scholarly journals Development and Characterization of Si3N4 Coated AlCrN Ceramic Cutting Tool

2010 ◽  
Vol 660-661 ◽  
pp. 697-700
Author(s):  
José Vitor C. Souza ◽  
Maria do Carmo de Andrade Nono ◽  
Olivério Moreira Macedo Silva ◽  
G.V. Martins ◽  
João Paulo Barros Machado ◽  
...  
Keyword(s):  
Physical Vapor Deposition ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Surface Hardness ◽  
Life Time ◽  
Grazing Incidence ◽  
Ceramic Cutting Tool ◽  
Substrate Properties ◽  
Manufacturing Technologies

Nowadays, silicon nitride based cutting tools are used to machine cast iron from the automotive industry and nickel superalloys from the aero industries. Advances in manufacturing technologies (increased cutting speeds, dry machining, etc.) induced the fast commercial growth of physical vapor deposition (PVD) coatings for cutting tools, in order to increase their life time. In this work, a new composition of the Si3N4 ceramic cutting tool was developed, characterized and subsequently coated, using a PVD process, with aluminum chromium nitride (AlCrN). The Si3N4 substrate properties were analyzed by XRD, AFM, hardness and fracture toughness. The AlCrN coating was analyzed by AFM, grazing incidence X-ray diffraction (GIXRD) and hardness. The results showed that this PVD coating could be formed homogeneously, without cracks and promoted a higher surface hardness to the insert and consequently it can produce a better wear resistance during its application on high speed machining.

Hard Nano-Crystalline Coatings for Cutting Tools

2007 ◽  
Vol 567-568 ◽  
pp. 185-188 ◽  
Author(s):  
Miroslav Piska
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Dry Cutting ◽  
Nano Crystalline ◽  
The Right ◽  
Machining Productivity ◽  
Hard Cutting ◽  
Cutting Tool Materials

Modern trends in metal cutting, high speed/feed machining, dry cutting and hard cutting set more demanding characteristics for cutting tool materials. The exposed parts of the cutting edges must be protected against the severe loading conditions and wear. The most significant coatings methods for cutting tools are PVD and CVD/MTCVD today. The choice of the right substrate or the right protective coating in the specific machining operation can have serious impact on machining productivity and economy. In many cases the deposition of the cutting tool with a hard coating increases considerably its cutting performance and tool life. The coating protects the tool against abrasion, adhesion, diffusion, formation of comb cracks and other wear phenomena.

scholarly journals INVESTIGATION OF THE METHOD OF PROCESSING HOLES WITH A ROTARY CUP CUTTER WITH SURFACING

2021 ◽  
pp. 1-6
Author(s):  
Bakytzhan Donenbayev ◽  
Karibek Sherov ◽  
Assylkhan Mazdubay ◽  
Aybek Sherov ◽  
Medgat Mussayev ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Large Diameter ◽  
Cutting Tools ◽  
Experimental Studies ◽  
Surface Hardness ◽  
Hard Metal ◽  
Metal Plates ◽  
Study Results ◽  
The Cost

This article presents the experimental study results of the process of rotational friction holes boring using a cup cutter surfaced by STOODY M7-G material. As a result of experimental studies, the following quality indicators were achieved: surface roughness within Ra=10÷1,25 micrometer; surface hardness within HB 212-248. Using a cup cutter surfaced by STOODY M7-G material in case of rotational friction boring of large-diameter holes for large-sized parts can improve processing performance in comparison with cutting tools equipped with hard metal plates and provided the required surface roughness. Preliminary calculations showed that the manufacture of cup cutters from non-instrumental materials reduces the cost of the cutting tool by 5-7 times and the cost of the operation by 1.5-2 times.

α-SiAlON: Development and Machining Test on Gray Cast Iron

2008 ◽  
Vol 591-593 ◽  
pp. 565-571 ◽  
Author(s):  
Olivério Moreira Macedo Silva ◽  
Maria do Carmo de Andrade Nono ◽  
José Vitor C. Souza ◽  
M.V. Ribeiro
Keyword(s):  
Cast Iron ◽  
Cutting Tool ◽  
Gray Cast Iron ◽  
Cutting Tools ◽  
Grey Cast Iron ◽  
Gray Cast ◽  
Machining Parameters ◽  
Ceramic Cutting Tool ◽  
Sialon Ceramic ◽  
Grey Cast

The α-SiAlON ceramic cutting tool insert is developed. Silicon nitride and additives powders are pressed and sintered in the form of cutting tool inserts at temperature of 1900 oC. The physics and mechanical properties of the inserts like green density, weight loss, relative density, hardness and fracture toughness are evaluated. Machining studies are conducted on grey cast iron workpiece to evaluate the performance of α-SiAlON ceramic cutting tool. In the paper the cutting tool used in higher speed showed an improvement in the tribological interaction between the cutting tools and the grey cast iron workpiece resulted in a significant reduction of flank wear and roughness, because of better accommodation and the presence of the graphite in gray cast iron. The above results are discussed in terms of their affect at machining parameters on gray cast iron.

Influence of Surface Pretreatment on Carbon Coating of Cutting Tools Using PVD

2012 ◽  
Vol 236-237 ◽  
pp. 530-535
Author(s):  
D.N. Awang Shri ◽  
J. Ramli ◽  
N.A. Alang ◽  
M.M. Mahat
Keyword(s):  
Adhesion Strength ◽  
Physical Vapor Deposition ◽  
Carbon Coating ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Rake Angle ◽  
Acid Etching ◽  
Surface Pretreatment ◽  
Force Microscopy ◽  
Atomic Force

Alumina (Al2O3) cutting tools have been coated with carbon coating using physical vapor deposition (PVD) to improve its wear resistance. The cutting tools were subjected to surface pretreatments namely blasting and acid etching to improve the coating adhesion onto the substrates. The effects of pretreatments on the cutting tools topography prior to deposition were investigated using atomic force microscopy (AFM) while the surface morphology was investigated using scanning electron microscopy (SEM). The rake angle of the coated cutting tool and surface roughness of the cutting edge were investigated using infinite focus microscope. The adhesion strength of the carbon coating was investigated using microscratch. This study shows that although the coating were deposited evenly on all samples, the cutting tool that was blasted prior to deposition has better adhesion strength when compared to acid etching and no-pretreatment.

The Application of FEA in High-Speed Cutting Tool

2011 ◽  
Vol 314-316 ◽  
pp. 1258-1261
Author(s):  
Lian Qing Ji ◽  
Kun Liu
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Material Model ◽  
Friction Model ◽  
High Speed Cutting ◽  
Key Technologies

The history and application of the FEA are briefly presented in this paper. Several key technologies such as the building of material model, the establishment of the chip - tool friction model as well as meshing are described. Taking the high-speed cutting of titanium alloy (Ti - 10V - 2Fe - 3Al) as an example , reasonable cutting tools parameters are determined by simulating the influences of cutting temperature, cutting force on the tools parameters using FEA.

Development of Smart Tooling Concepts Applied to Ultraprecision Machining

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Chao Wang ◽  
Kai Cheng ◽  
Richard Rakowski
Keyword(s):  
Cutting Force ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Feedback Signal ◽  
Ultraprecision Machining ◽  
Precision Turning ◽  
High Speed Drilling ◽  
Smart Machining ◽  
Spindle Development

This paper presents smart tooling concepts applied to ultraprecision machining, particularly through the development of smart tool holders, two types of smart cutting tools, and a smart spindle for high-speed drilling and precision turning purposes, respectively. The smart cutting tools presented are force-based devices, which allow measuring the cutting force in real-time. By monitoring the cutting force, a suitable sensor feedback signal can be captured, which can then be applied for the smart machining. Furthermore, an overview of recent research projects on smart spindle development is provided, demonstrating that signal feedback is very closely correlated to the drilling through a multilayer composite board. Implementation aspects on the proposed smart cutting tool are also explored in the application of hybrid dissimilar material machining.

Analytical Expression of T-vC Dependence in Standard ISO 3685 for Cutting Ceramic

2011 ◽  
Vol 480-481 ◽  
pp. 317-322 ◽  
Author(s):  
Anton Panda ◽  
Ján Duplák ◽  
Jozef Jurko
Keyword(s):  
Main Part ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Life Time ◽  
Technical Science ◽  
Analytical Expression ◽  
Cutting Ceramic

Durability is very important property of every cutting material. This property of cutting materials defined theirs life-time. Technical science defines a lot of different factors, that they may be cause of shorter life-time of cutting tool. Maximally possible elimination of these factors is necessary for optimization of cutting materials life-time. Durability of cutting materials is defined in standard ISO 3685. The main part of standard ISO 3685 is T-vc dependence definition for selected cutting materials. One of these cuting materials contained in this standard is cutting ceramic. Standard ISO 3685 contains instructions how to create T-vc dependence for cutting tools made of cutting ceramic. In this standard are only instructions how to create T-vc dependence according to Taylor, but last part of every experiment is analytical expression of tested dependence. The article describes process how to define and analytically express T-vc dependence for cutting ceramic (Al2O3).

Study of Interlayer Element Effect on Properties of AlCrTiSiN Thin Film

2014 ◽  
Vol 893 ◽  
pp. 543-549 ◽  
Author(s):  
Tharanon Usana-Ampaipong ◽  
Sirawut Prapasuk ◽  
Kawiphong Feung-Im ◽  
Karuna Tuchinda ◽  
Kessaraporn Wathanyu ◽  
...  
Keyword(s):  
High Temperature ◽  
Physical Vapor Deposition ◽  
Room Temperature ◽  
Coefficient Of Thermal Expansion ◽  
Wear Behavior ◽  
Cutting Tools ◽  
Surface Hardness ◽  
Scratch Resistance ◽  
Tribological Performance ◽  
Cathodic Arc

In this work, the effect of different interlayer elements on the properties of the top AlCrTiSiN film, i.e. titanium and chromium called as Ti/AlCrTiSiN and Cr/AlCrTiSiN, respectively, was studied. The film was deposited by cathodic arc physical vapor deposition on tungsten carbide (WC) specimen which is extensively used as cutting tools material. Various properties including the surface hardness, the scratch resistance and tribological performance were later studied. The surface hardness of both Ti/AlCrTiSiN and Cr/AlCrTiSiN coatings were higher than 29 GPa. The critical load for both coating suggesting supurb adhesion strength of the coating system. However, Ti interlayer was found to result in higher critical compressive stress for first damage and full delamination at room temperature. The wear resistance of coated specimens was far better than the uncoated one both at room temperature and high temperature, i.e. ball on disc tests at room temperature, 300 °C, and 500 °C were performed. The coeeficient of friciton of both coatings were found to depend strongly on the wear behavior of the system and the characters of the wear debris. A sign of better tribological performance at high temperature, i.e. 500°C, could be noticed with Cr interlayer as the lower mismatch in coefficient of thermal expansion became more crucial in film damage phenomina at such temperature.

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