УДОСКОНАЛЕННЯ ТЕХНОЛОГІЇ ВИГОТОВЛЕННЯ МОДИФІКАТОРІВ СИСТЕМИ Ti–TiC ТА ДОСЛІДЖЕННЯ ЇХ ВПЛИВУ НА СТРУКТУРУ НАПЛАВЛЕНОГО МЕТАЛУ ТИПУ 25Х5ФМС.

The technology of producing Ti-TiC modifiers was improved, which reduced the average diameter of its particles by more than 6 times. The use of the proposed processing procedure made it possible to produce a Ti-TiC powder with at least 20 % of TiC in its composition. It was found that for the investigated modes, processing in kerosene is more effective in terms of dispersion than processing in ethanol. The use of the produced powder as a modifier at its content in a deposited metal 25Kh5FMS at the level of 0.01 %, leads to a significant change in the microstructure and its conversion from a columnar into a cellular one. In terms of the possibility to control the structure and properties of the deposited metal, the most promising is the use of modified Ti-TiC powders of H2 and H4 type, which were produced as a result of high-voltage processing of the mixture of corresponding powders in a hydrocarbon fluid using a voluminous-distributed multi-spark discharge mode. This provides a significant effect on the structure of the deposited metal of type 25Kh5FMS, but at the same time does not lead to the formation of microcracks in the deposited metal. 12 Ref., 1 Tabl., 5 Fig. [ABSTRACT FROM AUTHOR]