erkzeug Technik ISSN Nr. 0997 - 6981€¦ · micro tools DLC1 and DLC2 layers with hydrogen are...
Transcript of erkzeug Technik ISSN Nr. 0997 - 6981€¦ · micro tools DLC1 and DLC2 layers with hydrogen are...
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CYAN MAGENTA JAUNE NOIR
WerkzeugTechnik
Technologie - System - Logistik
Technical magazine for cutting tools and measurement in the manufacturing
ISSN Nr. 0997 - 6981www.werkzeug-technik.com
25 August 2020Nr. 183
Flexible Service with New High-Performance Coatings
Small – Fine – High
nATCRo® can be used for a widerange of cutting tools. Sometimes it is toohard and brittle for forming. You take outthe silicon and use the ALL® layer, whichis depicted as a nanolayer (Ti, Al, Cr)Ncomposition. To improve the glidingbehavior, the ALL® is supplemented witha top tribological layer CrCN (Fig. 2).
With a (or a few) base coating(s) youcannot do innovative job coating today.Adapted layers are required for thevarious applications in order to meetthe requirements of the different users.Let us show a couple of new, interes-ting examples from Pannon:
PannonPlatit [1] is a small but
fine job coating center near to
Budapest, in the heart of
Hungary.
Small – Fine – High
Flexible Service with New High-Performance Coatings
T. Cselle – G. Rabel se. & jr. – F. Csabai
nATCRo – ALL® - Universal for
very different applications
The common universal layers (such asTiN, AlTiN, AlCrN etc.) are of course alsooffered if the customer absolutely wantsthem ...
Pannon has been used nATCRo® as abase layer for many years, over 40% ofsales are generated by this coating. It is ananocomposite layer with a continuousnanolayer structure. It contains Ti, Al, Crand Si, i.e. all elements that form thebackbone of today's PVD layers. It can doreplace all universal layers, namedbefore, and offers higher performanceand enables cost-effective job coatingoperations.
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P annon has been offering a very flexi-ble and fast service since 2005, inclu-
ding pre- and post-treatments (with dryand wet micro-blasting, drag finishing,brushing) and the latest PLATIT® techno-logies with 3 coating units. In addition toconventional ARCs, hybrid (ARC + sput-ter) processes can be carried out.
The basic drive of the company is theproduction of innovative new layers.
COATING ////////////////////////
Fig. 1: New Innovative Coatings,available from PannonPlatit.
We carry out the assessment of thecutting behavior in close cooperationwith the University of Obuda within theframework of EU projects (Fig. 3 [3]).
X + ZrCN - Top layer to avoid
built-up edges
ZrN is a recurring well-knowncoating, primarily used for aluminum
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Fig. 2: Tool life comparison at fine blanking.
Fig. 3: Evaluation of cutting behavior of solid carbide drills [3].
processing. Alone, it performs well as abase layer, but it is too expensive toreplace the TiN. Supplemented withcarbon nitride, it is currently experien-cing a renaissance as a top lubricatinglayer that is overcoated on a hard baselayer.
COATING ////////////////////////
TiXCo® - For hard cutting
and for more
TiXCo® also includes the above 4 basicelements (Ti, Al, Cr, Si), but it is con-structed as a multilayer (CrTiN, CrTiAlN,TiSiN), uses an uppermost, extremelyhard TiSiN top layer, which predestinesthe layer for hard machining.
Impressed by the performance of thelayer in hard machining, the layer wasalso used by customers in other ways.Good results were found at wet graphitecutting even against CVD diamondlayers or at reaming.
The combination of TiB2 and ZrN isinteresting for machining aluminum,whereby the usual 2 layers are doubled.
We were able to achieve particularlyexcellent results when milling (Fig. 4)superalloys (e.g. Nimonic) using thelayer combination nA(T)CRo+Zr(C)Nand BorAC+Zr(C)N [user: Siemens,Budapest].
ta-C - The hard DLC layer
for components and
micro tools
DLC1 and DLC2 layers with hydrogenare based on metals, nitrides, water andcarbon. The carbon (mostly from acety-lene) is deposited as a top layer as alubrication layer [1].
One can speak of hard DLC layers, ofta-C coatings over a 50% proportion ofsp3 crystals. It means a hardness above50 GPa and a roughness smaller than Sa =50 nm. The thin (~ 1um) layer is ideallysuited for coating micro tools and com-ponents that are exposed to constantfrictional loads on the moving compo-nents (Fig. 5).
BorAX - High Entropy Coating:
The next big step in coating
technology?
High entropy alloys are the currenthype in metallurgy. The 5 or more com-ponents form alloys that have signifi-cantly better physical properties thanconventional alloys. E.g. – better strength / weight ratios,– higher bending and tear strength and– higher resistance to corrosion and oxi-
dation.
Why should it be different with coa-tings. The first results of the BorAX =Crn-AlCrTiN/BN/SiN layer prove thisstatement (Fig. 6). The continuous dosing
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Referenzen[1] www.pannonplatit.com[2] Compendium – PLATIT AG, Selzach, Switzerland[3] Evaluation of cutting behavior of drilling tools
University Obuda, Department Machining Technology, Budapest, R&D project,2019-20
[4] Cselle, T.: Flexible hybrid coatings for cutting tools und componentsWorkshop «Innovation by hybrid coating processes, GFE-Schmalkalden, Germany,11/2019
Fig. 4: Milling of turbine blades withan X+ZrCN-coated ball plate.
Fig. 5: Comparison of the frictional torque of different DLC-coatings on a ceramic closure wear element.
Fig. 6: High-Entropy Coating in wear comparison to conventional coatings [4].
of boron enables simultaneous hightoughness with high hardness [4].
(18320-305)
COATING ////////////////////////