METALLOGRAPHIC STUDIES OF SAMPLES MADE OF 65G STEEL SUBJECTED TO COMPLEX TREATMENT BY ELECTROSPARK AND VIBRATION ARC DISCHARGES USING CERMET POWDERS
Abstract
In this paper, some physical and mechanical properties of the surface layer of widely used steel 65G in mechanical engineering and agriculture, subjected to plasma treatment. The research is aimed at increasing the service life of parts and friction units of machinery and equipment. It is shown that vibroplasma surface treatment with the use of metal-ceramic powders allows to increase the hardness of the surface layer by more than 3 times. The elemental composition and microstructure of the sample surface were studied. The microstructure of the base material of the coated samples corresponds to the structure of the reference sample. The microstructure of the reference sample corresponds to the microstructure of low-carbon (pre-eutectoid) steel after annealing. Grained ferrite-pearlite structure with a predominance of ferrite. In the process of vibro plasma treatment in the surface layer of the sample is formed of 3 zones: the zone of deposited metal-ceramic material, a hardened area of the surface layer mixed with elements of the base and filler material and heat affected zone.
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References
Lyalyakin V.P. Sostoyanie i perspektivy uprochneniya i vosstanovleniya detalej pochvoobrabatyvayushchih mashin svarochno-naplavochnymi metodami [The state and prospects of hardening and restoration of parts of tillage machines by welding and surfacing methods] /V.P. Lyalyakin, S.A. Soloviev, V.F. Aulov //Proceedings of GOSNITI. - 2014.- Vol. 115.- Pp. 96 - 104.
Burumkulov F.Kh. Elektroiskrovye tekhnologii vosstanovleniya i uprochneniya detalej mashin i instrumentov (teoriya i praktika) [Electrospark technology for restoration and hardening of machine parts and tools (theory and practice)] /F.Kh. Burumkulov, P.P. Lezin, P.V. Senin, V.I. Ivanov, S.A. Velichko, P.A. Ionov. - Saransk, Mordovian State University named after N.P. Ogareva, 2003. - 504 p.
Titov N.V. Metod vibrodugovoj naplavki metallokeramiki detalej tekhniki, rabotayushchej v usloviyah abrazivnogo iznosa [Method for vibroarc surfacing of cermet of technical details operating under abrasive wear] / N.V. Titov, N.N. Litovchenko, V.N. Korotkov //Proceedingsof GOSNITI, 2013. - T. 111. - Part 2. - Pp. 219 - 222.
Kolomeichenko A.V. Investigation of Finemet nanocrystalline alloy coating obtained by the electric spark method /A.V. Kolomeichenko, I.S. Kuznetsov, A.Yu. Izmaylov, R.Yu. Solovyev, S.N. Sharifullin //Int. J. Nanotechnol., Vol. 15, No. 4/5, 2018.
Kolomeichenko A.V Investigation of nanometallokeramic composite coatings obtained by vibro-arc surfacing /A V. Kolomeichenko, N V Titov, Yu А Kuznetsov, L V Kalashnikova1, О О Bagrintsev, S N Sharifullin //IOP Conf. Series: Materials Science and Engineering 412 (2018) 012049 doi:10.1088/1757-899X/412/1/012049.
Sharifullin S.N. Some characteristics of surface hardening of steel 65g in the electric-spark method /S.N. Sharifullin, I.A. Fayzrakhmanov, N.R. Adigamov, R.R. Akhmetzyanov, A.T. Bayniyazova and. etc. A.T. Bayniyazova //Journal of Physics: Conf. Series 1328 (2019) 012100 doi:10.1088/1742-6596/1328/1/012100.
Denisov V.A. Vosstanovlenie bazovyh detalej dizel'nyh dvigatelej s avarijnymi defektami pokrytiyami na osnove kompozicionnyh materialov [Restoring the basic parts of diesel engines with emergency coating defects based on composite materials]: the dissertation ... Doctors of technical sciences: 05.20.03 /Denisov Vyacheslav Aleksandrovich. - Saransk, 2015 .- 383 p.
Velichko S.A. Razrabotka vysokoeffektivnyh tekhnologij remonta agregatov navesnyh gidrosistem traktorov s primeneniem metoda elektroiskrovoj obrabotki [Development of high-performance repair technologies for tractors mounted hydraulic systems using the electric spark treatment method]: dissertation ... Doctors of technical sciences: 05.20.03 /Velichko Sergey Anatolevich. - Saransk, 2017 .- 480 p.
Zadorozhny R.N. Metallograficheskie issledovaniya stal'nyh obrazcov, uprochnennyh karbovibrodugovoj naplavkoj [Metallographic studies of steel samples hardened by carbon-arc welding deposition] /P.N. Zadorozhny, S.P. Tuzhilin //Transactions of GOSNITI, 2016. - Moscow. - Volume 124. - Part 2. - Pp. 57 - 61.