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UDK 621.924.093.048

 Moisejenko M.S.1, Salenko O.F.1,  Kumurgy O.U.2, Ljashenko B.A.2 , Rutkovsky A.V.2

1 – Kremenchug Mikhailo Ostrohradskyi National University, Kremenchug, Ukraine ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it )

2 – G.S. Pisarenko Institute for Problems of Strength National Academy of Sciences of Ukraine, Kyiv, Ukraine

  APPLICATION OF WEAR-RESISTANT COATINGS FOR INCREASING EFFICIENCY OF ELEMENTS OF HYDROCUTTING DEVICES

  Моісеєнко М. С.1, Саленко О. Ф. 1  д.т.н., проф.

Кумуржи О. Ю. 2, Ляшенко Б. А. 2 д.т.н., проф., Рутковський А. В. 2 к.т.н., ст.н.с.

1 – Кременчуцький національний університет імені Михайла Остроградського, м. Кременчук, Україна ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it ); 2 – Інститут проблем міцності ім. Г. С. Писаренка НАН України, м. Київ, Україна ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it )

 ЗАСТОСУВАННЯ ЗНОСОСТІЙКИХ ПОКРИТТІВ ДЛЯ ПІДВИЩЕННЯ ПРАЦЕЗДАТНОСТІ ЕЛЕМЕНТІВ ГІДРОРІЗАЛЬНИХ ПРИСТРОЇВ

 

Abstract.
Purpose. Among the trends of hydroabrasive treatment the improving of the accuracy and efficiency of processing equipment is allocated. Effectiveness can be enhanced by increasing fluid pressure and the number of concurrent working heads. However, increasing of working pressure leads to intensification of systems of wear of hydrocutting equipment, including calibration tubes, which in turn reflected in the cost of processing. In this regard, an urgent task is improving the stability of calibration tube using the
functional-oriented approach.
Design/methodology/approach. To analyze the phenomena that occur in calibration tube during the formation of liquid abrasive flow the software package Flow Vision was used. When modeling the problem of detection of conditionality of diagrams load on the cross-section of calibration tube with microhermetic parameters of jet erosion was treated, establish the role and activity of wave processes occurring in streams and exert force on the inner diameter of the calibration tube. To address the question of whether the
use of certain surface coatings on hydroabrasive resistance the samples with size 40x10x5 mm from titanium alloy VK8 were tested, which is instrumental material of elements of hydroabrasive processing, as no cover, so with a vacuum-plasma coating TiN, with the nitrided layer and the combined coverage of the nitrided layer and TiN.
Findings. сomparative experimental tests have shown that depending on the modes of technological processing, samples with a combined surface of the nitrided layer and TiN wearless intense than the samples without coating when exposed hydroabrasive stream.
Originality/value. The functional dependence of wear of calibration tubes with coating for criteria of hydroabrasive stability complete the overall methodological information base and certainly contribute to the development of the principle properties of the surface layer.


Keywords: coatings, hydrocutting devices, hydro-cavitation wear.

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