scholarly journals Adhesion Behavior of PVD-coated Cutting Tools

2020 ◽  
Vol 3 (2) ◽  
pp. 61-64
Author(s):  
Enikő Réka Fábián ◽  
Richard Horváth
Keyword(s):  
Cutting Tool ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Scratch Test ◽  
Adhesion Properties ◽  
Carbide Cutting Tool ◽  
Adhesion Behavior ◽  
Significant Difference ◽  
Dry Conditions ◽  
Coating Layers

AbstractCutting with TiAlN or CrAlN tip PVD-coated tungsten carbide-based inserts manufactured by powder metallurgy, we found no significant difference in the wear behavior of inserts regardless of whether the insert was used in wet or dry conditions. We determined the adhesion properties of the coating layers with a scratch test and by Daimler–Benz test. On the tungsten-based carbide cutting tool, the thinner TiAlN coating showed slightly better adhesion than the thicker CrAlN coating.

Wear Behavior of Multilayer Nanocomposite TiAlSiN/TiSiN/TiAlN Coated Carbide Cutting Tool during Face Milling of Inconel 718 Superalloy

2017 ◽  
Vol 47 ◽  
pp. 11-16 ◽  
Author(s):  
Bilal Kursuncu ◽  
Halil Caliskan ◽  
Sevki Yilmaz Guven ◽  
Peter Panjan
Keyword(s):  
Tool Life ◽  
Inconel 718 ◽  
Cutting Tool ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Face Milling ◽  
Carbide Cutting Tool ◽  
Inconel 718 Superalloy ◽  
Coated Carbide

The Inconel 718 superalloy is one of the most-used nickel based superalloys in the aerospace industry due to its superior mechanical properties, for instance, high thermal and chemical resistance, and high strength at elevated temperatures. However, the work hardening tendency, low thermal conductivity and high hardness of this superalloy cause early tool wear, leading to the material to be called as a hard-to-cut material. Therefore, deposition of a wear resistant hard coating on carbide cutting tools has a critical importance for longer tool life in milling operations of the Inconel 718 superalloy. In this study, carbide cutting tools were coated with multilayer nanocomposite TiAlSiN/TiSiN/TiAlN coating using the magnetron sputtering technique, and wear behavior of the coated tool was investigated during face milling of the Inconel 718 superalloy under dry conditions. Abrasive and adhesive wear mechanisms were founded as main failure mechanisms. The nanocomposite TiAlSiN/TiSiN/TiAlN coated carbide cutting tool gave better wear resistance, and thus it provided 1.7 times longer tool life and a smoother surface (Ra<0.18 μm) on the Inconel 718 material than the uncoated one.

Comparison of CVD and MOCVD-grown Al2O3 coatings in the performance of cemented carbide cutting tool inserts

2011 ◽  
Vol 1298 ◽  
Author(s):  
Piyush Jaiswal ◽  
Abdul Sathar ◽  
Arshiyan Shariff ◽  
Mohammed Saif ◽  
Sukanya Dhar ◽  
...  
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Cemented Carbide ◽  
Superior Performance ◽  
Depth Of Cut ◽  
Carbide Cutting Tool ◽  
Industry Standard ◽  
Low Pressure Mocvd ◽  
Steel Turning

ABSTRACTLow-pressure MOCVD, with tris(2,4-pentanedionato)aluminum(III) as the precursor, was used in the present investigation to coat alumina on to cemented carbide cutting tools. To evaluate the MOCVD process, the efficiency in cutting operations of MOCVD-coated tools was compared with that of tools coated using the industry-standard CVD process.Three multilayer cemented carbide cutting tool inserts, viz., TiN/TiC/WC, CVD-coated Al2O3 on TiN/TiC/WC, and MOCVD-coated Al2O3 on TiN/TiC/WC, were compared in the dry turning of mild steel. Turning tests were conducted for cutting speeds ranging from 14 to 47 m/min, for a depth of cut from 0.25 to 1 mm, at the constant feed rate of 0.2 mm/min. The axial, tangential, and radial forces were measured using a lathe tool dynamometer for different cutting parameters, and the machined work pieces were tested for surface roughness. The results indicate that, in most of the cases examined, the MOCVD-coated inserts produced a smoother surface finish, while requiring lower cutting forces, indicating that MOCVD produces the best-performing insert, followed by the CVD-coated one. The superior performance of MOCVD-alumina is attributed to the co-deposition of carbon with the oxide, due to the very nature of the precursor used, leading to enhanced mechanical properties for cutting applications in harsh environment.

STUDY ON THE TRIBOLOGICAL BEHAVIOR OF CUTTING TOOLS COATED WITH FILMS

2011 ◽  
Vol 25 (31) ◽  
pp. 4261-4264 ◽  
Author(s):  
MANABU YASUOKA
Keyword(s):  
Friction Coefficient ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Frictional Properties ◽  
Coated Tool ◽  
Significant Difference ◽  
The Difference ◽  
Pin On Disk

A hard film coat can improve a tool's performance. In this study, the frictional properties of an uncoated tool and a coated tool with TiN were measured against that of SCM440 (42 CrMo 4) steel. The results showed there was no significant difference between the friction coefficient of the high-speed steel tool and the tool coated with TiN but the friction coefficient of uncoated tool was slightly lower than that of the steel. In the second part of the study, coats of TiN , TiC , CrN , and TiAlN were deposited on high-speed steel and the wear characteristics were determined with a pin-on-disk wear examination. The differences in the friction coefficients were attributed to the difference in the wear of the slipping material. There were large differences in the adhesion characteristics on the surface of the slipping material. The author suggest that these differences influence the characteristics of the cutting tool.

Experimental Tool Wear Observation of Assisted High Pressure Cryogenic Jet in Hard Turning Process

2017 ◽  
Author(s):  
Dong Min Kim ◽  
Do Young Kim ◽  
In Su Jo ◽  
Tae Jin Song ◽  
Kyung Soo Paik ◽  
...  
Keyword(s):  
High Pressure ◽  
Tool Wear ◽  
Tool Life ◽  
Hard Turning ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Alumina Ceramic ◽  
Cryogenic Cooling ◽  
Turning Process ◽  
Dry Conditions

The hard turning process is widely used in automobile and heavy machinery industries. Extreme cutting conditions like high temperature and tool wear rate, are associated with the hard turning process. Cubic boron nitride (CBN) cutting tool is generally preferred for hard machining operations. However, higher tool cost, and tool failure due to thermal shock limits its widespread usage. In machining performance analysis, tool wear is an important parameter which is directly related to the cost of the machining process. Previous studies have reported the improvement in tool life by using cryogenic coolant as a cutting fluid. Objective of this paper is to investigate the effect of cryogenic cooling on the tool wear of CBN and Ti-coated alumina ceramic cutting tools used in the hard turning of AISI 52100 hardened steel. High pressure cryogenic jet (HPCJ) module was optimized and configured to use it for hard turning case. Computational fluid dynamics (CFD) based simulation was used to test and optimize the nozzle design for the flow of cryogenic coolant. It was validated by fundamental heat removal test. Ceramic and CBN cutting tools were then used for hard turning of parts using HPCJ module. Flank wear lengths for various cooling conditions were measured and analyzed. It was observed that the higher tool life of a Ti-coated alumina ceramic can be achieved under cryogenic cooling technique, as compared to the CBN insert under dry conditions. Cost analysis of these hard turning cases was also conducted to check the feasibility of its usage under realistic shop floor conditions. It was observed that the machining using Ti-coated ceramic under cryogenic jet may reduce the total tooling cost compared to CBN cutting tool conducted under dry conditions.

Qualification of Coatings to Predict Wear Behavior of Micro Blasted Cutting Tools

2010 ◽  
Vol 438 ◽  
pp. 23-29 ◽  
Author(s):  
Fritz Klocke ◽  
Christof Gorgels ◽  
Arne Stuckenberg ◽  
Emmanouil Bouzakis
Keyword(s):  
Tool Life ◽  
Zirconium Oxide ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Production Engineering ◽  
Coating Technology ◽  
Testing Method ◽  
Increase Tool Life ◽  
Tool Treatment

In today’s production engineering nearly every cutting tool is coated. In the field of coating technology and tool treatment blasting is a common way to increase tool life or hold it on a constant level for several reconditioning steps. The latest innovation referring blasting are micro blasted coatings. For this technology a parameter variation was examined and the consequential tool life was compared with common testing method for tool systems in order to qualify the coating treatment. The investigations were carried out using an aluminum and zirconium oxide as blasting abrasive and by varying the blasting parameters pressure and duration. Finally, the treatment led to an optimized tool wear behavior due to micro blasting of the coating and the wear behavior could be referenced against the testing methods.

scholarly journals Simple , safe and fast Ponseti cast removal procedure in pes equina varus patients

2021 ◽  
Vol 8 (2) ◽  
pp. 64-67
Author(s):  
Ferdi Dırvar ◽  
Ömer Cengiz
Keyword(s):  
Cutting Tool ◽  
Classical Group ◽  
Cutting Tools ◽  
Ponseti Method ◽  
Idiopathic Clubfoot ◽  
Chi Square ◽  
Removal Time ◽  
Significant Difference ◽  
The Mean ◽  
Mean Time

Objective: In our study, it is aimed to remove the cast more easily and safely without using the cutting tools by leaving the cast ends marked by folding in the idiopathic clubfoot patients treated with Ponseti method. Material and Methods: Forty feet of 29 patients treated for Pes Equinovarus were included in the study. Patients were followed up in two groups. The group treated with Ponseti method by cast marking were named as “modified group” and cast wrapped group without marking were named as “classical group”. Neurological, teratologic and syndromic clubfoot patients were not included in the study. During the six series of casting, cast removal times for each extremity are recorded in minutes and it is noted that whether any additional cutting tool is used during cast removal or not. A summary of the data was presented as mean, standard deviation and percentage. Comparisons of the categorical characteristics were analysed by using the Chi-square test and the Mann-Whitney test. IBM-SPSS 20 program was used for analysis. In all tests, the level of significance was adjusted to 0.05. Results: Thirteen (44.8%) of the 29 patients were male and 16 (55.2%) were female. While the mean time to start treatment for the 15 patients in the modified group was 3.46 (2-7) days, mean time for the 14 patients in the classical group was 3.78 (2-10) days. While the mean cast removal time of the 20 extremities of 15 patients in the modifying group was 10.9 minutes (8-14.3 min);it was 22.2 minutes (17.1-29.5 min) for the 20 extremities of 14 patients in the classical group. While no additional cutting tool was used during cast removal in the modified group, additional cutting tools were used during removal of cast in 75% (15/20) of the patients in the classical group and statistically significant difference was found between two groups in terms of the use of cutting tools (p<0.001). Conclusion: We found that the cast ends’ being marked by folding during plastering in idiopathic clubfoot patients treated with Ponseti technique is costless, easy to apply, significantly shortens cast removal time, does not require the use of cutting tools, and thus is a notably safe method for these patients.

Study on the Performance of Braze Cemented Carbide Cutting Tool

2012 ◽  
Vol 443-444 ◽  
pp. 607-611 ◽  
Author(s):  
Chun Ye Zhang ◽  
Hong Jie Pei ◽  
Qin Feng Li ◽  
Chun Yan Zhang ◽  
Gui Cheng Wang
Keyword(s):  
Cutting Tool ◽  
Cutting Tools ◽  
Cemented Carbide ◽  
Wear Characteristic ◽  
Carbide Cutting Tool ◽  
Cutting Test ◽  
Theory And Experiment

The Cemented carbide cutting tool is widely used in more machining factory, the 5 types of cemented carbide materials: YT30+Ta, YTS25, YH1, 726 and 758 and Selected to make brazing and cutting test. The experiment results shown that: (a) the hardness of cemented carbide cutting tool after being brazed does not change, redoes HRA0.1~0.2; (b) YT30+Ta, YTS25 types of cemented carbide could be brazed using 105# solder, brazing quality could be very well; (c) Wear characteristic of machine-clamping and brazed cemented carbide cutting tool is normal and hardly change in T<150 minutes. The study makes theory and experiment foundation to widely use cemented carbide cutting tools.

scholarly journals An Industrial Vision System to Analyze the Wear of Cutting Tools

2017 ◽  
Vol 869 ◽  
pp. 183-194
Author(s):  
Christina Gillmann ◽  
Tobias Post ◽  
Benjamin Kirsch ◽  
Thomas Wischgoll ◽  
Jörg Hartig ◽  
...  
Keyword(s):  
Image Processing ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Vision System ◽  
Cutting Tools ◽  
Processing Methods ◽  
Comparative Visualization ◽  
Image Series ◽  
Measurement And Evaluation

The wear behavior of cutting tools directly affects the quality of the machined part. The measurement and evaluation of wear is a time consuming and process and is subjective. Therefore, an image-based wear measure that can be computed automatically based on given image series of cutting tools and an objective way to review the resulting wear is presented in this paper. The presented method follows the industrial vision system pipeline where images of cutting tools are used as input which are then transformed through suitable image processing methods to prepare them for the computation of a novel image based wear measure. For multiple cutting tool settings a comparative visualization of the wear measure outputs is presented. The effectiveness of the presented approach is shown by applying the method to measure the wear of four different cutting tool shapes.

ELID Grinding Technology of Nano-Material Cutting Tool

2012 ◽  
Vol 155-156 ◽  
pp. 960-964
Author(s):  
Ji Cai Kuai ◽  
Fei Hu Zhang ◽  
Ya Zhong Liu
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Low Cost ◽  
Cutting Tools ◽  
Cemented Carbide ◽  
Elid Grinding ◽  
Carbide Cutting Tool ◽  
Edge Radius ◽  
Ultra Precision

As ELID grinding technology is characterized by simpleness, practicality, low cost and so on, it is wildly used in ultra-precision sharpening, ultra-precision grinding, ultra-precision polishing and some other fields of difficult-to-cut material. ELID grinding technology was applied in the grinding of cutting tool in this paper, and the cutting tools with nano-grained cemented carbide, common cemented carbide, nanoY-TZP ceramics and some other materials were respectively grinded. Then, the surface quality of their anterior and posterior grinding horns and their edge radius were studied and compared with traditional grinding technology of cutting tool. The results show that the surface roughness and edge radius of nano-grained cemented carbide cutting tool are respectively Ra2nm and 0.3μm, the surface roughness and edge radius of common cemented carbide cutting tool are respectively Ra20nm and 1μm and the surface roughness and edge radius of nanoY-TZP ceramic cutting tool are respectively Ra60nm and 0.2μm after grinding by applying ELID grinding technology, which are far better than that from traditional grinding technology; this further proves that the adoption of ELID grinding technology in the grinding of cutting tool is feasible.

Research on Wear Behavior of Tools while Infeed Cutting Austempered Ductile Iron (ADI) with Ceramic Tools

2007 ◽  
Vol 10-12 ◽  
pp. 605-609
Author(s):  
Xu Hong Guo ◽  
G. Liu ◽  
G.S. Su
Keyword(s):  
Abrasive Wear ◽  
Ductile Iron ◽  
Cutting Tool ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Austempered Ductile Iron ◽  
Rake Face ◽  
Wear Area ◽  
Tools Wear

Cutting tests had been done on the Austempered Ductile Iron (ADI) with ceramic cutting tools. The wear shape of the cutting tool’s surface was observed by the Scanning Electron Microscope (SEM). The micro-wear area of the tools was analyzed with energy spectrum. Study on wear shape and wear mechanisms were done when infeed cutting ADI. The result shows that: the cutting speed is an important factor to the tool wear when infeed cutting ADI with CC650 tool, and with the increase of the cutting speed, the wear value of cutting tool increases obviously. The flank of cutting tool (CC650) has wear land of definite width during cutting, and shows obvious abrasive wear. The crate wear shape of rake face is almost joined to major cutting edge, it is different from the typical crate shape of rake face. Elements Fe, Si and Mg in ADI material diffuses to the surface of cutting tools (CC650) after cutting, the diffusion exacerbates the wear of cutting tools, and the diffusion degree of rake face is larger than that of flank, abrasive wear, adhesive wear and diffusive wear is chief reasons for tools wear.

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