The expediency is demonstrated of restoring components by surfacing with Np-30KhGSA wire combined with plasma hardening. The surfacing layer does not cause machining difficulties, and under the action of plasma hardening there is an increase in wear resistance. The increase in microhardness within a hardened layer ~0.6 mm thick is from 330 to 620 HV. Friction machine tests without a lubricant by a disk–block scheme showed that in normalized (240 HB) and bulk hardening with tempering (400 HB) conditions steel 30KhGSA wear resistance is considerably inferior (by factors of 56 and 50, respectively) to its condition with plasma hardening (500 HB).
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 5, pp. 19–21, May, 2015.
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Korotkov, V.A. Plasma Hardening of a Steel 30KhGSA Surfacing Layer. Chem Petrol Eng 51, 319–323 (2015). https://doi.org/10.1007/s10556-015-0045-9
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DOI: https://doi.org/10.1007/s10556-015-0045-9