Wear mechanisms of PcBN cutting tools when dry turning ASTM Grade 2 austempered ductile iron under finishing conditions

Katuku, Kambuyi; Koursaris, A.; Sigalas, Iakovos

doi:10.1016/j.wear.2009.08.027

Cited by 21 publications

(8 citation statements)

References 10 publications

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“…Oxidation of PCBN, another type of chemical interaction, has also been investigated. The presence of boron oxide among the wear products on a PCBN tool has been experimentally verified [8]. Similarly, oxidation wear of PCBN has been found in machining hardened tool steel, activated only under accelerated process conditions [9].…”

Section: Introductionmentioning

confidence: 76%

On chemical and diffusional interactions between PCBN and superalloy Inconel 718: Imitational experiments

Bushlya

Bjerke

Turkevich

et al. 2019

Journal of the European Ceramic Society

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On chemical and diffusional interactions between PCBN and superalloy Inconel 718Imitational experiments Bushlya, V.; Bjerke, A.; Turkevich, V. Z.; Lenrick, F.; Petrusha, I. A.; Cherednichenko, K. A.; Ståhl, J. E. AbstractDuring a metal cutting process, chemical wear can become the dominant mechanism of tool degradation under the high temperatures and contact pressures that arise between the tool and the metal workpiece. This study focuses on the chemical and diffusional interactions between superalloy Inconel 718 and cubic boron nitride (cBN) tool material with and without TiC binder. It covers thermodynamic modeling and experimental tests in the pressure range of 0.1 Pa to 2.5 GPa at temperatures up to 1600 °C. The methods used include diffusion couples under both vacuum and high pressure, transmission electron microscopy (TEM) analysis and in-situ synchrotron observations. It is shown that cBN is prone to diffusional dissolution in the metal and to reactions with niobium, molybdenum, and chromium from Inconel 718. Adding TiC binder changes the overall degradation process because it is less susceptible to these interaction mechanisms.

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Section: Introductionmentioning

confidence: 76%

On chemical and diffusional interactions between PCBN and superalloy Inconel 718: Imitational experiments

Bushlya

Bjerke

Turkevich

et al. 2019

Journal of the European Ceramic Society

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“…Refs. [5][6][7][8][9][10][11][12][13][14][15]). In general, in these studies, microstructures and properties of studied PcBN tools are rarely invoked as an experimental variable.…”

Section: Introductionmentioning

confidence: 99%

Small-scale mechanical properties of constitutive phases within a polycrystalline cubic boron nitride composite

Besharatloo

Gordon

Rodriguez-Suarez

et al. 2019

Journal of the European Ceramic Society

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…Combining FEA with the cutting experiments, Özel et al [19,20] conducted comparative research into the wear morphology and wear process of two different PCBN tools with a variable rounded edge and an invariable chamfered edge. In addition, other researchers have focused on the tool wear mechanisms, such as abrasive wear, bond wear, diffusion wear, and chemical wear, during hard turning [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Wear Characteristics of PCBN Tool with Variable Chamfered Edge

Chen

Lixing

et al. 2019

Chin. J. Mech. Eng.

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Owing to heavy dynamic and thermal loads, PCBN tools are seriously worn during hard cutting, which largely constrains the improvement of their machining performance. Therein, the chamfered structure of a cutting edge has a notable influence on the tool wear. Thus, a comparative study was carried out on the wear morphology and wear mechanism of PCBN tools with either a variable chamfered edge or an invariable chamfered edge. The results indicate that, for a PCBN tool with a variable chamfered edge, the rake wear area is far from the cutting edge and slowly extends toward it. A shallow large-area crater wear occurs on the rake face, and the flank wear area has a long triangular shape with a smaller wear area and width, and the cutting edge remains in a good state during the cutting process. In contrast, for a PCBN tool with an invariable chamfered edge, a deep small-area crater appears on the rake face, and the wear area is close to the cutting edge and quickly extends toward it. Thus, it is easy for chips to accumulate in the crater, resulting in large-area and high-speed wear on the flank face. In addition, the tool shows a weak wear resistance. In the initial wear stage, the rake wear mechanism of the two cutting tools is a mixture of abrasive, oxidation, and other types of wear, whereas their flank wear mechanism is dominated by abrasive wear. With an aggravation of the tool wear, the oxidation and diffusion wear mechanism are both increasingly strengthened. The rake wear of the cutter with a variable chamfered edge showed an obvious increase in the oxidation and diffusion wear, as did the flank wear of the cutter with an invariable chamfered edge. This study revealed the wear mechanism of the PCBN tool with a variable chamfered edge and provided theoretical and technological support for its popularization and application in the machining of high-hardness materials.

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Wear mechanisms of PcBN cutting tools when dry turning ASTM Grade 2 austempered ductile iron under finishing conditions

Cited by 21 publications

References 10 publications

On chemical and diffusional interactions between PCBN and superalloy Inconel 718: Imitational experiments

On chemical and diffusional interactions between PCBN and superalloy Inconel 718: Imitational experiments

Small-scale mechanical properties of constitutive phases within a polycrystalline cubic boron nitride composite

Experimental Study on Wear Characteristics of PCBN Tool with Variable Chamfered Edge

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