Improving Ecological Safety when Forming Wear-Resistant Coatings on the Surfaces of Rotation Body Parts of 12Kh18N10T Steel Using a Combined Technology Based on Electrospark Alloying

Abstract

The special features of thick combined electrospark coatings (СESC) formed on cylindrical 12Kh18N10T stainless steel samples are analyzed. The samples were carbonized with the help of combined electrospark alloying (CЕSA) using an Elitron-52A device and aluminized with the help of electrospark alloying (ESA) using an EIL-9 automated device at a discharge energy of Wd = 3.4 J. The coatings were deposited on the aluminized surfaces with the help of the T15K6 hard alloy using the same device at Wd = 0.9 and 3.4 J. The СESC roughness was reduced by means of ball rolling and applying a metal–polymer material (MPM) reinforced with the VK6 hard-alloy powder. A new technology to recover parts, such as rotation bodies, has been proposed for practical applications. It made it possible to form the СESC on 12Kh18N10T steel in the following sequence: CЕSA → ESA Al → ESA T15K6 → MPM (reinforced with VK6), with a thickness up to 1.5 mm, a continuity of 100%, a microhardness of ∼10 100–9500 MPa, and a roughness of Ra = 1.2 μm.