TVRDE LEGURE ZA NAVARIVANJA ZUBA BAGERA

AUTHOR(S) / АУТОР(И): Maja B. Poser, Filip Zdraveski, Martin Petrevski, Milos Pavlović, Vladan Jeremić

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DOI: 10.46793/Zavarivanje24.S2.5P

ABSTRACT / САЖЕТАК:

Kapacitet rotobagera u značajnoj meri zavisi od zuba za kopanje. Abrazivno habanje reznih zuba i reznih ivica je tipično kada se kopa pesak, peskovita glina i šljunak u uobičajenom kamenom okruženju. Od posebnog značaja je doprinos pravilne geometrije zubaca, njihovog položaja na korpu, a posebno njihove oštrine, koju vremenom gube. Vremenom zubi postaju tupi zbog abrazivnog habanja i menja se njihova geometrija. Otpor kopanja postaje veći, a samim tim i efikasnost rotobagera se smanjuje. Belo liveni gvožđe se izdvaja kao osnovna legura koja ima otpornost na habanje, ali ima nisku žilavost i često dolazi do krtog loma pod udarnim opterećenjem. Manganski čelik, iako ima svojstvo jačanja, pri kopanju u pesku nema otpornost na habanje. Ovo stanje se može poboljšati odabirom nekog materijala otpornijeg na abrazivno dejstvo. Zubi bagera koji otkazuju usled abrazivnog habanja mogu se zaštititi od abrazivnog habanja upotrebom tvrdog oblaganja. Ove tvrde legure su predstavljene u ovom radu.

KEYWORDS / КЉУЧНЕ РЕЧИ:

[1] J.E. Fernandez, R.Vijande, R. Tucho, J. Rodriguez, A. Martin, Materials selection to excavator teeth in mining industry, Wear 250 (2001), pp.11-18

[2] S.Singa, A.S.Kang, J.S. Grewal, G.S. Cheema, Wear behavior of weld overlays on excavator bucket teeth, Procedia Material Science 5 (2014), pp.256-255

[3] R.Ismail, Z.Muhammad, J.Jamari, A.P.Bayuseno, Designing and wear testing of excavator bucket teeth for the need of indonesian mining, ARPN Journal of Engineering and Applied Sciences, vol.15 no.1 (2020), pp.21-26

[4] S.Singa, V.Shibe, J.S.Grewal, Comparative study of hard faced excavator bucket teeth against abrasive wear using MMAW process, International Journal of Materials Science and Engineering, vol.2 no.1-2 (2011), pp.5-8

[5] A. Kang, J.S. Grewal, D.Jain, S.Kang, Wear behavior of thermal spray coatings on rotavator blades, Journal of Thermal Spray Technology 21-2 (2012), pp.355-359

[6] Shibe, V.; Chawla, V. An overview of research work in hardfacing, Mech. Confab 2 (2013), pp.105–110

[7] D.Tandon, H.Li, Z.Pan, D.Yu, W.Pang, A Review on Hardfacing Process Variables, Challenges, and Future Works, Metals 13-9 (2023), pp.1512

[8] Ahn, D.-G. Hardfacing technologies for improvement of wear characteristics of hot working tools: A Review, Int. J. Precis. Eng. Manuf. 14 (2013), pp.1271–1283

[9] Venkatesh, B.; Sriker, K.; Prabhakar, V.S.V.Wear Characteristics of Hardfacing Alloys: State-of-the-art, Procedia Mater. Sci. 10 (2015), pp.527–532

[10] Digambar, B.S.; Choudhary, D. A review paper on hardfacing processes, materials, objectives and applications. Int. J. Sci. Res. 3 (2014), pp.2400–2402

[11] Pradeep, G.R.C.; Ramesh, A.; Prasad, B.D, A review paper on hardfacing processes and materials, Int. J. Eng. Sci. Technol. 2 (2010), pp.6507–6510.

[12] Venkatesh, B.; Sriker, K.; Prabhakar, V.S.V.Wear Characteristics of Hardfacing Alloys: State-of-the-art, Procedia Mater. Sci. 10 (2015), pp.527–532

[13] B. Gerard, Fundamentals of Hardfacing by Arc Welding; Welding Alloys, Florence, KY, USA (2016), pp.1–47

[14] ISO 28080:2021-Hardmetals-Abrasion tests for hard metals

[15] F.Miletic, P.Jovanovic, S.Djenadic, Behavior Determining of Bucket Wheel Drive Depending on the Wear Impact of the Cutting Elements, Procedia Structural Integrity 13 (2018), pp.1644-1650