Actual Problems in Machine Building 2018 Vol. 5 No. 3-4

Actual Problems in Machine Building. Vol. 5. N 3-4. 2018 Materials Science in Machine Building ____________________________________________________________________ 136 SURFACE HARDENING OF 12Х18Н9Т STEEL WITH TiC BY NON-VACUUM ELECTRON BEAM CLADDING Drobyaz E.A. , Ph.D. (Engineering), e-mail: ekaterina.drobyaz@yandex.ru Bushueva E.G. , Post-graduate Student, e-mail: dusias@mail.ru Kuzin F.A. , Master’s Degree student, e-mail: kuzin_olimp@mail.ru Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The structure, microhardness and tribotechnical properties of coatings formed on the surface of 12Х18Н9Т steel investigated. The method of non-vacuum electron beam cladding of powder mixtures containing titanium carbide was used. Metallographic studies have shown that coatings have thickness from 1.2 to 1.6 mm. The microhardness of the coating is up to 9.2 GPa. The increasing of material hardness deals with distribution of titanium carbide particles in the plastic austenite matrix. In tribologecal tests against fixed abrasive particles, the wear-resistance of the cladding layers was 1,5-2 times higher than the base material specimens. It is established that the precipitation of reinforcing particles improves the tribological properties of the coatings. Keywords 12Х18Н9Т steel, titanium carbide, electron beam cladding, surface hardening, wear resistance, abrasive wear