Study on the Cutting Performance of Al2O3-TiC-TiN Ceramic Tool Materials

In this work, two kinds of Al2O3-TiC-TiN ceramic cutting tools (AC2U and AC2UN2) were developed by hot-pressing sintering techniques. The mechanical properties were measured and the cutting performance was investigated. The workpiece used in the cutting experiment was quenched carbon tool steel T10A, and the tool material for comparison was LT55. The wear resistance and the main wear patterns of the ceramic tools were analyzed at the high speed of 300m/min. The results indicated that the novel Al2O3-TiC-TiN ceramic cutting tools showed better cutting performance than LT55, and AC2UN2 was better suitable for machining quenched T10A. When the cutting condition was v=300m/min, f=0.1mm/r and ap=0.1mm, the adhesion wear and abrasive wear of the novel ceramic tools were slighter than those of LT55, the diffusion wear resistance of AC2U was better and the oxidation resistance of AC2UN2 was better.

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Friction and Wear Behaviors of Three Ceramic Composite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.315-316.94 ◽

2006 ◽

Vol 315-316 ◽

pp. 94-97 ◽

Cited By ~ 3

Author(s):

Xue Feng Yang ◽

Jian Xin Deng ◽

Jun Zhou ◽

S.Q. Yao ◽

C. Li

Keyword(s):

Fracture Toughness ◽

Wear Resistance ◽

High Speed ◽

Friction And Wear ◽

Ceramic Composite ◽

Cutting Tools ◽

Test Machine ◽

Flexure Strength ◽

Wear And Tear ◽

Hot Pressing Sintering

Three ceramic composite were prepared by hot pressing sintering. The friction and wear behaviors of the composite were experimented at the high speed wear and tear test machine. Results show that the three ceramic composite have strong fracture toughness and flexure strength. The wear mechanisms of three ceramic composite are mainly brittleness peel off and furrow. Al2O3/(W, Ti)C and Al2O3/SiCw ceramic composite have great capabilities in wear resistance; they are excellent materials of cutting tools and dies.

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Effect of Co Content and WC Grain Size on Wear Resistance of Micro Carbide Endmills in High Speed Milling of Graphite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.407-408.604 ◽

2009 ◽

Vol 407-408 ◽

pp. 604-607

Author(s):

Li Zhou ◽

Cheng Yong Wang ◽

Yu Zhong Li ◽

Zhe Qin

Keyword(s):

Grain Size ◽

Wear Resistance ◽

Tool Wear ◽

High Speed ◽

Impact Resistance ◽

Cutting Tools ◽

Tool Material ◽

Abrasive Resistance ◽

High Speed Milling ◽

Fine Grained

Micro carbide endmills suffer severe abrasive friction and impact wear in high speed milling of graphite. This paper focused on the study of the effect of Co content and WC grain size on the tool wear resistance of micro carbide endmills in high speed milling of graphite. The tool wear morphologies of cutting tools were examined at the initial wear stage and severe wear stage. The results showed that the abrasive resistance of micro carbide endmill increased with the decrease of Co content and WC grain size. The best impact resistance can be obtained with medium Co content and smaller WC grain size. The fine-grained carbide 0.2WC-8%Co is considered as the optimum tool material for high speed milling of graphite.

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Cutting performance of deep cryogenic treated and nitrided HSS cutting tool inserts

Tehnički glasnik ◽

10.31803/tg-20190513114458 ◽

2019 ◽

Vol 13 (3) ◽

pp. 213-217

Author(s):

Sanja Šolić ◽

Zdravko Schauperl ◽

Vlado Tropša

Keyword(s):

Wear Resistance ◽

High Speed ◽

Cutting Tool ◽

Cryogenic Treatment ◽

Single Point ◽

Cutting Tools ◽

Cutting Speed ◽

High Speed Steel ◽

Cutting Performance ◽

Deep Cryogenic Treatment

High speed steel (HSS) is a very important industrial tool material and has been constantly improved for different wear resistance applications and cutting tools, i.e. drills, milling cutters, hobs and for the cutting tools in which the economical cutting speed is too low for choosing the carbide tools. The properties of HSS depend significantly on the parameters of the conducted heat treatment. In this paper, the influence of deep cryogenic treatment in combination with nitriding of metallurgical powder metallurgy HSS on the wear resistance was measured. Additionally, the cutting performance in a single point cutting tool machinability test at the configuration of the dry low-speed turning of steel was investigated. The results showed that deep cryogenic treatment itself, and in combination with nitriding, resulted in the reduction of the wear rate. The results of the single point cutting tool machinability test showed that deep cryogenic treated and nitrided HSS inserts performed worse than the classically heat-treated inserts and deep cryogenic treated HSS inserts exhibited approximately the same flank wear as the nitrided ones.

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Effects of Cooling Conditions on Thermal Crack Initiation of Brittle Cutting Tools during Intermittent Cutting

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.656-657.237 ◽

2015 ◽

Vol 656-657 ◽

pp. 237-242

Author(s):

Kenji Yamaguchi ◽

Tsuyoshi Fujita ◽

Yasuo Kondo ◽

Satoshi Sakamoto ◽

Mitsugu Yamaguchi ◽

...

Keyword(s):

Crack Initiation ◽

Thermal Shock ◽

High Speed ◽

Cutting Tools ◽

Cutting Speed ◽

Cutting Condition ◽

Thermal Crack ◽

Cooling Conditions ◽

Cutting Operation ◽

Intermittent Cutting

It is well known that a series of cracks running perpendicular to the cutting edge are sometimes formed on the rake face of brittle cutting tools during intermittent cutting. The cutting tool is exposed to elevated temperatures during the periods of cutting and is cooled quickly during noncutting times. It has been suggested that repeated thermal shocks to the tool during intermittent cutting generate thermal fatigue and result in the observed thermal cracks. Recently, a high speed machining technique has attracted attention. The tool temperature during the period of cutting corresponds to the cutting speed. In addition, the cooling and lubricating conditions affect the tool temperature during noncutting times. The thermal shock applied to the tool increases with increasing cutting speed and cooling conditions. Therefore, to achieve high-speed cutting, the evaluation of the thermal shock and thermal crack resistance of the cutting tool is important. In this study, as a basis for improving the thermal shock resistance of brittle cutting tools during high-speed intermittent cutting from the viewpoint of cutting conditions, we focused on the cooling conditions of the cutting operation. An experimental study was conducted to examine the effects of noncutting time on thermal crack initiation. Thermal crack initiation was found to be restrained by reducing the noncutting time. In the turning experiments, when the noncutting time was less than 10 ms, thermal crack initiation was remarkably decreased even for a cutting speed of 500 m/min. In the milling operation, the number of cutting cycles before thermal crack initiation decreased with increasing cutting speed under conditions where the cutting speed was less than 500 m/min. However, when the cutting speed was greater than 600 m/min, thermal crack initiation was restrained. We applied the minimal quantity lubrication (MQL) coolant supply to the intermittent cutting operation. The experimental results showed that the MQL diminished tool wear compared with that under the dry cutting condition and inhibited thermal crack initiation compared with that under the wet cutting condition.

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Wear resistance and cutting performance of high-speed steel ball nose end mills related to the initial state of tool surface

Wear ◽

10.1016/j.wear.2021.203711 ◽

2021 ◽

Vol 472-473 ◽

pp. 203711

Author(s):

A.S. Chaus ◽

M.V. Sitkevich ◽

P. Pokorný ◽

M. Sahul ◽

M. Haršáni ◽

...

Keyword(s):

Wear Resistance ◽

High Speed ◽

High Speed Steel ◽

Steel Ball ◽

Cutting Performance ◽

Initial State ◽

Tool Surface ◽

End Mills

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Cutting Performance and Wear Mechanism of Si3N4-Based Nanocomposite Ceramic Tool

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.443.324 ◽

2010 ◽

Vol 443 ◽

pp. 324-329 ◽

Cited By ~ 1

Author(s):

Bin Zou ◽

Chuan Zhen Huang ◽

Han Lian Liu ◽

Jin Peng Song

Keyword(s):

Wear Resistance ◽

Wear Mechanism ◽

Cutting Tools ◽

Cutting Speed ◽

Cutting Performance ◽

Nano Particles ◽

Ceramic Tool ◽

Tool Materials ◽

High Cutting Speed ◽

The Matrix

Si3N4/TiN nanocomposite tool and Si3N4/Ti(C7N3) nanocomposite tool were prepared. The cutting performance and wear mechanism of Si3N4-based nanocomposite ceramic tool was investigated by comparison with a commercial sialon ceramic tool in machining of 45 steel. Si3N4-based nanocomposite ceramic tool exhibits the better wear resistance than sialon at the relatively high cutting speed. The increased cutting performance of Si3N4-based nanocomposite ceramic tool is ascribed to the higher mechanical properties. Nano-particles can refine the matrix grains and improve the bonding strength among the matrix grains of Si3N4-based nanocomposite ceramic tool materials. It contributes to an improved wear resistance of the cutting tools during machining.

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Diffusion and Oxidation Wear of PCBN Tool when Cutting Materials Difficult-to-Cut Based on Thermodynamics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.538.54 ◽

2014 ◽

Vol 538 ◽

pp. 54-57

Author(s):

Fang Shao ◽

Yu Ting Wang ◽

Li Jing Zou ◽

Yan Ying Wu ◽

Dong Sun

Keyword(s):

High Temperature ◽

High Speed ◽

Cutting Temperature ◽

Tool Material ◽

Diffusion Reaction ◽

Depth Of Cut ◽

Pcbn Tool ◽

Diffusion Wear ◽

Pcbn Tools ◽

Oxidation Wear

Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature, the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection.

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Tribological properties of ion-modified composite coatings

Journal of Physics Conference Series ◽

10.1088/1742-6596/2059/1/012015 ◽

2021 ◽

Vol 2059 (1) ◽

pp. 012015

Author(s):

M Sh Migranov ◽

A M Migranov ◽

S R Shekhtman

Keyword(s):

Wear Resistance ◽

Tool Life ◽

High Speed ◽

Composite Coatings ◽

Cutting Tools ◽

High Speed Steel ◽

Hard Coating ◽

Ion Nitriding ◽

Additional Layer ◽

Nitrided Surface

Abstract The paper presents the results of a study of one of the ways to increase the wear resistance of “duplex” coatings applied to cutting tools, which are due to preliminary diffusion saturation of the tool surface with nitrogen (known as ion nitriding) followed by physical deposition of a hard coating (Ti, Cr) N. The proposed coating also contains an additional layer with an impurity of ions, deposited on a preliminary nitrided surface of high speed steel before the deposition of a hard coating. Tests were carried out to evaluate the effect of these modified layers on the tool life of the HSS tool. The greatest wear resistance after "triplex" - treatment was achieved during ion implantation of titanium into a pre-nitrided surface. The coefficient of friction of the modified layer was studied at different contact temperatures. Ionic mixing contributes to the appearance of a thin surface layer with an amorphous-like structure, which prolongs the stage of normal wear, which significantly increases the tool life as a result of the self-organization process.

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Cutting Performance and Wear Mechanisms of an Al2O3-Based Micro-Nano-Composite Ceramic Tool

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.443.244 ◽

2010 ◽

Vol 443 ◽

pp. 244-249 ◽

Cited By ~ 3

Author(s):

Yong Hui Zhou ◽

Jun Zhao ◽

Xing Ai

Keyword(s):

Failure Modes ◽

Cutting Tools ◽

Tool Material ◽

Composite Ceramic ◽

Cutting Performance ◽

Nano Particles ◽

Ceramic Tool ◽

Nano Composite ◽

Micro Particles ◽

1045 Steel

An Al2O3-based composite ceramic cutting tool material reinforced with (W, Ti)C micro-particles and Al2O3 micro-nano-particles was fabricated by using hot-pressing technique, the composite was denoted as AWT. The cutting performance, failure modes and mechanisms of the AWT micro-nano-composite ceramic tool were investigated via continuous turning of hardened AISI 1045 steel in comparison with those of an Al2O3/(W, Ti)C micro-composite ceramic tool SG-4 and a cemented carbide tool YS8. Worn and fractured surfaces of the cutting tools were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The results of continuous turning revealed that tool lifetime of the AWT ceramic tool was higher than that of the SG-4 and YS8 tools at all the tested cutting speeds. The longer tool life of the AWT composite ceramic tool was attributed to its synergistic strengthening/toughening mechanisms induced by the (W, Ti)C micro-particles and Al2O3 nano-particles.

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