Influence of electric spark on hardness of carbon steel

Authors

  • I. O. Vakulenko Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net, Ukraine
  • S. V. Proydak Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net, Ukraine
  • Z. Stradomski Fac. «Technology of Materials Processing and Applied Physics of Institute of Engineering Material Science», Czestochowa University of Technology, al. Armi Krajowej, 19, Czestochowa, Poland, 42-200, tel.+48 (34) 325 07 38, e-mail zbigniew@wip.pcz.pl, Ukraine
  • V. A. Diadko Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net, Ukraine

DOI:

https://doi.org/10.15802/stp2014/23779

Keywords:

microhardness, electric discharges, microstructure, carbon steel

Abstract

Purpose. The purpose of work is an estimation of influence of an electric spark treatment on the state of mouldable superficial coverage of carbon steel. Methodology. The steel of fragment of railway wheel rim served as material for research with chemical composition 0.65% С, 0.67% Mn, 0.3% Si, 0.027% P, 0.028% S. Structural researches were conducted with the use of light microscopy and methods of quantitative metallography. The structural state of the probed steel corresponded to the state after hot plastic deformation. The analysis of hardness distribution in the micro volumes of cathode metal was carried out with the use of microhardness tester of type of PMT-3. An electric spark treatment of carbon steel surface was executed with the use of equipment type of EFI-25M. Findings. After electric spark treatment of specimen surface from carbon steel the forming of multi-layered coverage was observed. The analysis of microstructure found out the existence of high-quality distinctions in the internal structure of coverage metal, depending on the probed area. The results obtained in the process are confirmed by the well-known theses, that forming of superficial coverage according to technology of electric spark is determined by the terms of transfer and crystallization of metal. The gradient of structures on the coverage thickness largely depends on development of structural transformation processes similar to the thermal character influence. Originality. As a result of electric spark treatment on the condition of identical metal of anode and cathode, the first formed layer of coverage corresponds to the monophase state according to external signs. In the volume of coverage metal, the appearance of carbide phase particles is accompanied by the decrease of microhardness values. Practical value. Forming of multi-layered superficial coverage during electric spark treatment is accompanied by the origin of structure gradient on a thickness. The effect of the superficial work-hardening from a spark according to a level can be an alternative to majority of thermal and chemical-thermal technologies of treatment of metallic materials. 

Author Biographies

I. O. Vakulenko, Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net

И. А. Вакуленко

S. V. Proydak, Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net

С. В. Пройдак

Z. Stradomski, Fac. «Technology of Materials Processing and Applied Physics of Institute of Engineering Material Science», Czestochowa University of Technology, al. Armi Krajowej, 19, Czestochowa, Poland, 42-200, tel.+48 (34) 325 07 38, e-mail zbigniew@wip.pcz.pl

З. Страдомски

V. A. Diadko, Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnyzt_texmat@ukr.net

В. А. Дядько

References

Babich V.K., Gul Yu.P., Dolzhenkov I.Ye. Deformatsionnoye stareniye stali [Strain aging of the steel]. Moscow, Metallurgiya Publ., 1972. 320 p.

Bernshteyn M.L. Struktura deformirovannykh metallov [Structure of deformed metals]. Moscow, Metallurgiya Publ., 1977. 431 p.

Vakulenko I.O. Pro vzaiemozviazok strukturnykh peretvoren pry vtomi vuhletsevoi stali z osoblyvostiamy budovy poverkhon ruinuvannia [On the interrelation of structural transformations with fatigue of carbon steel with structure features of the break surfaces]. Vіsnyk Dnіpropetrovskoho natsionalnoho universytetu zalіznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University named after Academician V. Lazaryan], 2010, issue 32, pp. 242-245.

Vakulenko I.O. Strukturnyi analiz v materialoznavstvi [Structural analysis on material science]. Dnipropetrovsk, Makovetskyi Publ., 2010. 124 p.

Vakulenko I.A., Bolshakov V.I. Morfologiya struktury i deformatsionnoye uprochneniye stali [Structure morphology and strain hardening of steel]. Dnipropetrovsk, Makovetskiy Publ., 2008. 196 p.

Vakulenko L.I., Sokirko V.A., Nadezhdin Yu.L. Elektricheskaya impulsnaya obrabotka metalla oboda zheleznodorozhnogo kolesa posle ekspluatatsii [Electric pulse treatment of metal railway wheel rim after operation]. Nauka ta prohres transportu. Vіsnyk Dnіpropetrovskoho natsionalnoho universytetu zalіznychnoho transportu – Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, 2013, no. 1 (43), pp. 126-132.

Verkhoturov A.D., Mukha I.M. Tekhnologiya elektro-iskrovogo legirovaniya metallicheskikh poverkhnostey [Technology of electrospark alloying of metal surfaces]. Kyiv, Tekhnіka Publ., 1982. 181 p.

Grigorovich V.K. Tverdost i mikrotverdost metallov [Hardness and microhardness of metals]. Moscow, Nauka Publ., 1976. 230 p.

Dzugutov M.Ya. Plasticheskaya deformatsiya vysokolegirovannykh staley i splavov [Plastic deformation of high-alloy steels and alloys]. Moscow, Metallurgiya Publ., 1977. 480 p.

Kuzin O.A., Yatsiuk R.A. Metaloznavstvo ta termichna obrobka metaliv [Metal technology and heat treatment of metals]. Kyiv, Osnova Publ., 2005. 324 p.

Myamlin S.V., Vakulenko L.I. Vliyaniye usloviy ekspluatatsii na vnutrenneye stroyeniye metalla zheleznodorozhnykh koles [The influence of operating conditions on the internal structure of metal of railway wheels]. Vіsnyk Dnіpropetrovskoho natsionalnoho universytetu zalіznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2013, no. 42, pp. 164-166.

Vasilyev K.V., Vill V.I., Volchenko V.N. Svarka v mashinostroyenii. Spravochnik. T. 1. [Welding in mechanical engineering. Vol. 1]. Moscow, Mashinostroyeniye Publ., 1978. 504 p.

Kahlon C.S. Electric spark toughening of cutting tools and steel components. International Journal of Machine Tool Design and Research, 1970, vol. 10, pp. 95-121.

Langhammer K. Frasen hochwarmfesten Werkstoffe mit elektrofunkenvrfestgen Schnellarbeitsstahlwerkzeugen. Ind Ans, 1971, Bd. 93, H. 51, pp. 1195-1196.

Penetron carbide deposition and blast – peening equipment. Machinery and production engineering, 1972, vol. 20, no. 3099, pp. 479-480.

Vaidyanathan H. Schlayer. Elektrofunkenverfesting und von werkzeugschneiden. Ind Ans, 1971, Bd. 93, no. 36, pp. 819-820.

Vakulenko I.A., Perkov O.N. Effect of the morphology and size of iron carbide on the fatigue strength of carbon steels. Russian Metallurgy, 2008, no. 3, pp. 225-228.

Published

2014-04-25

How to Cite

Vakulenko, I. O., Proydak, S. V., Stradomski, Z., & Diadko, V. A. (2014). Influence of electric spark on hardness of carbon steel. Science and Transport Progress, (2(50), 95–102. https://doi.org/10.15802/stp2014/23779

Issue

Section

MATERIAL SCIENCE