Autors: Penyashki T., Kostadinov G., Nikolov, A. A., Dimitrova, R. B., Kamburov, V. V., Kamdeva, M. K.
Title: Characteristics, composition and structure of coatings of WC-TiB2-B4C - Ni-Cr-B-Si-C electrodes formed on titanium alloys by contactless electrospark deposition
Keywords: electrospark deposition, structure, carbides, borides, micro

Abstract: TThe aim of the work is strengthening of titanium surfaces and increase of their wear resistance by using a cheap and simple method - local contactless electrospark deposition LESD with a cylindrical rotating around its axis electrode. A new type of multicomponent coatings of We-based hard-alloy electrodes with additives of B 4 C and TiB 2 and a bonding multimetallic mass of Ni-Cr-B-Si-Fe-C was created. The influence of process parameters and ratios between individual electrode components on the roughness, thickness, composition, structure and tribological characteristics of the coatings was studied by metallographic, profilometric, XRD, SEM, EDX and tribological methods. Dense and uniform coatings with new relief and newly formed wear resistant phases and crystal-amorphous structures were obtained. It was found that the roughness and thickness of the coatings can be varied by LESD modes in the ranges Ra =1.3÷3µ m and δ=6÷22 µm, respectively. Their microhardness ranges from 9 to 14 GP



    International conference on High Technology for Sustainable Development HiTECH 2022, 2022, Bulgaria, DOI 10.1109/HiTech56937.2022.10145576

    Вид: пленарен доклад в национален форум с межд. уч., публикация в реферирано издание, индексирана в Scopus