Electrospark coatings of amorphous and nanocrystalline iron-based alloys
https://doi.org/10.17073/1997-308X-2016-2-63-70
Abstract
The article presents the results of the study covering wear resistant electrospark coatings (ESC) made with electrospark deposition of a steel substrate. The iron based amorphous alloy 2NSR (Fe78B12Si9Ni1) and nanocrystalline alloy 5BDSR (Fe78,5Si13,5B9Nb3Cu1) were used as electrode materials. The ESC structure analysis with scanning electron microscopy and X-rays determined that the 2NSR alloy coating is generally amorphous, while the 5BDSR alloy coating has a nanocrystalline structure that is an amorphous matrix with nanocrystals α-Fe. The microhardness of 2NSR alloy electrospark coating was 7279 MPa at a thickness of 30 microns, and 5BDSR — 10147 MPa at a thickness of 33 microns, that is about 1.5 times thicker than the VK6-OM alloy coating. Tribotechnical tests revealed that the 2NSR alloy electrospark coating has wear resistance 4 times higher than that of 5BDSR at the stage of steady wearing. However, its wear rate was 1,3 times higher at the stage of running. Performance tests found that the coating made of 5BDSR nanocrystalline alloy extends the life cycle of cutting machine parts running in abrasive wear conditions by at least 1,4 times.
About the Author
I. S. Kuznetsov
Orel State Agrarian University
Russian Federation
Russian Federation
Ph.D. (Eng), Senior Teacher of the Department «Reliability and repair of cars»,
302019, Orel, Gen. Rodina str., 69
References
1. Zamulaeva E.I., Levashov E.A., Kudryashov A.E. Effect of WC–CO electrode structure on the rate of electrospark coating deposition. Metallurgist. 2012. Vol. 55. No. 9-10, P. 628—633.
2. Levashov E.A., Pogozhev Y.S., Sviridova T.A., Zamulaeva E.I. Petrzhik M.I., Kudryashov A.E. Formation of protective coatings on steel Kh12MF by the force of the sequential electric spark treatment by boride and carbon-containing electrodes. Russ. J. Non-Ferr. Met. 2014. Vol. 55. No. 2, P. 205—211.
3. Kolomeichenko A.V., Kuznetsov I.S., Kravchenko I.N. Investigation of the thickness and microhardness of electrospark coatings of amorphous and nanocrystalline alloys. Welding Int. 2015. Vol. 29. No. 10. P. 823—825.
4. Kolomeichenko A.V. Kuznetsov I.S. Tribotechnical properties the electrospark coating of amorphous and nanocrystalline alloys based on iron. Friction Wear. 2014. Vol. 35. No. 6. Р. 501—504.
5. Cadney S., Brochu M. Formation of amorphous Zr41.2Ti13.8Ni10Cu12.5Be22.5 coatings via the electrospark deposition process. Intermetall. 2008. Vol. 16. No. 4. P. 518—523.
6. Brochu M., Heard D.W.,Milligan J., Cadney S. Bulk nanostructure and amorphous metallic components using the electrospark welding process. Assembly Automation. 2010. Vol. 30. No. 3. P. 248—256.
7. Milligan J., Heard D.W., Brochu M. Formation of nanostructured weldments in the Al-Si system using electrospark welding. Appl. Surface Sci. 2010. Vol. 256. No. 12. P. 4009—4016.
8. Cadney S., Goodall G., Kim G., Moran A., Brochu M. The transformation of an Al-based crystalline electrode material to an amorphous deposit via the electrospark welding process. J. Alloys Compounds. 2009. Vol. 476. No. 1-2. P. 147—151.
9. Brochu M., Portillo G. Grain refinement during rapid solidification of aluminumzirconium alloys using electrospark deposition. Mater. Trans. 2013. Vol. 54. No. 6. P. 934—939.
10. Tariq N.H., Hasan B.A., Shakil M., Akhter J.I., Haq M.A., Awan N.A. Electron beam brazing of Zr62Al13Ni7Cu18 bulk metallic glass with Ti metal. Vacuum. 2014. Vol. 101. P. 98—101.
11. Heard D.W., Brochu M. Development of a nanostructure microstructure in the Al-Ni system using the electrospark deposition process. J. Mater. Process. Technol. 2010. Vol. 210. No. 6-7. P. 892—898.
12. Aksenov L.B., Petrov V.M., Kudryashov A.E., Galyshev A.A. Sravnitel’naya iznosostoikost’ pokrytii elektroiskrovogo legirovaniya c primeneniem SVS-elektrodov s nanodispersnymi modifikatorami [Comparative wear resistance of coatings of electrospark doping with application of SHS-electrodes with nanodispersed modifiers]. Metalloobrabotka. 2010. No. 3. P. 15—19.
13. Levashov E.A., Pogozhev Y.S., Kudryashov A.E., Rupasov S.I., Levin V.V. Dispersno-uprochnennye nanochastitsami kompozitsionnye materialy na osnove TiC–Ni dlya elektroiskrovogo legirovaniya [Dispersion-hardened by nanoparticles the composite materials based on TiCNi for electrospark doping]. Izv. vuzov. Poroshk. metallurgiya i funkts. pokrytiya. 2008. No. 2. P. 17—24.
14. Nikolenko S.V., Pyachin S.A., Burkov A.A. Formation of electrospark coatings of the VK8 hard alloy with the Al2O3 additive. R. J. Non-Ferr. Met. 2011. Vol. 52. No. 1. P. 56—61.
15. Vereshchagin M.N., Goranskii G.G., Kukareko V.A. Structure and tribological properties of amorphous alloys based on iron and nickel. Friction Wear. 2012. Vol. 33. No. 3. Р. 181—183.
16. Lyuzgin D.V., Inoue А. Obtaining and nanocrystallization of metallic glasses (review) Pt. I. Mater. Technol. 2008. No. 11. P. 41—50.
17. Glezer А.М. Plotnikova M.P., Shalimova A.V., Dobatkin S.V. Severe plastic deformation of amorphous alloys: i. structure and mechanical properties. Bull. RAS. Physics. 2009. Vol. 73. No. 9. P. 1233—1239.
18. Kuznetsov I.S. Jelektroiskrovaja tehnologija uprochnenija detalej rezhushhego apparata zhatok jelektrodami iz amorfnyh i nanokristallicheskih splavov [Electrospark technology of strengthening of reaper cutting apparatus details by electrodes from amorphous nanocrystalline alloys]: Diss. Cand. Sci. (Eng.). Saransk: Mordovskij Gosudarstvennyj Universitet, 2013.
19. Shurygina N.A., Glezer A.M., Permyakova I.E., Blinova E.N. Vlijanie nanokristallizacii na mehanicheskie i magnitnye svojstva splava tipa FINEMET (Fe78.5Si13.5B9Nb3Cu1) [Effect of nanocrystallization on the mechanical and magnetic properties of FINEMET-type alloy (Fe78.5Si13.5B9Nb3Cu1)]. Izvestiya RAN. Ser. Fizika. 2012. Vol. 76. No. 1. P. 52—59.
20. Gonchukova N.O., Ratushnyak S.L., Tolochko O.V. Svjaz’ nanokristallizacii i strukturnoj relaksacii v splave Fe73.5Cu1Nb3Si13B9 [Relation between nanocrystallization and structural relaxation in the Fe73.5Cu1Nb3Si13.5B9 alloy]. Fizika i khimiya stekla. 2011. Vol. 37. No. 4. P. 488—500.
21. Ratushnyak S.L., Gonchukova N.O. Cvyaz’ mezhdu nachalom kristallizatsii i vnutrennimi napryazheniyami v amorfnykh splavakh na osnove zheleza [The connection between the onset of crystallization and inner tension in amorphous alloys based on iron]. Fizika i khimiya stekla. 2012. Vol. 38. No. 6. P. 926—930.
Review
For citations:
Kuznetsov I.S. Electrospark coatings of amorphous and nanocrystalline iron-based alloys. Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya). 2016;(2):63-70. (In Russ.) https://doi.org/10.17073/1997-308X-2016-2-63-70
Views:
911
Email this article 