Proceedings of SerbiaTrib '13

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Tablica 2. Rezultati elektrokemijskih korozijskih ispitivanja uzorakaMaterijal/stanjeβ AV/dekβ KV/dekJ corA/cm 2 V cormm/godR pcm 2 AISI304, nitrirano 0,078 0,103 6,62 0,067 3282AISI316L, nitrirano 0,988 0,039 6,71 0,069 5254GS-42CrMo4, poboljšano 0,088 0,598 86,62 1,003 250Ciklička potenciodinamička polarizacijska mjerenjaprovedena su na uzorcima AISI 316L, AISI 304 iGS-42CrMo4 u zasićenoj vodenoj otopini s CO 2 ,vrijednosti pH 4,8 do 5 pri temperaturi 50°C. Naslici 7 prikazan je dijagram cikličke polarizacije, ana slici 8 makrostrukturalne snimke uzoraka.Slika 7. Dijagram cikličke polarizacije nitriranog uzorka 316L, 304 i poboljšanog uzorka GS-42CrMo4Slika 8. Makro prikaz površine nitriranog uzorka 316L, 304 i poboljšanog uzorka GS-42CrMo4nakon cikličke polarizacije4. ANALIZA REZULTATA I ZAKLJUČAKNa poluprstenima izrađenim iz varijantnihmaterijala različitog kemijskog sastava utvrđeni suisti mehanizmi trošenja, pri čemu nisu uočeneznačajnije razlike u intenzitetu, kako abrazijskog iadhezijskog tako i korozijskog trošenja. Analizomuvjeta rada pužnih preša za završno prešanjezaključeno je da se abrazivno djelovanje vrlotvrdog SiO 2 x nH 2 O (oko 1100 HV) ne možeizbjeći, ali se može smanjiti povećanjem tvrdoćedijelova preše. U tome smislu zaključeno je da bi senitriranjem varijantnih materijala moglo doprinijetibitnom povećanju produljenja vijekareprezentantnog tribosustava pužnih preša zazavršno prešanje. Na uzorcima izrađenim iz450 13 th International Conference on Tribology – Serbiatrib’13
varijantnih materijala u dostavnom stanju i unitriranom stanju te na uzorcima osnovnogmaterijala provedena su ispitivanja otpornosti naelektrokemijsku koroziju, kako bi se simuliraliuvjeti agresivne okoline u kojima se odvija raddijelova preše. Rezultati elektrokemijskihispitivanja prikazanih u tablici 2, ukazuju damaterijali AISI 316L i AISI 304 imaju dvadesetputa veće vrijednosti polarizacijskog otpora R p uodnosu na materijal GS-42CrMo4. Vrijednostbrzine korozije za austenitne korozijski postojanečelike je podjednaka i četrnaest puta je manja negoza čelični lijev GS-42CrMo4. Iz dijagrama cikličkihpolarizacija (slika 7) vidljivo je da nitrirani uzorciaustenitnih čelika 316L i 304 ne pokazuju sklonostrupičastoj koroziji niti koroziji u procjepu, dokmaterijala GS-42CrMo4 pokazuje sklonostrupičastoj koroziji i koroziji u procjepu štopotvrđuje makrostrukturalna snimka površinenakon ispitivanja. Analizom navedenih podatakamože se potvrditi da se postupkomnitrokarburiranja u solnoj kupki znatno povećavatvrdoća površine što je bio jedan od traženihzahtjeva. Istovremeno dolazi do povećanja brzinekorozije (0,067 0,069 mm/god), ali ta brzina jeznatno manja od granične vrijednosti koja iznosi0,1 mm/god, prema kriteriju primjenjivosti metala sobzirom na prosječnu brzinu prodiranja općekorozije.LITERATURA[1] T. Filetin, K. Grilec: Postupci modificiranja iprevlačenja površina, Hrvatsko društvo zamaterijale i tribologiju, Zagreb, 2004.[2] V. Ivušić, V. Marušić, K. Grilec: Abrasionresistance of surface layers, VTT Symposium 180&COST516 Tribology Symposium, VTT TechnicalResearche Centre of Finland, pp. 201-210, 1998.[3] G. Rozing, M. Katinić, V. Marušić: Nekespecifičnosti utjecaja dominatnog mehanizmatrošenja na pristup održavanju pužnih preša, 16.Međunarodno savjetovanje ODRŽAVANJE 2010Zagreb: HDO Hrvatsko-društvo održavatelja, pp.120-126, 2010.[4] B. Vasiljević, B. Nedić: Modifikovanje površina,Univerzitet u Kragujevcu, Mašinski fakultet uKragujevcu, Jugoslovensko društvo za tribologiju,Kragujevac, 2003.[5] A. Triwiyanto, P. Hussain, A. Rahman, M.C. Ismail:The Influence of Nitriding Time of AISI 316LStainless Steel on Microstructure and TribologicalProperties, Asian Journal of Scientific Research,Vol.6, pp .323-330, 2013.[6] ASTM G5 – 94: Standard Reference Test Methodfor Making Potentiostatic and PotentiodynamicAnodic Polarization Measurements.STAINLESS STEEL BEHAVIOR UNDER COMBINED CONDITIONS OFWEARAbstract: The key element in the production of raw oil is definitely the worm press, which is used forpressing and extrusion of oil from ground and heated oil seeds. During this process, metal particles areworn from the working surfaces of the press, which indicates that the tribosystem consists of working partsof the press and sunflower seeds. Next to the aforementioned unavoidable wear, damage due to aggressivemedia was also observed. Wear described above indicate that at worm press overcome combined wearconditions. On the test samples made of austenitic staineless steel AISI 316L and AISI 304 nitrocarburisingwas conducted to increase hardness in surface layer, which leads to better tribological properties. In theexperimental part of paper, there were tested corrosion behaviour of samples, chemical composition of basematerial, mechanical properties and microstructure analysis. It was concluded that possible extension of lifetime consists not only in material but also in heat treatment selection, by which increase of hardness will beachieved with reference to better tribological properties with satisfactory corrosion resistance.Keywords: wear, worm press, stainless steel, nitrocarburising, corrosion resistance13 th International Conference on Tribology – Serbiatrib’13 451
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SerbianTribologySocietyFacultyofEng
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Serbian Tribology SocietyUniversity
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Supported byMinistry of Education,
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PrefaceThe International Conference
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ContentsPlenary Lectures1. THE GREE
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27. WEAR CHARACTERISTICS OF HYBRID
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Tribometry57. PRELIMINARY STUDY ON
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Plenary Lectures13 th International
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Serbian TribologySocietySERBIATRIB
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Figure 4. Diagram of the height and
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Realization of the approach is base
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edge without chamfer and smaller ra
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Figure 7. Accumulated tool life in
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Figure 13. Calculated and measured
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Friction deformation of the bronze
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engine cylinders of 2-cylinder-twot
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Table 1: Chemical composition of sa
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Table 4: Comparative wear-resistanc
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- measuring of coating thickness h
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Figure 5. Functional scheme of the
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Table 2. Test results for massive w
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knowledge transfer in the field ofm
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Table 1. Parameters of the electroc
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Figure 6. Wear resistance by linear
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coatings and observed their good we
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c)a)Figure 2: SEM images and micros
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Room temperature 300°CNi/µSiCNiNi
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COF [-] COF [-]Fig.9: COF graphs at
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about 260 nm is related to isolated
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contact’s conformity [18] they ob
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In order to calculate the metallic
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microscopic inspection of the Rp3 s
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otating plate. The shaft passes thr
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similar trends of variation are obs
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smooth, gear fiber-mild steel rough
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[2] Tabor, D.: “Friction and wear
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(10, 50 and 100 N) against surface
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[9] B.R. Gligorijevic, A. Vencl, B.
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dielectric properties, high resista
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parameter, Sv, was slightly influen
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dependence of roughness height and
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Polyethylenes with a molecular weig
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[9] K.S. Kanaga Karuppiah, A.L. Bru
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MgCO3•CaCO3 (13% Mg), and carnall
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fully compatible with MRI/MSCT imag
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5. CONCLUSIONThe magnesium alloys a
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Zinc dialkyldithiophosphate (ZDDP)
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C- Lower deposits with NPNA on comb
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films. Carraro et al. [10] examined
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PlateCount No.Critical Load ( N)120
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solid melt of ZA27 alloy using mech
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SiC particles are uniformly distrib
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in number of micro-cracks and clust
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PBT has the average values of the f
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mechanical pressure and thermal loa
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3. EXPERIMENTAL RESULTSTaking into
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[12] L. Blunt De, X. Jiang: Advance
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2. EXPERIMENTALTESTING2.1 MaterialT
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figure 3a it could be seen that the
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and lubrication is done so that the
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5. CONCLUSIONFigure 11. The accumul
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esistance was found for composite c
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onze, which is embedded within the
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The test contact pair meets the req
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complete. The SEM analysis maycontr
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tg( ) tg 100, [%] (2)tgwhere are:
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corresponding to the maximum value
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electrostatics [17]. Due to the fle
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250nm size have been observed, acco
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ETH Zurich, Switzerland, where all
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comparison with the synthetic reinf
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3. RESULTS AND DISCUSSION3.1 Micros
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(a)(b)Figure 4. Showing (a) variati
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composites. But the composite compo
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coated and uncoated region after ad
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has been measured between the top s
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Fig. 9 shows the wear track obtaine
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Mica samples preparationFor the ads
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According to the AFM results in fig
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[21] B. G. Sharma et al.: Character
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chemical vapor deposition method wi
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analysis (a) and an approximate che
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Table 3. Friction coefficients of s
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A.K.Oleynik, V.M.Matsevity, ea.]. /
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Most of the friction units of produ
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In order to provide both high parts
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Fig. 3. The comparison the criterio
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Table 3. Experimental and calculate
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For developing the numerical model
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,eccentricities and hydrodynamic pr
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hydrodynamic regime. However, for b
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to obtain the temperature distribut
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force (pressure) between two contac
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5E-06The total displacement [m]4.5E
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[11]. Figure 5 shows s the influenc
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efficiency of use, product quality,
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38GSA. The chemical composition, de
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niobium. It should be noted that fo
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Figure 1. Friction force on side su
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exploitation this changing is signi
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2. EFFICIENCY OF CYCLO DRIVEEfficie
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Figure 6. Dependence of cyclo drive
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common for their ability to be inst
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FNF (11)R sin cos11 21 22FNF
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Normal force [N]4000350030002500200
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analytical tests. The analytical te
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Table 4. Results of zero samples of
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noticeable, and by the end of explo
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4. PLASTIC BEARING APPLICATIONSRega
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For Elastohydrodynamic film thickne
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The results concluded for different
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For Thrust Force of 40KNKrytox 215
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Krytox 215 (µ = 0.03204 Pa.s)Figur
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- Reliable exploitation tools, prim
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In addition, as a result of cyclic
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AcknowledgementThe part of this res
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Thepressure angle can be calculated
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mechanism these parameters are fina
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causes big changes of their propert
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Table 2. Impact toughness of some t
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Figure 1. Appearance of fractured f
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implementation of these new manugac
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additional energy is dissipated due
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The adopted geometry parameters are
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4. CONCLUSIONTools of virtual produ
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Figure 2. Structure of the machinin
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3. ANALYSIS OF RESULTSThe results o
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Figure 15. Surface roughness regard
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From the analysis of the diagram it
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comparison from economic, energy co
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Advantages and disadvantages of tra
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The information provided by footwea
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Force (N)5,554,543,532,521,510,50Ex
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additives, that had been, until rec
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Figure 1. Test results for samples
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Table 7. Test results of oil sample
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Input parameters- Current intensity
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edge formed into a thin line. At th
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Lower values of current are not res
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Table 1. Chemical composition of si
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flowable at high temperatures and v
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holes (pits) emerge in the shape of
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[4] W. Schatt, K-P. Wieters, Pulver
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assumption allows us to use, instea
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where P is the load, a - radius of
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determination (total running in tim
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μm, compared with Figure 17, wich
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Serbian TribologySocietySERBIIATRIB
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Especially when the chain transfer
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is obvious that this isa so-calledw
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winches. The authors are inclined t
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find parameters of robot laser hard
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each of which is measured by the le
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Fractal dimensions were determined
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Figure 3. Modified force acting sch
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0.25Lubricant: L3DC 04Friction coef
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nanocomposites. The influence of fi
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4. RESULTS AND DISCUSSION4.1 Morpho
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Figure 6. Loading and unloadin vers
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3 8 12 1 4 2 4
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The material after qualifying the r
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It has already been mentioned that
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Degradation & Stability, Vol. 69, N
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conformance to researchers’ requi
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This part is assembled of pneumatic
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matrixes describe the state of the
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values influence of themeasurement
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Figure 1. Friction stir weldinga -
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(t 2 t
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M fr / T [-] [-]10.90.80.70.60.50.4
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M fr / T [-]10.90.80.70.60.50.40.30
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experimentally determined that for
Page 413 and 414: 4. DISCUSSIONAccording to the theor
Page 415 and 416: Serbian TribologySocietySERBIATRIB
Page 417 and 418: 2.1 The life cycle of the reportThe
Page 419: Obviously the report is checked and
Page 425 and 426: uticaja na osnovu kompozita, a time
Page 427 and 428: 5. ZAKLJUČCIStruktura tiksolivene
Page 429 and 430: dobijene različite karakteristike
Page 431 and 432: vizuelno, na dnevnoj svetlosti, pod
Page 433 and 434: LITERATURA[1] Зинченко В.
Page 435 and 436: Slika 1. Rotorni bager - glodar VII
Page 437 and 438: stvaraju sliku stanja i svoja zapa
Page 439 and 440: njihovih kotrljanih elemenata. Mere
Page 441 and 442: postupka i uticaja parametara depoz
Page 443 and 444: posledica različite raspodele mikr
Page 445 and 446: ZrO 2 Y 2 O 3 je takođe zbog oksid
Page 449 and 450: 3.2 Pneumatska osetljivostOblast pr
Page 451 and 452: p mg (δ), koji je zbog malih struj
Page 453 and 454: PNEUMATIC PROBE HEAD SELECTION FOR
Page 455 and 456: 1. Podsistem kopanja2. Podsistem pr
Page 457 and 458: Slika 3. Kriva habanjaNa tom dijagr
Page 459 and 460: Mjereni su parametri habanja i pril
Page 461 and 462: preše prevladavaju kombinirani uvj
Page 463: a) b)Slika 5. Karakteristična mikr
Page 468 and 469: Jovanović D. 414, 446KKaleicheva J
Page 470 and 471: CIP - Каталогизација
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