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1

The Impact of Biodegradable Cutting Fluid on the Tribological Properties of the Friction Pairs

Ozimina D., Kowalczyk J., Madej M.

Tribologia

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2016

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nr 1

67--78

PL

W artykule przedstawiono wyniki badań tribologicznych na testerze T-01 M pracującym w skojarzeniu trącym kula-tarcza w ruchu ślizgowym. Testy zrealizowano dla tarcz ze stali HS6-5-2C bez powłoki i z powłoką TiAlN naniesioną techniką fizycznego osadzania z fazy gazowej PVD oraz kul ze stali 100Cr6. Badania wykonano w warunkach tarcia technicznie suchego i ze smarowaniem cieczą chłodząco-smarującą zawierającą dodatek uszlachetniający – asparginian cynku. Obserwacje struktury powłoki zrealizowano przy użyciu mikroskopu skaningowego SEM JSM - 7100F. Analizę struktury geometrycznej powierzchni tarcz oraz kul przed i po testach tribologicznych wykonano profilometrem optycznym Talysurf CCI Lite. Użyta do badań ciecz obróbkowa wpłynęła na zmniejszenie oporów ruchu oraz dodatkowo zapewniła ochronę antykorozyjną w czasie prowadzenia testów.

EN

This paper discusses the results of wear tests performed with a T-01 M tribometer for a ball-on-disc configuration in sliding contact. The tests were carried out for HS6-5-2C steel discs with and without a TiAlN coating deposited by physical vapour deposition (PVD), which were in contact with 100Cr6 steel balls. The tests were conducted under dry friction conditions and under lubricated friction conditions with a cutting fluid containing zinc aspartate. The coating structure was observed using a JSM - 7100F Canning electron microscope. The surface texture of the discs and the balls was analysed before and after the tribological tests with a Talysurf CCI Lite optical measurement system. The cutting fluid used in the tests contributed to a reduction in the friction resistance and offered anti-corrosion protection.

2

Ocena właściwości tribologicznych powłok smarowanych biodegradowalną cieczą chłodząco-smarującą

Kowalczyk J., Madej M., Ozimina D.

Tribologia

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2015

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nr 5

53--65

PL

W artykule przedstawiono wyniki badań tribologicznych powłok TiAlN osadzanych na stali HS6-5-2C techniką fizycznego osadzania z fazy gazowej PVD. Obserwacje struktury powłoki zrealizowano dzięki użyciu mikroskopu skaningowego SEM JSM – 7100F. Analizy struktury geometrycznej powierzchni powłok TiAlN przed i po testach tribologicznych wykonano profilometrem optycznym Talysurf CCI Lite. Badania tribologiczne przeprowadzono na testerze T-01 M pracującym w skojarzeniu trącym kula–tarcza w ruchu ślizgowym. Testy zrealizowano w warunkach tarcia technicznie suchego i ze smarowaniem cieczą chłodząco-smarującą zawierającą dodatek uszlachetniający – asparginian cynku. Badania wykazały, że ciecz obróbkowa wpłynęła na powstanie przeciwtarciowych warstw granicznych, które zabezpieczyły przed bezpośrednim kontaktem powierzchni współpracujących tarciowo. Wpłynęło to na zmniejszenie oporów ruchu oraz dodatkowo, ze względu na właściwości metaloorganicznych związków cynku, zapewniło ochronę antykorozyjną w czasie prowadzenia testów.

EN

This paper presents the tribological results of on investigations of TiAlN coatings that were deposited on HS6-5-2C steel using the physical vapour deposition PVD technique. An observation of the coating structure was carried out using a scanning electron microscope SEM JSM - 7100F. Examinations of the geometric structures of the surface TiAlN coating before and after tribological tests were performed using an optical profilometer Talysurf CCI Lite. The tribological tests were performed using a T-01 M tester working in a ball-on-disk combination in sliding movement. Tests were carried out under friction with lubrication using cutting fluid containing improved additive-zinc aspartate. Studies have shown that the cutting fluid influenced the formation of anti-wear surface layers, which are secured against the direct contact of rubbing surfaces. This had the effect of reducing the resistance movement and, in addition, provided protection against corrosion during tests.

3

Nanoindentation measurements of PVD coated multilayer constructions

Schulze M., Seidlitz H., König F., Weiß S.

Journal of Achievements in Materials and Manufacturing Engineering

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2015

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Vol. 72, nr 2

53--60

EN

Purpose: Carbon fibre reinforced thermoplastics (CFRP) are intensively used in lightweight applications due to their high strength to weight ratio. In addition they offer good crash, damping and recycling properties. On the basis of their morphology they are suitable for large scale manufacturing processes. A major disadvantage consists of its poor hardness properties, which is again an important requirement to realize a good erosion and wear behaviour. Design/methodology/approach: In this work the application of orthotropic carbon fibre reinforced polymers (PA6), with protective TiAlN coatings, produced by physical vapor deposition (PVD), is investigated. The characterization of the coating is performed by nanoindentation tests, roughness measurements and scanning electron microscopy. Furthermore micro hardness tests on selected well prepared cross sections are conducted, to compare the coating quality with established coating systems. Findings: By applying TiAlN coating, the hardness of the CFRP samples can be increased substantially up to 15 GPa, in comparison to the basic substrate. In addition the quality of the coating surface can be improved significantly by plasma etching pre-treatment. Research limitations/implications: The presented findings are preliminary results to prove the application of a standard processed ceramic coating on new composite types for mass production. The PVD coating process as well as the utilized testing methods are suitable to realize hard coatings on thermoplastic CFRP. This effect can be exploited for several lightweight applications to increase the erosion and wear resistance of composite materials. Originality/value: The presented results show, that ceramic coatings can be deposited on standard thermoplastic CFRP with polyamide 6 matrix. Therewith it can be expected, that the PVD coating process can make a essential contribution to increase the range of applications.

4

Analiza zużycia narzędzi medycznych pokrytych powłokami

Biel-Gołaska M., Kalemba I.

Odlewnictwo - Nauka i Praktyka

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2006

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R. 8, nr 5-6

17-26

PL

Narzędzia medyczne ulegają zniszczeniu nie tylko w wyniku ich użytkowania, lecz przede wszystkim podczas procesu sterylizacji oraz dezynfekcji. W celu zwiększenia ich trwałości eksploatacyjnej, polepszenia zgodności biologicznej oraz odporności na korozję podjęto próbę wytworzenia powłok na próbkach z trzech gatunków stali, przeznaczonych na narzędzia medyczne: stali X15Crl3, X20Cr13 orazX45Cr13. Zastosowano powłoki z azotku tytanu TiN oraz glinoazotku tytanu TiAlN naniesione metodą PAPVD (Plasma Assisted Physical Vapour Deposition). Otrzymane powłoki poddano różnego typu badaniom, takim jak: badania adhezji i właściwości mikromechanicznych, odporności na korozję, biozgodności, chropowatości powierzchni, obserwacjom metalograficznym oraz badaniom eksploatacyjnym. W niniejszym artykule przedstawiono wybrane wyniki tych badań.

EN

Medical tools suffer destruction not only as a result of their operational use, but first of ail during the processes of their sterilization and disinfection. In order to increase their service life, to improve biocompatibility and their corrosion resistance, an attempt was made to manufacture coatings on specimens of three steel grades: X15Cr13, X20Cr13 and X45Cr13, designed for medical tools. Titanium nitride TiN coatings and titanium alumino-nitride TiAlN coatings spread by means of Plasma Assisted Physical Vapour Deposition method were applied. The obtained coatings were subjected to various types of tests, such as: adhesion tests, tests of micromechanical properties, corrosion resistance, biocompatibility, surface roughness, metallographic observations and operational examinations. In the paper some chosen results of these tests have been presented.

5

Tribological behaviour of TiAlN coated carbides in dry sliding tests

Grzesik W., Zalisz Z., Król S.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 17, nr 1-2

181--184

EN

Purpose: The tribological behaviour of the PVD-TiAlN-coated carbide inserts was studied in dry sliding against carbon and stainless steel and cast iron counterparts. The friction and wear effects were examined at variable sliding speeds and normal loads. Design/methodology/approach: A pin-on-disc device with round tool inserts was applied to conduct friction and wear tests in which both the friction coefficient and the linear wear of the tribo-pairs were continuously recorded versus sliding distance. The volumetric wear rate was used to compare the wear resistance of the tribo-pairs tested. Light microscopy (LOM), scanning electron microscopy (SEM) and X-ray microanalyses by EDAX were applied for observations of wear scars and wear products. Findings: Severe adhesive wear of the mating surfaces was found to be predominant mechanism in dry friction between the TiAlN coating and the AISI 304 austenitic steel. In this case the protective TiAlN layer was removed even under the lowest load and sliding speed applied. On the contrary, both TiAlN/C45 and TiAlN/ EN-GJL-300 pairs showed the mild abrasive wear mechanism with the occurrence of tribo-oxidation. For these cases the protective function of the PVD-arc TiAlN layer appeared to be sufficient. Research limitations/implications: The above findings to be transmitted to machining need confirmation in real machining conditions. However, they suggest serious limitations in use of the coatings tested. Practical implications: The results can be helpful in the tool choice for the three materials machined. Originality/value: Some specific frictional behaviours and relevant wear mechanisms observed are highlighted and quantified.