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Information × Registration Number 0213U003011, 0111U008257 , R & D reports Title Research of processes of electrodischarge effect on disperse systems of metal-carbon composition powders in a hydrocarbon fluid popup.stage_title Head Torpakov Andriy Sergiyovych, Registration Date 15-01-2013 Organization Institute of Pulse Research and Engineering popup.description2 The inquiry focuses on metal-carbon powders containing Fe and Ti. The purpose of the inquiry is to determine the physical regularities and technological modes of electrodischarge treatment of suspensions for yielding the high-quality initial powder mix. Regularities of Fe and Ti powders and 75 % Fe + 20 % Ti+ 5 % B4c mix dispersion are experimentally explored depending on electrical and energy parameters of the electrodischarge treatment. It is shown that combination of the values of current rise velocity di/dt>24 GA/s and specific energy of treatment 2,67 MJ/cu dm allows for yielding the powders when the surfactant solution is added to the working medium: Fe powder with a mean diameter <0,8 µm; Ti powder a mean diameter <0,8 µm; 75 % Fe + 20 % Ti + 5 % B4C powder mix with a mean diameter ca. 0,5 µm. It is established that EH treatment of Fe powder leads to its carbidization whose intensity depends on specific energy of treatment. Regularities of Ti powder carbidization are outlined, and with the increase of current density in the discharge channel the TIC quantity grows. Thus, treatment with current density 0,56 kA/sq.mm leads to TIC concentration 56 %. Electrodischarge treatment of powder mix 75 % Fe + 20 % Ti + 5 % B4c leads to formation of a great quantity of new phases, among which are Fe and Ti borides, intermetallics, Fe and Ti carbides. Intensity of new phase formation depends on treatment parameters. The greatest quantity of phases which may serve as additional disperse reinforcers is formed during treatment with specific energy 2,67 MJ/cu dm and di/dt ca 28 GA/s. Proceeding from the accomplished research, recommendations on making of the technology of electrodischarge preparation of initial powders for carbide steels are developed Product Description popup.authors Зайченко А.Д. popup.nrat_date 2020-04-02 Close