear of Polymers

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Sandip Panda ◽  
Mihir Sarangi ◽  
S. K. Roy Chowdhury
Keyword(s):  
Abrasive Wear ◽  
Wear Mechanisms ◽  
Low Cycle Fatigue ◽  
Polymer Surface ◽  
Hard Metal ◽  
Polished Surface ◽  
Asperity Contact ◽  
Sliding Interfaces ◽  
Polymer Metal ◽  
Adhesive Interactions

This paper proposes a wear model for polymers based on so-called mechanistic processes comprising both low cycle fatigue and abrasive wear mechanisms, which are prominent in polymer–metal sliding interfaces. Repeated elastic contact causes localized fatigue, whereas abrasive part is an anticipatory outcome of plastic contacts by hard metal asperities on to soft polymer surface. Further, presuming adhesive interactions in elastic–plastic contacts, asperity contact theories with necessary modifications were analyzed to assess load and separation for their subsequent use in elementary wear correlations. Both Gaussian and Weibull distributions of asperity heights were considered to include statistics of surface microgeometry. Finally, volumetric wear was written in terms of roughness parameters, material properties, and sliding distance. Validation was conducted extensively, and reliability of the formulation was achieved to a large extent. Experimental part of this work included several pin-on-disk tests using polyether ether ketone (PEEK) pins and 316L stainless steel disks. Disks with different roughness characteristics generated by polishing, turning, and milling were tested. Experimental results agreed well with predictions for the polished surface and with some deviations for other two surfaces. Further, fatigue to abrasive wear ratio was identified as an analytical tool to predict prevailing wear mechanism for polymer-metal tribo-systems. After examining the considered cases, it was both interesting and physically intuitive to observe a complete changeover in wear mechanisms following simply an alteration of roughness characteristics.

Diamond Like Structure Nano Carbonitrides Hardening of Hard Alloys Cutting Tools

2012 ◽  
Vol 428 ◽  
pp. 65-68 ◽  
Author(s):  
Y.A. Minaev
Keyword(s):  
New Technology ◽  
Cutting Tools ◽  
Fundamental Property ◽  
Hard Metal ◽  
Hard Alloys ◽  
Crystalline Materials ◽  
First Order Phase Transition ◽  
Hard Metals ◽  
First Order Phase ◽  
Metal Tools

The fundamental property of solid crystalline materialsi.e.phenomena of first-order phase transition of grain boundaries with formation of two-dimensional liquid have been used for elaboration of the new technology. Nitriding type methods have been used to develop strategies for effective forming of coatings by synthesis of nitrides and carbonitrides on surface layers of hard metals. WC-Co and WC-TiC-Co hard metal tools have been used for experiments. Industrial tests indicated that the tools functional properties improved 2-9 times. The new tools demonstrated a high resistance to surface wear and to fragile break–down. The formed layers, interface and binder behaviour have been investigated through the experiments with use of optic and electron microscope, X-ray phase analysis and micro-hardness device measures. The layer microstructure investigation demonstrates: the hardening of thin surface layer (0.1-0.3 mm) by nanosize carbonitrides with diamond like structure and strengthening of the following layer by recristallization of W carbides grains and by formation of coherent structure in Co-binder.

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