scholarly journals Investigation of Cutting Temperature during Turning Inconel 718 with (Ti,Al)N PVD Coated Cemented Carbide Tools

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1281 ◽  
Author(s):  
Jinfu Zhao ◽  
Zhanqiang Liu ◽  
Qi Shen ◽  
Bing Wang ◽  
Qingqing Wang
Keyword(s):  
Physical Properties ◽  
Inconel 718 ◽  
Great Influence ◽  
Cutting Temperature ◽  
Cemented Carbide ◽  
Machining Process ◽  
Coated Tools ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide ◽  
Thermo Physical Properties

Physical Vapor Deposition (PVD) Ti1−xAlxN coated cemented carbide tools are commonly used to cut difficult-to-machine super alloy of Inconel 718. The Al concentration x of Ti1−xAlxN coating can affect the coating microstructure, mechanical and thermo-physical properties of Ti1−xAlxN coating, which affects the cutting temperature in the machining process. Cutting temperature has great influence on the tool life and the machined surface quality. In this study, the influences of PVD (Ti,Al)N coated cemented carbide tools on the cutting temperature were analyzed. Firstly, the microstructures of PVD Ti0.41Al0.59N and Ti0.55Al0.45N coatings were inspected. The increase of Al concentration x enhanced the crystallinity of PVD Ti1−xAlxN coatings without epitaxy growth of TiAlN crystals. Secondly, the mechanical and thermo-physical properties of PVD Ti0.41Al0.59N and Ti0.55Al0.45N coated tools were analyzed. The pinning effects of coating increased with the increasing of Al concentration x, which can decrease the friction coefficient between the PVD Ti1−xAlxN coated cemented carbide tools and the Inconel 718 material. The coating hardness and thermal conductivity of Ti1−xAlxN coatings increased with the increase of Al concentration x. Thirdly, the influences of PVD Ti1−xAlxN coated tools on the cutting temperature in turning Inconel 718 were analyzed by mathematical analysis modelling and Lagrange simulation methods. Compared with the uncoated tools, PVD Ti0.41Al0.59N coated tools decreased the heat generation as well as the tool temperature to reduce the thermal stress generated within the tools. Lastly, the influences of Ti1−xAlxN coatings on surface morphologies of the tool rake faces were analyzed. The conclusions can reveal the influences of PVD Ti1−xAlxN coatings on cutting temperature, which can provide guidance in the proper choice of Al concentration x for PVD Ti1−xAlxN coated tools in turning Inconel 718.

scholarly journals The Performance of TiAlSiN Coated Cemented Carbide Tools Enhanced by Inserting Ti Interlayers

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 918 ◽  
Author(s):  
Guodong Li ◽  
Liuhe Li ◽  
Mingyue Han ◽  
Sida Luo ◽  
Jie Jin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Inconel 718 ◽  
Cutting Performance ◽  
Cemented Carbide ◽  
Multilayer Coatings ◽  
Interlayer Thickness ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

To enhance the cutting performance of TiAlSiN coated cemented carbide tools by inserting Ti interlayers and to explore their mechanism, TiAlSiN/Ti multilayer coatings with different Ti thicknesses, including 0 nm, 25 nm, 50 nm, 100 nm, and 150 nm, were deposited onto cemented carbide (WC-10 wt%, Co) substrates by high power impulse magnetron sputtering (HiPIMS). The microstructure, hardness, grain orientation, residual stress, adhesion, and toughness of those coatings were measured, and the cutting performance against Inconel 718 was analyzed. Meanwhile, finite element method (FEM) indentation simulations were performed to gain detailed insight into the effects of Ti interlayer thickness on mechanical properties of TiAlSiN/Ti multilayer coatings. Results demonstrated that mechanical properties of TiAlSiN multilayer coatings were significantly changed after the Ti interlayer was introduced, and the multilayer coating #M2 with 25 nm Ti layer showed the excellent toughness and adhesion without sacrificing hardness too much. As Ti interlayer thickness increased, both toughness and adhesion decrease owing to the plastic mismatch between individual layers, and these changes were discussed detailedly with finite element method. Moreover, the result of the cutting experiment also revealed that the tool flank wear Vb can be reduced by the multilayer structure. This improvement is believed to be due to the increasing toughness, which alleviated the damage caused by the continuous impact load of hard phases generated by Inconel 718 during cutting.

Study on the Machinability Characteristics of Ti2AlNb Based Alloy in Turning with Coated Cemented Carbide Tools

2016 ◽  
Vol 836-837 ◽  
pp. 106-111 ◽  
Author(s):  
Bing Bai ◽  
Hong Hua Su ◽  
Lin Jiang He ◽  
Ling Ji Liao ◽  
Jing Gang Ren
Keyword(s):  
Cutting Force ◽  
Feed Rate ◽  
Cutting Temperature ◽  
Parameters Optimization ◽  
Cemented Carbide ◽  
Depth Of Cut ◽  
Small Depth ◽  
Cutting Velocity ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

As a new type of material, Ti2AlNb based alloy has a broad application prospects in aerospace field due to its excellent properties such as low density, high specific strength at elevated temperature, excellent oxide and creep resistance. Many studies involving its material composition and structural properties have been published. However, there are relatively few literatures available on the machinability of Ti2AlNb based alloy. In this work, the turning experiment of Ti2AlNb based alloy was carried out with coated cemented carbide tools. The machinability of Ti2AlNb based alloy was investigated through the cutting force, cutting temperature, tool wear and surface roughness. The result shows that the cutting force is lower and surface quality is better under condition of higher cutting velocity, lower feed rate and smaller depth of cut. The life of tool is longer when they were cutting under the high cutting velocity, low feed rate and small depth of cut. The research could provide some instructive information and basic data for the turning process parameters optimization of Ti2AlNb based alloy.

Effect of tool wear on the surface integrity of Inconel 718 in face milling with cemented carbide tools

Wear ◽  
2021 ◽  
pp. 203752
Author(s):  
A.R.F. Oliveira ◽  
L.R.R. da Silva ◽  
V. Baldin ◽  
M.P.C. Fonseca ◽  
R.B. Silva ◽  
...  
Keyword(s):  
Tool Wear ◽  
Surface Integrity ◽  
Inconel 718 ◽  
Face Milling ◽  
Cemented Carbide ◽  
Cemented Carbide Tools

scholarly journals Wear mechanisms of uncoated and coated cemented carbide tools in machining lead-free silicon brass

Wear ◽  
2017 ◽  
Vol 376-377 ◽  
pp. 143-151 ◽  
Author(s):  
Volodymyr Bushlya ◽  
Daniel Johansson ◽  
Filip Lenrick ◽  
Jan-Eric Ståhl ◽  
Fredrik Schultheiss
Keyword(s):  
Wear Mechanisms ◽  
Cemented Carbide ◽  
Lead Free ◽  
Free Silicon ◽  
Cemented Carbide Tools ◽  
Coated Cemented Carbide

CVD-Diamantwerkzeuge mit SiC-Zwischenschicht/CVD-Diamond coated tools with SiC-interlayer

2019 ◽  
Vol 109 (11-12) ◽  
pp. 857-861
Author(s):  
E. Uhlmann ◽  
E. Bath ◽  
J. Gäbler ◽  
M. Höfer
Keyword(s):  
Adhesive Strength ◽  
Diffusion Barrier ◽  
Cvd Diamond ◽  
Cemented Carbide ◽  
Coating Process ◽  
Research Project ◽  
Coated Tools ◽  
Pre Treatment ◽  
Cemented Carbide Tools ◽  
Cutting Experiments

Der Cobalt-(Co)-Anteil in Hartmetallen diffundiert während des Diamantbeschichtungsprozesses in die Diamantschicht und mindert deren Haftfähigkeit. Siliciumcarbid-(SiC)-Zwischenschichten können als Diffusionsbarriere für Cobalt dienen und die konventionelle Ätzvorbehandlung der Substrate ersetzen. Im Rahmen einer Forschungsarbeit werden Beschichtungsprozesse mit SiC-Zwischenschicht entwickelt, diese Schichtsysteme auf verschiedene Substrate aufgebracht und durch Zerspanungsuntersuchungen bewertet.   The cobalt (Co) content in cemented carbide tools diffuses into the diamond layer during the coating process and reduces its adhesive strength. Siliciumcarbid-(SiC)-interlayers can serve as a diffusion barrier for cobalt and replace the conventional etching pre-treatment of blanks. In a research project different coating processes with SiC-interlayer are developed, the coating systems are applied to different substrates and evaluated in cutting experiments.

Influence of Cup Wheel Grinding and Etching Pretreatment on Residual Stress and Surface Topography for Coated Cemented Carbide Tools

2012 ◽  
Vol 497 ◽  
pp. 10-14
Author(s):  
Tie Jun Song ◽  
Zhi Xiong Zhou ◽  
Wei Li ◽  
Ai Min Tang
Keyword(s):  
Residual Stress ◽  
Surface Topography ◽  
Cutting Tools ◽  
Wheel Speed ◽  
Cemented Carbide ◽  
Machining Process ◽  
Grinding Wheel ◽  
Near Surface ◽  
Cup Wheel ◽  
Coated Cemented Carbide

Cup wheel grinding and etching pretreatment are widely used in complex coated cemented carbide cutting tools machining process. The two processes determine different surface properties due to various mechanical and thermal loads in grinding and complex chemical reaction in etching pretreatment. In this paper, the effect of the grinding wheel speed, the grinding feed rate and the etching time with the Murakami and acid solution on the residual stress and surface topography of coated cemented carbide cutting tools are investigated. After each process, the samples are characterized by scanning electron microscopy and X-ray diffraction. It is found that the grinding wheel speed has a significant influence on residual stress measured in the WC phase. Etching by Murakami generated smooth surface, which partly removed the near-surface residual stress quickly but cannot eliminate.

Influence of milling direction in the machinability of Inconel 718 with submicron grain cemented carbide tools

2019 ◽  
Vol 105 (1-4) ◽  
pp. 1343-1355 ◽  
Author(s):  
Antonio Favero Filho ◽  
Leonardo Rosa Ribeiro da Silva ◽  
Rodrigo de Souza Ruzzi ◽  
Eder Silva Costa ◽  
Wisley Falco Sales ◽  
...  
Keyword(s):  
Inconel 718 ◽  
Cemented Carbide ◽  
Cemented Carbide Tools
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