SURFACE TREATMENT OF STRUCTURAL STEEL IN HIGH–TEMPERATURE PLASMA FLOW

The paper presents the results of studies, mainly using atomic force microscopy (AFM), modification of the surface structure of structural steels after plasma treatment with one and several pulses. The surface topology and the evolution of the relief depending on the main processing parameters are investigated. According to the results of metallography, it was concluded that the surface hardness of the samples was repeatedly processed. The effect of changes in the structure on the hardness of the steel surface is studied. The changes in the structure of the studied steels associated with the formation of a new phase – iron nitride and micro – distortions in the crystal lattice, which may be responsible for hardening, were revealed by the RSA method. In General, the results of processing by pulsed plasma flows, leading to changes in physical and mechanical properties at the nanoscale, which may be due to structural and phase changes and defect formation, are presented.

1. Жукешов А.М., Баимбетов Ф.Б., Ибраев Б.М. Импульсные ускорители плазмы и их технологическое применение. – Алматы: «Қазақ университеті», 2009. – 134 с.

2. Garkusha I.E., et. al. // Vacuum. – 2000. –58. – P. 195.

3. Tereshin V.I., et. al. // Review of Scientific Instruments. – 2002. – 73. – P. 831.

4. Uglov V.V., et. al. // Vacuum. – 2007. – 81 – P. 1341.

5. Tereshin V.I. et.al. // Vacuum. – 2004. – 73. – P. 555.

6. Tereshin V.I. at al. Pulsed plasma accelerators of different gas ions for surface modification // Rev. Sci. Instrum. – 2002. –V.73, №2. – Р. 1–3.

7. Chebotarev V.V., Garkusha I.E., Langner J. at al. Surface structure changes induced by pulsed plasma streams processing // Problems of atomic science and technology. – Series: Plasma physics – 1999. – №3(3). – Р.273–275.

8. Гасин Д.А., Жусупкелдиев Ш., Матвиенко В.В., Урюков Б.А. Модификация металлической поверхности импульсным потоком плазмы //Тезисы докладов 4–ой Всесоюзной конференции «Взаимодействие излучения, плазменных и электронных потоков с веществом. – Фрунзе, 1990. – С. 121.

9. Жукешов А.М., Габдуллина А.Т. Изменение размера зерна и твердости конструкционных материалов после импульсной плазменной обработки // Проблемы эволюции открытых систем. – 2007. – Т.2, Вып. 9. – С.40–45.

10. Жукешов А.М., Габдуллина А.Т., Пак С.П., Амренова А.У., Мухамедрыскызы М., Момбаева А. Влияние импульсных плазменных потоков на физико–механические характеристики поверхности нержвеющей стали // Материалы международной научной конференции «Актуальные проблемы современной физики» – Алматы, 2013. – С.154–155.