Actual Problems in Machine Building 2021 Vol.8 N3-4

Актуальные проблемы в машиностроении. Том 8. № 3-4. 2021 Инновационные технологии в машиностроении ____________________________________________________________________ 29 8. Hood R., Aspinwall D.K., Voice W. Creep feed grinding of gamma titanium aluminide and burn resistant titanium alloys using SiC abrasive // International journal of machine tools and manufacture. – 2007. – Vol. 47, iss. 9. – P. 1486–1492. – DOI: 10.1016/j.ijmachtools.2006.10.008. 9. Попов М.А. Шлифование никель-титановых сплавов // СТИН. – 1981. – № 3. – С. 20– 21. 10. Потекаев А.И., Хохлов В.А., Галсанов С.В. Природа и механизмы абразивного изнашивания материалов с памятью формы на примере никелида титана // Известия Томского политехнического университета. – 2012. – Т. 321, № 2. – С. 107–111. 11. Soler Y.I., Kazimirov D.Yu. Influence of abrasive wheels characteristics on phases change of nitinol in different structural conditions // ARPN Journal of engineering and applied sciences. – 2020. – Vol. 15, iss. 11. – P. 1218–1233. 12. Солер Я.И., Казимиров Д.Ю., Метляев И.А. Повышение эффективности шлифования деталей из материалов с эффектом памяти формы // Вестник современных технологий. – 2019. – № 1 (13). – С. 12–17. 13. Обработка металлов резанием с плазменным нагревом / Н.А. Резников, М.А. Шатерни, В.С. Кунин, Л.А. Резников; под общ. ред. Н.А. Резникова. – М.: Машиностроение, 1986. – 232 с. 14. Балановский A.E. Плазменное поверхностное упрочнение металлов. – Иркутск: Изд- во ИрГТУ, 2006. – 180 с. SURFACE HARDENING OF NITINOL FOR INCREASED GRINDING QUALITY Kazimirov D.Yu., D.Sc. (Engineering), Associate Professor, e-mail: kazimirdenn@gmail.com Prokop`eva A.V., Senior Teacher, e-mail: albanoisa@yandex.ru Astahov A.D., Student, e-mail: unforgiven.2014@yandex.ru Medvedev O.A., Student, e-mail: idragon19@yandex.ru Lushpey A.D., Student, e-mail: anton.lushpej@yandex.ru Irkutsk National Research Technical University, 83, Lermontov St., Irkutsk, 664074, Russian Federation Abstract The reasons for the poor machinability of nitinol by cutting are described and a solution to the problem by plasma exposure and grinding of the processed surface is proposed. Some results of the study of abrasive treatment of nitinol, previously subjected to plasma hardening at the installation, are presented. The change in the microhardness of the surface after the processes of hardening and grinding is shown. The degree of hardening is estimated, showing retained austenite in the surface. The required allowance for flat grinding to remove the defect layer is determined. Improvement of flatness is shown; comparison of topography of initial and processed surfaces is given. Thermohardening increases the accuracy of the surface shape after grinding due to the transition of the surface layer from the martensitic phase to austenite, which is better subjected to the abrasive processing. Keywords grinding, hardening, plasma, nitinol