Obrabotka Metallov / Metal Working and Material ScienceObrabotka Metallov / Metal Working and Material ScienceОбработка металлов (технология • оборудование • инструменты)1994-63092541-819XНовосибирский государственный технический университет42443710.17212/1994-6309-2026-28.2-196-222EQUIPMENT. INSTRUMENTSОБОРУДОВАНИЕ. ИНСТРУМЕНТЫResearch ArticleInvestigation of the characteristics of chip formation and wear of working surfaces of milling inserts with CVD coating in high-speed a-Ti machiningИсследование особенностей образования стружки и износа рабочих площадок фрезерных пластин с CVD-покрытием при высокоскоростной обработке a-Tihttps://orcid.org/0000-0002-7547-465257194154215Q-6745-20172619-0230ПивкинПетр МихайловичPivkinPetr M.
Russian Federation

Ph.D. (Engineering)

канд. техн. наук

pmpivkin@gmail.comhttps://orcid.org/0000-0003-2334-167955647175700N-1472-20164110-5685БабаевАртём СергеевичBabaevArtyom S.
Russian Federation

канд. техн. наук

Ph.D. (Engineering)

temkams@mail.ruhttps://orcid.org/0000-0001-8254-58537101640980A-5335-20143138-0441SavchenkoNickolai L.СавченкоНиколай Леонидович
Russian Federation

доктор техн. наук

D.Sc. (Engineering)

savnick@ispms.ruhttps://orcid.org/0000-0001-9351-571357117126400AAH-4717-20198273-1440KozlovViktor N.КозловВиктор Николаевич
Russian Federation

Ph.D. (Engineering), Associate Professor

канд. техн. наук, доцент

kozlov-viktor@bk.ruhttps://orcid.org/0000-0002-8663-487758429868000HSE-8277-20238935-8238СемёновАртём РомановичSemenovArtem R.
Russian Federation

Младший научный сотрудник

Junior researcher

artems2102@yandex.ruhttps://orcid.org/0009-0001-5535-07246603519003G-3869-20167275-9070GrechishnikovVladimir A.ГречишниковВладимир Андреевич
Russian Federation

D.Sc. (Engineering), Professor

доктор техн. наук, профессор

grechishnikov1935@gmail.comhttps://orcid.org/0000-0003-1137-64366701347361ABF-5261-20201255-2232UvarovaLudmila A.УвароваЛюдмила Александровна
Russian Federation

D.Sc. (Physics and Mathematics), Professor

доктор физ.-мат. наук, профессор

l.uvarova@stankin.ruhttps://orcid.org/0000-0003-3652-742157222469666D-3637-20142908-4162НадыктоАлексей БорисовичNadyktoAlexey B.
Russian Federation

доктор физ.-мат. наук, профессор

D.Sc. (Physics and Mathematics), Professor

abnadykto@yandex.ruМосковский государственный технологический университет «СТАНКИН»Moscow State University of Technology "STANKIN"National Research Tomsk Polytechnic UniversityНациональный исследовательский Томский политехнический университетNational Research Tomsk State UniversityНациональный исследовательский Томский государственный университетruen282ТОМ 28, №2 (2026)VOL 28, NO2 (2026)19622202062026Copyright ©; 2026, Pivkin P.M., Babaev A.S., Savchenko N.L., Kozlov V.N., Semenov A.R., Grechishnikov V.A., Uvarova L.A., Nadykto A.B.Copyright ©; 2026, Пивкин П.М., Бабаев А.С., Савченко Н.Л., Козлов В.Н., Семёнов А.Р., Гречишников В.А., Уварова Л.А., Надыкто А.Б.2026Pivkin P.M., Babaev A.S., Savchenko N.L., Kozlov V.N., Semenov A.R., Grechishnikov V.A., Uvarova L.A., Nadykto A.B.Пивкин П.М., Бабаев А.С., Савченко Н.Л., Козлов В.Н., Семёнов А.Р., Гречишников В.А., Уварова Л.А., Надыкто А.Б.https://creativecommons.org/licenses/by/4.0https://journals.rcsi.science/1994-6309/article/view/424437

Introduction. Due to the wide application of pure α-titanium in critical products, the intensification of its machining by cutting is an urgent task. Existing studies focus mainly on alloyed alloys, while the features of high-speed dry milling of pure α-Ti are not well understood. The aim of this work was to investigate the influence of milling modes on the wear of a CVD-coating (Al2O3/TiCN+TiN) on carbide inserts, chip morphology and deformation processes in the surface layer of Ti Grade 2 alloy. Methodology. The experiments were carried out using parallel milling in the range of cutting speeds v = 100–300 m/min, feed rates f = 50–100 mm/min and depths of cut aр = 0.2–0.4 mm without coolant. The condition of the cutting edges and the morphology of the chips were investigated using SEM and EDX. X-ray diffraction analysis was used to assess deformation changes. The data were processed using correlation and regression analysis methods. Results and discussion. It has been found that with increasing cutting speed, adhesion processes and thermomechanical stresses are intensified, leading to local scraping and delamination of the CVD coating on the rake surface. At a speed of 300 m/min, there is significant material buildup, forming an unstable built-up edge. The study of the chips revealed a transition from continuous to elemental form. A strong negative correlation (r = −0.81) between the cutting speed and the height of protrusions (h3) on the chip was found, as well as a moderate positive influence of the depth of cut on the continuity coefficient (r = 0.55). The results obtained are relevant for the optimization of high-speed dry machining of pure titanium products used in cryogenic engineering and heat exchangers. Conclusions. The dominant wear mechanisms are adhesion and thermomechanical degradation of the coating. The critical mode leading to intensive buildup is a combination of v = 300 m/min, f = 100 mm/min, aр = 0.4 mm. To reduce wear, it is recommended to control heat dissipation by optimizing cutting speed and depth of cut.

Введение. Ввиду широкого применения технически чистого α-титана в ответственных изделиях, актуальна задача интенсификации его обработки резанием. Существующие исследования преимущественно сфокусированы на легированных сплавах, в то время как особенности высокоскоростного сухого фрезерования чистого α-Ti изучены недостаточно. Целью работы являлось исследование влияния режимов фрезерования на износ CVD-покрытия (Al2O3/TiCN+TiN) твердосплавных пластин, морфологию стружки и деформационные процессы в поверхностном слое сплава ВТ1-0. Методология. Эксперименты проводились методом торцевого попутного фрезерования в диапазоне скоростей резания (v) 100…300 м/мин, подач (f) 50…100 мм/мин и глубин резания (aр) 0,2…0,4 мм без СОЖ. Состояние режущих кромок и морфология стружки исследовались с помощью СЭМ и EDX. Данные обрабатывались методами корреляционного и регрессионного анализа. Результаты и обсуждение. Установлено, что с ростом скорости резания интенсифицируются адгезионные процессы и термомеханические напряжения, приводящие к локальным сколам и отслоениям CVD-покрытия на передней поверхности. При скорости 300 м/мин наблюдаются значительные налипы материала, формирующие нестабильный нарост. Исследование стружки выявило переход от сливной к элементной форме. Установлена сильная отрицательная корреляция (r = –0,81) между скоростью резания и высотой выступов (h3) на стружке, а также умеренное положительное влияние глубины резания на коэффициент её сплошности (r = 0,55). Полученные результаты значимы для оптимизации режимов высокоскоростной сухой обработки изделий из технически чистого титана, используемых в криогенной технике и теплообменниках. Выводы. Доминирующими механизмами износа являются адгезия и термомеханическое усталостное разрушение покрытия. Предельным режимом, приводящим к интенсивному налипообразованию, является комбинация v = 300 м/мин, f = 100 мм/мин, aр = 0,4 мм. Для снижения износа рекомендуется контроль тепловыделения путём оптимизации скорости резания и глубины фрезерования.

Титановый сплавВысокоскоростное фрезерованиеСтружкаИзносTitanium alloyHigh-speed millingChipWear and tearФинансирование Исследование выполнено при финансовой поддержке РНФ № 22-79-10353-П. Благодарности Авторы выражают благодарность ЦКП ФХМА (ТПУ).Funding The research carried out with the financial support of the Russian Federation under project No. 22‑79‑10353‑П. Acknowledgements The authors express their gratitude to the Center for Collective Use of Physical-Chemical Mathematics (TPU).

Финансирование

Исследование выполнено при финансовой поддержке РНФ № 22-79-10353-П.

Благодарности

Авторы выражают благодарность ЦКП ФХМА (ТПУ).

Funding

The research carried out with the financial support of the Russian Federation under project No. 22‑79‑10353‑П.

Acknowledgements

The authors express their gratitude to the Center for Collective Use of Physical-Chemical Mathematics (TPU).

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