OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 26 No. 4 2024 Ta b l e 4 Change in lattice parameter after hot plastic deformation The lattice parameter The lattice parameter for the degree of plastic deformation, Å 0 % 30 % 80 % For austenite a 3.588 3.580 3.580 For borides a 5.126 5.113 5.111 c 4.228 4.238 4.199 2. The structure of the modifi ed surface layer after hot plastic deformation is a composite material with dispersed particles of the strengthening phase in the form of borides (FexCry)B. The transition layer between this material and the base metal has no cracks or pores. Borides are crushed during plastic deformation and oriented towards rolling. According to the results of durometric studies, it is found that the microhardness of the modifi ed layers after deformation is 6.5–5.5 times higher (13–11 GPa) than the microhardness of the base material 0.12 C-18 Cr-9 Ni-Ti (2 GPa), which acted as the reference material. To eliminate the spalling of particles of the strengthening phase of the modifi ed layer, it is necessary to increase the content of matrix material in it by increasing the content of chromium in the powder mixture being surfaced and reducing the content of boron. 3. Synchrotron research methods show that complex borides of type (FexCry)B are formed in the modifi ed layer, located in a γ-solid solution of iron. With an increase in the degree of plastic deformation, there is a broadening of the diff raction maxima and the volume of the elementary cells of austenite and borides increases due to the accumulation of defects in the crystal lattice. References 1. Bataev I.A., Bataev A.A., Golkovsky M.G., Teplykh A.Yu., Burov V.G., Veselov S.V. Non-vacuum electronbeam boriding of low-carbon steel. Surface and Coatings Technology, 2012, vol. 207, pp. 245–253. DOI: 10.1016/j. surfcoat.2012.06.081. 2. Bataev I.A., Bataev A.A., Golkovski M.G., Krivizhenko D.S., Losinskaya A.A., Lenivtseva O.G. Structure of surface layers produced by non-vacuum electron beam boriding. Applied Surface Science, 2013, vol. 284, pp. 472– 481. DOI: 10.1016/j.apsusc.2013.07.121. 3. Santana D.A., Koga G.Y., Wolf W., Bataev I.A., Ruktuev A.A., Bolfarini C., Kiminami C.S., Botta W.J., Jorge Jr A.M. Wear-resistant boride reinforced steel coatings produced by non-vacuum electron beam cladding. Surface and Coatings Technology, 2020, vol. 386, p. 125466. DOI: 10.1016/j.surfcoat.2020.125466. 4. Koga G.Y., Ferreira T., Guo Y., Coimbrao D.D., Jorge Jr A.M., Kiminami C.S., Bolfarini C., Botta W.J. Challenges in optimizing the resistance to corrosion and wear of amorphous Fe-Cr-Nb-B alloy containing crystalline phases. Journal of Non-Crystalline Solids, 2021, vol. 555, p. 120537. DOI: 10.1016/j.jnoncrysol.2020.120537. 5. Bataeva E.A., Bataev I.A., Burov V.G., Tushinskii L.I., Golkovskii M.G. Vliyanie iskhodnogo sostoyaniya na neodnorodnost’ struktury uglerodistykh stalei, uprochnennykh metodom elektronno-luchevoi obrabotki pri atmosfernom davlenii [The eff ect of initial state on the structure inhomogeneity of carbon steels strengthened by electron-beam treatment at atmospheric pressure]. Metallovedenie i termicheskaya obrabotka metallov = Metal Science and Heat Treatment, 2009, no. 3 (645), pp. 3–5. (In Russian). 6. Bataev I.A., Mul D.O., Bataev A.A., Lenivtseva O.G., Golkovski M.G., Lizunkova Ya.S., Dostovalov R.A. Structure and tribological properties of steel after non-vacuum electron beam cladding of Ti, Mo and graphite powders. Materials Characterization, 2016, vol. 112, pp. 60–67. DOI: 10.1016/j.matchar.2015.11.028. 7. Matts O.E., Tarasov S.Yu., Domenichini B., Lazurenko D.V., Filippov A.V., Bataev V.A., Rashkovets M.V., Chakin I.K., EmurlaevK.I. Tribo-oxidation ofTi-Al-Fe andTi-Al-Mn cladding layers obtained by non-vacuumelectron beam treatment. Surface and Coatings Technology, 2021, vol. 421, p. 127442. DOI: 10.1016/j.surfcoat.2021.127442. 8. RuktuevA.A., Lazurenko D.V., Ogneva T.S., Kuzmin R.I., Golkovski M.G., Bataev I.A. Structure and oxidation behavior of CoCrFeNiX (where X is Al, Cu, or Mn) coatings obtained by electron beam cladding in air atmosphere. Surface and Coatings Technology, 2022, vol. 448, p. 128921. DOI: 10.1016/j.surfcoat.2022.128921.
RkJQdWJsaXNoZXIy MTk0ODM1