Actual Problems in Machine Building 2015 No. 2

Актуальные проблемы в машиностроении. 2015. №2 Инновационные технологии в машиностроении ____________________________________________________________________ 125 EXPERIMENTS ON THE FLOWING CHROMIUM-PLATING PROCESS WITH SUPERDISPERSED DIAMONDS Andreev A. S., Engineer, e-mail: Arzur@bk.ru Belayev V. N., Head of Laboratory, Ph.D. (Engineering), e-mail: tmp-bti@ya.ru Kozlyuk A. Yu., Senior Researcher, Ph.D. (Engineering), e-mail: andrey-pbuk@mail.ru , mf@bti.secna.ru Lobunets A. V., Engineer JSC "Federal Research & Production Center Altai", 1 Sotsialisticheskaya st., Biysk, 659322, Russian Federation Abstract The paper presents the results of studying flowing chromium-plating of internal surfaces of long- length cylindrical parts in the electrolyte with superdispersed diamonds when a workpiece is continuously rotating in the process of chromium-plating. Experimental samples were obtained during the experiments carried out with such variable technological parameters as the electrolyte temperature and the part rotation frequency. The estimation of porosity, micro-hardness, thickness of chrome coatings and its uniformity as well as the precipitation structure was performed by the method of scanning electron microscopy. The results showed that the use of superdispersed diamonds and the implementation of part-cathode rotation in flowing chromium-plating made it possible to increase servicing characteristics of coatings due to a decrease in grain sizes of the chrome coating structure and in porosity, and due to an increase in microhardness, which confirms the efficiency of using the suggested method of coating deposition and the given type of superdispersed fillers in chromium-plating. Keywords galvanic coating, superdispersed diamond, flowing chromium-plating