blackmetИзвестия высших учебных заведений. Черная МеталлургияIzvestiya. Ferrous Metallurgy0368-07972410-2091National University of Science and Technology "MISIS"10.17073/0368-0797-2015-4-272-276blackmet-654Research ArticleМАТЕРИАЛОВЕДЕНИЕ И НАНОТЕХНОЛОГИИMATERIAL SCIENCE AND NANOTECHNOLOGIESСТРУКТУРА И МИКРОТВЕРДОСТЬ ТИТАНОВЫХ СПЛАВОВ ПОСЛЕ ЭЛЕКТРОМЕХАНИЧЕСКОЙ ОБРАБОТКИ И УЛЬТРАЗВУКОВОГО ПОВЕРХНОСТНОГО ЛЕГИРОВАНИЯSTRUCTURE AND MICROHARDNESS OF TITANIUM ALLOYS AFTER ELECTROMECHANICAL TREATMENT AND ULTRASONIC SURFACE ALLOYINGБагмутовВ. П.BagmutovV. P.

д.т.н., профессор кафедры сопротивления материалов

Dr. Sci. (Eng.), Professor of the Chair strength of materials

sopromat@vstu.ruВодопьяновВ. И.Vodop’yanovV. I.

к.т.н., доцент кафедры сопротивления материалов

Cand. Sci. (Eng.), Assist. Professor of the Chair strength of materials

ДенисевичД. С.DenisevichD. S.

аспирант кафедры сопротивления материалов

Postgraduate of the Chair strength of materials

ЗахаровИ. Н.ZakharovI. N.

д.т.н., заведующий кафедрой сопротивления материалов

Dr. Sci. (Eng.), Assist. Professor, Head of the Chair strength of materials

ЗахароваЕ. Б.ZakharovaE. B.

инженер кафедры сопротивления материалов

Engineer of the Chair strength of materials

Волгоградский государственный технический университет 400005, Россия, Волгоград, пр. Ленина, 28РоссияVolgograd State Technical University 28, Lenina ave., Volgograd, 400005, RussiaRussian Federation201510062015584272276Copyright © Багмутов В.П., Водопьянов В.И., Денисевич Д.С., Захаров И.Н., Захарова Е.Б., 20152015Багмутов В.П., Водопьянов В.И., Денисевич Д.С., Захаров И.Н., Захарова Е.Б.Bagmutov V.P., Vodop’yanov V.I., Denisevich D.S., Zakharov I.N., Zakharova E.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://fermet.misis.ru/jour/article/view/654

Предложена комплексная технология поверхностного упрочнения титановых сплавов, основанная на сочетании поверхностного легирования бором и углеродом, электромеханической обработки (ЭМО) и безабразивной финишной ультразвуковой обработки (БУФО). Представлены результаты исследования микротвердости и особенностей структурно-фазового состояния поверхностного слоя титанового псевдо-α-сплава типа 5В после различных комбинаций обработок (ЭМО, БУФО, поверхностное легирование). Показано, что для различных схем упрочнения достигается повышение микротвердости поверхности обработанного материала до 30 – 40 %. При этом наибольший эффект наблюдается при использовании в ходе обработок ЭМО + БУФО в качестве обмазки мелкодисперсного порошка литейного графита в комбинации с органическим связующим. Увеличение микротвердости обеспечивается упрочнением за счет интенсивной пластическойдеформации металла, измельчением зерна (с 50 до 1 мкм) при фазовых превращениях, а также формированием мелкодисперсных упрочняю щих боридов и карбидов титана (содержание которых в поверхностном слое достигает 1,88 и 0,46 % соответственно).

The authors proposed the complex technology of surface hardeningof titanium alloys based on a combination of surface alloying withboron and carbon, electromechanical treatment (EMT) and non-abrasive ultrasonic fi nishing (NUF). The results of the study of microhardness and features of the structural-phase state of the surface layer of 5V titanium pseudo-α-type alloy were presented after various combinations of treatments (EMT, NUF, surface alloying). It was shown that for a variety of schemes hardening was achieved by increasing the surface microhardness of the treated material to 30 – 40 %. The greatest effect can be observed when using alloying agent during EMT + NUF (graphite cast powder in combination with an organic binder). Increase in microhardness was provided due to the hardening by severe plastic deformation of the metal, grain size refi nement (from 50 to 1 μm) during phase transitions, as well as the formation of fi ne reinforcing  borides and carbides of titanium (whose content in the surface layer increased up to 1.88 and 0.46 %, respectively).

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The authors declare that there are no conflicts of interest present.