Zakora V.V., Gankevich V.F., Lisnyak A.G. Reliability improvement of the mining machine parts by hardening of their surface

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 131

 

Geoteh. meh. 2016, 131, 75-82

 RELIABILITY IMPROVEMENT OF THE MINING MACHINE PARTS BY HARDENING OF THEIR SURFACE

¹Zakora V.V., ¹Gankevich V.F., ¹Lisnyak A.G.

¹SHEI “NMU” 

UDC 622.245.1(083.74)

Abstract. This paper presents a method for improving hardness and wear resistance of the surface layers of machine parts used in the mining industry. An effect of cementation on the structure and properties of carbon steel surface pretreated by electrical-discharge method withvanadium electrode was studied. Microstructure of and micro-hardness distribution in the samples treated by three methods - electric-discharge alloying, electric-discharge alloying after cementation and cementation after electric-discharge alloying - were compared as well as results of the sample wear after the abrasion-and-shock tests. The photos of the sample microstructure show the difference between various methods of treatment. It is found that the subsequent cementation of the alloyed layer provides 72% increase of its micro-hardness and twice increase of its wear resistance.
Keywords: electrical-discharge alloying, thermochemical treatment, cementation,microstructure, micro-hardness. 

REFERENCES

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About the authors:

Zakora Viktor Valentinovich, Master of Science, Principal Specialist of the Department Technology of Mining Engineering,, State Higher Educational Institution “National Mining University” (SHEI «NMU»), Dnepr, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .

Gankevich Valentin Feodosievich, Candidate of Technical Sciences (Ph.D), Associate Professor of the Department of Mine Machines and Engineering, State Higher Educational Institution “National Mining University” (SHEI «NMU»), Dnepr, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .

Lisnyak Aleksandr Grigorievich, Candidate of Technical Sciences (Ph.D), Associate Professor of the Department Technology of Mining Engineering, State Higher Educational Institution “National Mining University” (SHEI «NMU»), Dnepr, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .

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