TPWJ, 2020, #11, 2-7 pages
Influence of composition of deposited metal and thermodeformation cycle of surfacing on stability of joints of wheel steels with dispersion nitride and solid solution strengthening to cold crack formation
V.D. Poznyakov, O.A. Gaivoronskiy, A.V. Klapatyuk, A.M. Denysenko and S.V. Shmygelskyi
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
Current trends in the development of railway transport increase the load on the axle and speed of freight trains. The
relevant task is to create technologies for the production and restoration of railway wheels, which provide the extension
of their service life in different operating conditions. To solve the specified problem, it is necessary to study the influence
of different factors on the technological and operational strength of welded joints of wheel steels with dispersion
nitride and solid solution strengthening and develop the technology for restoring the rolling profile of all-rolled wheels
of freight cars. It was established that the change in resistance of the HAZ metal of wheel steels with dispersion nitride
and solid solution strengthening to delayed fracture is significantly influenced by the carbon content in steel and cooling
rate during welding. Diffusion hydrogen, contained in the deposited metal, getting into HAZ, significantly reduces
its resistance to delayed fracture. In the new wheel steel, the carbon content should not exceed 0.55 %. Under other
conditions, it will be impossible to provide the proper level of resistance of joints to the cold crack formation during
surfacing of new railway wheels. 11 Ref., 3 Tables, 4 Figures.
arc surfacing, wheel steel with dispersion nitride and solid solution strengthening, heat-affected-zone,
structure, cooling rate, diffusion hydrogen, cold cracks
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