Abstract
Currently, there is a need of adaptation of the Russian production of powders and market metal-powder compositions under the conditions and requirements of modern installations additive 3D technologies. Based on the characteristics of the methods of obtaining spherical powders with the aim of obtaining spherical granules of the regulated grain technology offers electroerosion dispersion characterized by relatively low energy costs and environmental cleanliness of the process. The main advantage of the proposed technology is the use as raw materials waste, which is much cheaper than the pure components used in traditional technology. In addition, this technology allows to vary the granulometric composition of the obtained powder by changing electrical parameters. The aim of this work was to study the impact of dispersion on the particle size cobalt powders are obtained for additive technologies electroerosion dispersing in alcohol. For the proposed studies selected waste cobalt alloy brand CHMS "CELLET". As working fluid - a isobutyl alcohol. To obtain cobalt powders by the method of electroerosion dispersion used for the installation of AED dielectric materials. Waste was loaded into the reactor filled with the working liquid isobutyl alcohol, the process is carried out at the following electrical parameters: capacitance of the discharge capacitor 48 microfarads; pulse frequency 80 Hz; voltage: 100 (sample 1); 120 (sample 2); 140 (sample 3). The result of the local effects of intermittent electrical discharges between the electrodes was the destruction of the waste material with the formation of dispersed particles of powder. Granulometric composition of the obtained powders were investigated using the device Analysette 22 NanoTec . The results of the research aimed to study the impact of dispersion on the particle size cobalt powders are obtained for additive technologies EDM by dispersion in alcohol, it was found that when the voltage on the electrodes of 100 V, 120 V, 140 V, the average particle size is microns of 27.09, 31,59 33,61 µm and µm, respectively.
Highlights
В настоящее время существует необходимость адаптации российского производства порошков и рынка металлопорошковых композиций под условия и требования установок современных аддитивных 3Dтехнологий
The main advantage of the proposed technology is the use as raw materials waste, which is much cheaper than the pure components used in traditional technology
7. Latypov R.A., Latypova G.R., Ageev E.V., Davydov A.A. Razrabotka i issledovanie tverdosplavnyh izdelij iz poroshkov, poluchennyh jelektrojerozionnym dispergirovaniem vol'framsoderzhashhih othodov
Summary
Для выполнения намеченных исследований выбраны отходы кобальтохромового сплава марки КХМС «ЦЕЛЛИТ». Гранулометрический состав полученных порошков исследовали на приборе Analysette 22 NanoTec. Лазерный анализатор размеров частиц «Analysette 22 NanoTec» определяет распределение по размерам частиц в суспензиях, эмульсиях и аэрозолях. 1. Распределение по размерам микрочастиц образцов: а – 1; б– 2; в – 3 ISSN 2223-1560. В анализаторах, определяющих распределение частиц по размерам посредством лазерной дифракции, используется физический принцип рассеяния электромагнитных волн. По распределению рассеянного света при помощи комплексной математики рассчитывают распределение частиц по их размерам. Нижний предел чувствительности при малых количествах мелких и крупных частиц в распределениях их по размерам (в пределах диапазона измерений) - 3 %. Измерение распределения частиц по размеру: образец исследуемого объемом около 1-5 г помещали в модуль для диспергирования в жидкости (объемом 500 мл). В таблице приведены результаты исследования распределения по размерам микрочастиц. D10, мкм D20, мкм D30, мкм D40, мкм D50, мкм D60, мкм D70, мкм Размерные характеристики частиц порошка
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