Forging tools modification with graphene-like solid lubricant nanoparticles

• Autorzy: Leshchynsky V. , Ignatiev M. , Wiśniewska-Weinert H. , Borowski J. , Rybak T. , Dobrovnik I.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Working conditions of forging tools have become severer with the years. To increase their wear and heat resistance the surface of the tool is coated by CVD/PVD methods. Relatively high friction coefficient of coatings results in high friction losses and low durability of coating films due to high shear stress at tool–workpiece interface. That is why improved self-lubricating system should be developed. Combination of modern coatings (nanostructured, nanolayers, nanocomposites, etc.) with self-lubricating tool design and application of solid lubricant MoS2 and WS2 graphene-like nanoparticles is very promising and effective way to solve existing forging tool problems. Design/methodology/approach: Laser micro-machining technology was applied to fabricate the network of micro-channels which serve like reservoirs for encapsulation of solid lubricant nanoparticles into tool body. Wide ranges of tribological tests on T-10 ball-on-disc tester were carried out to define the optimal geometry and network configuration of micro-channels ensuring generation of a lubricious transfer film at the tribological contact. Findings: As a result, increased tool durability and high forging precision could be reached. Analysis of failure mechanisms for different forging tools were carried out. It was found that one of the important reasons of tool wear is a high friction coefficient between treated material and the tool. Graphene-like nanoparticles of MoS2 solid lubricant were produced by Rolling Cleavage Technology. Paper consist SEM, TEM and AFM analysis of applied coatings and solid lubricant particles. Research limitations/implications: The continuous supply to a sliding area of nanoparticles will be for the first time applied to decrease high shear stress at an interface between forging tool and treated material.The next research step will be the transfer of the developed methods of self-lubrication from samples to real cold forging tools. Originality/value: Analysis of failure mechanisms for different forging tools were carried out.

Słowa kluczowe

EN

forging tools; PVD/CVD coating; graphene-like nanoparticles; solid lubricants; laser micromachining

PL

narzędzia do kucia; powłoki PVD/CVD; nanocząstki grafenopodobne; smary stałe; mikroobróbka laserowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2010
• Tom: Vol. 43, nr 1
• Strony: 341--348
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Leshchynsky V.

• INOP – Metal Forming Institute, ul. Jana Pawla II 14, 61-139 Poznań, Poland

autor

Ignatiev M.

• INOP – Metal Forming Institute, ul. Jana Pawla II 14, 61-139 Poznań, Poland

autor

Wiśniewska-Weinert H.

• INOP – Metal Forming Institute, ul. Jana Pawla II 14, 61-139 Poznań, Poland

autor

Borowski J.

• INOP – Metal Forming Institute, ul. Jana Pawla II 14, 61-139 Poznań, Poland

autor

Rybak T.

• INOP – Metal Forming Institute, ul. Jana Pawla II 14, 61-139 Poznań, Poland

autor

Dobrovnik I.

• GAZELA D.O.O Kajuhova 12, 8270 Krsko, Slovenia

Bibliografia

• [1] W.M. Smith, Surface Materials Processing. Second Edition, Backmann Verlag, Berlin–London–Paris–Warsaw, 2006.
• [2] E.C. Lee, C.Y. Nian, Y.S. Tarng, Design of a materials processing technologies, Archives of Materials Science and Engineering 28 (2007) 48-56.
• [3] H. Long, Quantitative evaluation of dimensional errors of formed components in cold backward cup extrusion Journal of Materials Processing Technology 177 (2006) 591-595.
• [4] K. Holmberg, A. Matthews, H. Ronkainen, Coatings tribology-contact mechanisms and surface design, Tribology International 31/1–3 (1998) 107-120.
• [5] M. Dubar, A. Dubois, L. Dubar, Wear analysis of tools in cold forging: PVD versus CVD TiN coatings, Wear 259 (2005) 1109-1116.
• [6] M. Dubar, A. Dubois, L. Dubar, Wear analysis of tools in cold forging: PVD versus CVD TiN coatings, Wear 259 (2005) 1109-1116.
• [7] L. Lazzarotto, L. Dubar, A. Dubois, P. Ravassard, J.P. Bricout, J. Oudin, A Selection Methodology for Lubricating Oils in Cold Metal Forming Processes, Wear 215 (1998)1-9.
• [8] H. Wiśniewska-Weinert, V. Leshchynsky, M. Ignatiev, J.A. Kozubowska, J. Smalc-Koziorowska, Friction and wear with WS2 nanoparticles under mixed and boundary lubrication. Metals Plastic Forming XIX/1 (2008) 29-40.
• [9] PLATIT, Nanostructured Coatings for High Performance Tools. Werkzeug Technik 1 (2003) 2-8.