EFFECT OF THE STRUCTURE FORMED AFTER BULK AND SURFACE HARDENING ON THE HARDNESS AND WEAR RESISTANCE OF 20Cr2Ni4A STEEL
Rakhadilov B.K. Satbaeva Z.A. Kozhanova R.S. Kowalewski P. Bayatanova L.B. Kalitova A.A.
2022E.A. Buketov Karaganda University Publish house
Eurasian Physical Technical Journal
2022#19Issue 120 - 25 pp.
The article presents the results of a comparative study of the effect of bulk and surface hardening on the structure and properties of 20Cr2Ni4A steel. Surface hardening was carried out by the electrolytic plasma method. Bulk quenching was carried out by heating to a temperature of 870 °C, followed by cooling in water and oil. The structural-phase states of 20Cr2Ni4A steel samples were studied by metallographic and X-ray structural analysis. Tribological tests of the samples were carried out according to the ball-disk scheme, and the microhardness of the samples was also determined. It has been determined that after volumetric and surface hardening, the hardness and wear resistance of 20Cr2Ni4A steel increase. In this case, the most significant change is observed in samples that have undergone electrolytic plasma hardening. It has been established that high values of hardness and wear resistance of 20Cr2Ni4A steel after electrolytic plasma hardening are associated with the formation of fine-needle martensite.
electrolytic plasma hardening , microhardness , phase composition , structure , wear resistance
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Plasma Science LLP, Ust-Kamenogorsk, Kazakhstan
Wroclaw University of Science and Technology, Wroclaw, Poland
Institute of Composite Materials, Ust-Kamenogorsk, Kazakhstan
Plasma Science LLP
Wroclaw University of Science and Technology
Institute of Composite Materials
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